diff --git a/assets/images/help/repository/create-repository-name.png b/assets/images/help/repository/create-repository-name.png
index 1c6b3dd000f8..4e6485c0c1fe 100644
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diff --git a/assets/images/help/repository/create-repository-owner.png b/assets/images/help/repository/create-repository-owner.png
index f172b5026867..c5f271f1fbba 100644
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diff --git a/assets/images/help/repository/repos-create-properties.png b/assets/images/help/repository/repos-create-properties.png
new file mode 100644
index 000000000000..2421499017fe
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diff --git a/content/copilot/concepts/billing/copilot-requests.md b/content/copilot/concepts/billing/copilot-requests.md
index 7ce4b88f42c8..04208cb0cd3f 100644
--- a/content/copilot/concepts/billing/copilot-requests.md
+++ b/content/copilot/concepts/billing/copilot-requests.md
@@ -48,7 +48,7 @@ The following {% data variables.product.prodname_copilot_short %} features can u
 
 If you use **{% data variables.copilot.copilot_free_short %}**, your plan comes with up to 2,000 code completion requests and up to 50 premium requests per month. All chat interactions count as premium requests.
 
-If you're on a **paid plan**, you get unlimited code completions and unlimited chat interactions using the included models ({% data variables.copilot.copilot_gpt_41 %} and {% data variables.copilot.copilot_gpt_4o %}). Rate limiting is in place to accommodate for high demand. See [AUTOTITLE](/copilot/concepts/rate-limits).
+If you're on a **paid plan**, you get unlimited code completions and unlimited chat interactions using the included models ({% data variables.copilot.copilot_gpt_41 %} and {% data variables.copilot.copilot_gpt_4o %}. Rate limiting is in place to accommodate for high demand. See [AUTOTITLE](/copilot/concepts/rate-limits).
 
 Paid plans also receive a monthly allowance of premium requests, which can be used for advanced chat interactions, code completions using premium models, and other premium features. For an overview of the amount of premium requests included in each plan, see [AUTOTITLE](/copilot/about-github-copilot/subscription-plans-for-github-copilot#comparing-copilot-plans).
 
diff --git a/content/copilot/concepts/completions/code-suggestions.md b/content/copilot/concepts/completions/code-suggestions.md
index 9153cf25d4a6..b98f78119ff7 100644
--- a/content/copilot/concepts/completions/code-suggestions.md
+++ b/content/copilot/concepts/completions/code-suggestions.md
@@ -89,7 +89,7 @@ contentType: concepts
 
 ## About the AI model used for {% data variables.product.prodname_copilot_short %} code completion
 
-{% data variables.product.prodname_copilot_short %} code completion uses the {% data variables.copilot.copilot_gpt_4o %} {% data variables.product.prodname_copilot_short %} model. This is a fine-tuned version of the GPT-4o mini model. The {% data variables.copilot.copilot_gpt_4o %} {% data variables.product.prodname_copilot_short %} model was trained on a wide range of high quality public {% data variables.product.github %} repositories, providing coverage of over 30 programming languages. See [Programming languages included in the default model](#programming-languages-included-in-the-default-model) below.
+{% data variables.product.prodname_copilot_short %} code completion uses the {% data variables.copilot.copilot_gpt_4o %} {% data variables.product.prodname_copilot_short %} model. The {% data variables.copilot.copilot_gpt_4o %} {% data variables.product.prodname_copilot_short %} model was trained on a wide range of high quality public {% data variables.product.github %} repositories, providing coverage of over 30 programming languages. See [Programming languages included in the default model](#programming-languages-included-in-the-default-model) below.
 
 {% vscode %}
 
diff --git a/content/copilot/how-tos/configure-personal-settings/configure-network-settings.md b/content/copilot/how-tos/configure-personal-settings/configure-network-settings.md
index e99da56cacd1..e578dc0adb50 100644
--- a/content/copilot/how-tos/configure-personal-settings/configure-network-settings.md
+++ b/content/copilot/how-tos/configure-personal-settings/configure-network-settings.md
@@ -71,7 +71,16 @@ If you have configured a proxy but are still encountering connection errors, see
 
 ### Basic authentication
 
-{% data variables.product.prodname_copilot_short %} for {% data variables.product.prodname_vs %} does not retrieve authentication credentials from the Windows settings. If you need to authenticate to a proxy, you can include your credentials in the proxy URL (for example: `http://USERNAME:PASSWORD@10.203.0.1:5187/`), then set this URL as one of the supported environment variables listed in [Proxy settings for {% data variables.product.prodname_copilot_short %}](/copilot/concepts/network-settings-for-github-copilot#proxy-settings-for-copilot).
+While {% data variables.product.prodname_copilot_short %} for {% data variables.product.prodname_vs %} reads the proxy settings from Windows, it does not retrieve authentication credentials from those Windows settings.
+
+If you need to authenticate to a proxy, you can try one of the below:
+1. Enable passing default proxy credentials by setting the environment variable `COPILOT_USE_DEFAULTPROXY` to `true`. 
+   - **Windows example**: Open the Command Prompt and run the following command:
+     ```
+     setx COPILOT_USE_DEFAULTPROXY true
+     ```
+     This sets the variable permanently for your user account. Restart any applications that need to use this variable.
+2. You can include your credentials in the proxy URL (for example: `http://USERNAME:PASSWORD@10.203.0.1:5187/`), then set this URL as one of the supported environment variables listed in [Proxy settings for {% data variables.product.prodname_copilot_short %}](/copilot/concepts/network-settings-for-github-copilot#proxy-settings-for-copilot).
 
 {% endvisualstudio %}
 
diff --git a/content/copilot/how-tos/use-ai-models/create-a-custom-model.md b/content/copilot/how-tos/use-ai-models/create-a-custom-model.md
index 4fea74f367a8..244b4d5065d3 100644
--- a/content/copilot/how-tos/use-ai-models/create-a-custom-model.md
+++ b/content/copilot/how-tos/use-ai-models/create-a-custom-model.md
@@ -17,7 +17,7 @@ redirect_from:
 contentType: how-tos
 ---
 
-> [!NOTE] The current {% data variables.release-phases.public_preview %} of custom models for {% data variables.copilot.copilot_enterprise %} will be discontinued. For now, participants can continue using their custom models, but we are no longer processing new training requests. We encourage participants to try the newer {% data variables.copilot.copilot_gpt_4o %} {% data variables.product.prodname_copilot_short %} code completion model. See [Changing the AI model for Copilot code completion](/copilot/using-github-copilot/ai-models/changing-the-ai-model-for-copilot-code-completion?tool=vscode).
+> [!NOTE] The current {% data variables.release-phases.public_preview %} of custom models for {% data variables.copilot.copilot_enterprise %} will be discontinued. For now, participants can continue using their custom models, but we are no longer processing new training requests. We encourage participants to try the newer {% data variables.copilot.copilot_gpt_41 %} {% data variables.product.prodname_copilot_short %} code completion model. See [Changing the AI model for Copilot code completion](/copilot/using-github-copilot/ai-models/changing-the-ai-model-for-copilot-code-completion?tool=vscode).
 
 ## Prerequisite
 
diff --git a/content/copilot/how-tos/use-chat/use-chat-in-github.md b/content/copilot/how-tos/use-chat/use-chat-in-github.md
index 55e83788daf5..ffd9aee0ea4c 100644
--- a/content/copilot/how-tos/use-chat/use-chat-in-github.md
+++ b/content/copilot/how-tos/use-chat/use-chat-in-github.md
@@ -140,7 +140,6 @@ You can attach an image to {% data variables.product.prodname_copilot_short %} a
 1. If you see the AI model picker at the top of the page, select one of the models that supports adding images to prompts:
 
    * {% data variables.copilot.copilot_gpt_41 %} (the default that's used if you don't see a model picker)
-   * {% data variables.copilot.copilot_gpt_4o %}
    * {% data variables.copilot.copilot_claude_sonnet_35 %}
    * {% data variables.copilot.copilot_claude_sonnet_37 %}
    * {% data variables.copilot.copilot_gemini_flash %}
diff --git a/content/copilot/how-tos/use-chat/use-chat-in-ide.md b/content/copilot/how-tos/use-chat/use-chat-in-ide.md
index 5488dcfadb82..6adf4d4b151a 100644
--- a/content/copilot/how-tos/use-chat/use-chat-in-ide.md
+++ b/content/copilot/how-tos/use-chat/use-chat-in-ide.md
@@ -161,7 +161,6 @@ For more information, see [{% data variables.copilot.copilot_edits_short %}](htt
 1. If you see the AI model picker at the bottom right of the chat view, select one of the models that supports adding images to prompts:
 
    * {% data variables.copilot.copilot_gpt_41 %} (the default that's used if you don't see a model picker)
-   * {% data variables.copilot.copilot_gpt_4o %}
    * {% data variables.copilot.copilot_claude_sonnet_35 %}
    * {% data variables.copilot.copilot_claude_sonnet_37 %}
    * {% data variables.copilot.copilot_gemini_flash %}
@@ -309,7 +308,6 @@ When you use {% data variables.copilot.copilot_agent_short %} mode, each prompt
 1. If you see the AI model picker at the bottom right of the chat view, select one of the models that supports adding images to prompts:
 
    * {% data variables.copilot.copilot_gpt_41 %} (the default that's used if you don't see a model picker)
-   * {% data variables.copilot.copilot_gpt_4o %}
    * {% data variables.copilot.copilot_claude_sonnet_35 %}
    * {% data variables.copilot.copilot_claude_sonnet_37 %}
    * {% data variables.copilot.copilot_gemini_flash %}
diff --git a/content/copilot/reference/ai-models/model-comparison.md b/content/copilot/reference/ai-models/model-comparison.md
index 0fbea9b993da..4070716b163c 100644
--- a/content/copilot/reference/ai-models/model-comparison.md
+++ b/content/copilot/reference/ai-models/model-comparison.md
@@ -26,7 +26,6 @@ Use this table to find a suitable model quickly, see more detail in the sections
 | Model                                                 | Task area | Excels at (primary use case) | Additional capabilities |
 |-------------------------------------------------------|-----------|-------------------------------|--------------------------|
 | {% data variables.copilot.copilot_gpt_41 %}           | General-purpose coding and writing | Fast, accurate code completions and explanations | Agent mode, vision |
-| {% data variables.copilot.copilot_gpt_4o %}           | General-purpose coding and writing | Fast completions and visual input understanding | Agent mode, vision |
 | {% data variables.copilot.copilot_o3 %}               | Deep reasoning and debugging | Multi-step problem solving and architecture-level code analysis | Reasoning |
 | {% data variables.copilot.copilot_o4_mini %}          | Fast help with simple or repetitive tasks | Fast, reliable answers to lightweight coding questions | Lower latency |
 | {% data variables.copilot.copilot_claude_opus_41 %}   | Deep reasoning and debugging | Complex problem-solving challenges, sophisticated reasoning | Reasoning, vision |
@@ -44,7 +43,6 @@ Use these models for common development tasks that require a balance of quality,
 | Model | Why it's a good fit |
 |-------|---------------------|
 | {% data variables.copilot.copilot_gpt_41 %} | Reliable default for most coding and writing tasks. Fast, accurate, and works well across languages and frameworks. |
-| {% data variables.copilot.copilot_gpt_4o %} | Delivers GPT-4–level performance with lower latency. |
 | {% data variables.copilot.copilot_claude_sonnet_37 %} | Produces clear, structured output. Follows formatting instructions and maintains consistent style. |
 | {% data variables.copilot.copilot_gemini_flash %} | Fast and cost-effective. Well suited for quick questions, short code snippets, and lightweight writing tasks. |
 | {% data variables.copilot.copilot_o4_mini %} | Optimized for speed and cost efficiency. Ideal for real-time suggestions with low usage overhead. |
@@ -147,7 +145,7 @@ If your task involves deep reasoning or large-scale refactoring, consider a mode
 
 ## Next steps
 
-Choosing the right model helps you get the most out of {% data variables.product.prodname_copilot_short %}. If you're not sure which model to use, start with a general-purpose option like {% data variables.copilot.copilot_gpt_41 %} or {% data variables.copilot.copilot_gpt_4o %}, then adjust based on your needs.
+Choosing the right model helps you get the most out of {% data variables.product.prodname_copilot_short %}. If you're not sure which model to use, start with a general-purpose option like {% data variables.copilot.copilot_gpt_41 %}, then adjust based on your needs.
 
 * For detailed model specs and pricing, see [AUTOTITLE](/copilot/using-github-copilot/ai-models/supported-ai-models-in-copilot).
 * For more examples of how to use different models, see [AUTOTITLE](/copilot/using-github-copilot/ai-models/comparing-ai-models-using-different-tasks).
diff --git a/content/copilot/reference/ai-models/supported-models.md b/content/copilot/reference/ai-models/supported-models.md
index c3bbd117cab9..4cad2eaad7bc 100644
--- a/content/copilot/reference/ai-models/supported-models.md
+++ b/content/copilot/reference/ai-models/supported-models.md
@@ -38,7 +38,6 @@ This table lists the AI models available in {% data variables.product.prodname_c
 | Model name                                                     | Provider | Release status | Agent mode | Ask mode | Edit mode |
 |----------------------------------------------------------------|----------|--------------|------------|----------------------|---------------|
 | {% data variables.copilot.copilot_gpt_41 %}                    | OpenAI | GA | {% octicon "check" aria-label="Included" %} | {% octicon "check" aria-label="Included" %} | {% octicon "check" aria-label="Included" %} |
-| {% data variables.copilot.copilot_gpt_4o %}                    | OpenAI | GA | {% octicon "check" aria-label="Included" %} | {% octicon "check" aria-label="Included" %} | {% octicon "check" aria-label="Included" %} |
 | {% data variables.copilot.copilot_o3 %}                        | OpenAI | {% data variables.release-phases.public_preview_caps %} | {% octicon "x" aria-label="Not included" %} | {% octicon "check" aria-label="Included" %} | {% octicon "check" aria-label="Included" %} |
 | {% data variables.copilot.copilot_o4_mini %}                   | OpenAI | {% data variables.release-phases.public_preview_caps %} | {% octicon "x" aria-label="Not included" %} | {% octicon "check" aria-label="Included" %} | {% octicon "check" aria-label="Included" %} |
 | {% data variables.copilot.copilot_claude_opus_41 %}            | Anthropic | {% data variables.release-phases.public_preview_caps %} | {% octicon "x" aria-label="Not included" %} | {% octicon "check" aria-label="Included" %} | {% octicon "check" aria-label="Included" %} |
@@ -61,7 +60,6 @@ The following table shows which models are available in each client.
 | Model                                                          | {% data variables.product.prodname_dotcom_the_website %} | {% data variables.product.prodname_vscode %} | {% data variables.product.prodname_vs %}    | Eclipse                                     | Xcode                                       | JetBrains IDEs                              |
 |----------------------------------------------------------------|------------|---------|---------------------------------------------|---------------------------------------------|---------------------------------------------|---------------------------------------------|
 | {% data variables.copilot.copilot_gpt_41 %}                    | {% octicon "check" aria-label="Included" %}           | {% octicon "check" aria-label="Included" %}       | {% octicon "check" aria-label="Included" %} | {% octicon "check" aria-label="Included" %} | {% octicon "check" aria-label="Included" %} | {% octicon "check" aria-label="Included" %} |
-| {% data variables.copilot.copilot_gpt_4o %}                    | {% octicon "check" aria-label="Included" %}          | {% octicon "check" aria-label="Included" %}       | {% octicon "check" aria-label="Included" %} | {% octicon "check" aria-label="Included" %} | {% octicon "check" aria-label="Included" %} | {% octicon "check" aria-label="Included" %} |
 | {% data variables.copilot.copilot_o3 %}                        | {% octicon "check" aria-label="Included" %}          | {% octicon "check" aria-label="Included" %}       | {% octicon "x" aria-label="Not included" %} | {% octicon "check" aria-label="Included" %} | {% octicon "check" aria-label="Included" %} | {% octicon "check" aria-label="Included" %} |
 | {% data variables.copilot.copilot_o4_mini %}                   | {% octicon "check" aria-label="Included" %}          | {% octicon "check" aria-label="Included" %}       | {% octicon "x" aria-label="Not included" %} | {% octicon "check" aria-label="Included" %} | {% octicon "check" aria-label="Included" %} | {% octicon "check" aria-label="Included" %} |
 | {% data variables.copilot.copilot_claude_opus_41 %}            | {% octicon "check" aria-label="Included" %}           | {% octicon "check" aria-label="Included" %}         | {% octicon "x" aria-label="Not included" %} | {% octicon "x" aria-label="Not included" %} | {% octicon "x" aria-label="Not included" %} | {% octicon "x" aria-label="Not included" %} |
diff --git a/content/copilot/tutorials/compare-ai-models.md b/content/copilot/tutorials/compare-ai-models.md
index 248cc34d0fc8..8e28c096abb1 100644
--- a/content/copilot/tutorials/compare-ai-models.md
+++ b/content/copilot/tutorials/compare-ai-models.md
@@ -21,9 +21,9 @@ These examples show how models vary in their reasoning style, response depth, an
 
 For a full list of supported models and side-by-side feature comparisons, see [AUTOTITLE](/copilot/reference/ai-models/model-comparison).
 
-## {% data variables.copilot.copilot_gpt_4o %}
+## {% data variables.copilot.copilot_gpt_41 %}
 
-{% data reusables.copilot.model-use-cases.gpt-4o %}
+{% data reusables.copilot.model-use-cases.gpt-41 %}
 
 ### Example scenario
 
@@ -71,10 +71,10 @@ def grant_editor_access(user_id, doc_id):
     )
 ```
 
-### Why {% data variables.copilot.copilot_gpt_4o %} is a good fit
+### Why {% data variables.copilot.copilot_gpt_41 %} is a good fit
 
 * The function is short and self-contained, making it ideal for quick docstring generation.
-* {% data variables.copilot.copilot_gpt_4o %} can recognize the pattern and provide a clear, concise explanation.
+* {% data variables.copilot.copilot_gpt_41 %} can recognize the pattern and provide a clear, concise explanation.
 * The task doesn't require deep reasoning or complex logic.
 
 ## {% data variables.copilot.copilot_o4_mini %}
diff --git a/content/copilot/tutorials/migrate-a-project.md b/content/copilot/tutorials/migrate-a-project.md
index 48e33fad0854..d4e789b6b1a9 100644
--- a/content/copilot/tutorials/migrate-a-project.md
+++ b/content/copilot/tutorials/migrate-a-project.md
@@ -111,7 +111,7 @@ template
 └── template.php
 ```
 
-This example gives the prompts you can enter into {% data variables.copilot.copilot_chat_short %} to complete the migration, and the responses {% data variables.product.prodname_copilot_short %} returned for one instance of this migration. The {% data variables.copilot.copilot_gpt_4o %} model was used to generate these responses. {% data variables.copilot.copilot_chat_short %} responses are non-deterministic, so you will probably get slightly different responses to the ones shown here.
+This example gives the prompts you can enter into {% data variables.copilot.copilot_chat_short %} to complete the migration, and the responses {% data variables.product.prodname_copilot_short %} returned for one instance of this migration. The {% data variables.copilot.copilot_gpt_41 %} model was used to generate these responses. {% data variables.copilot.copilot_chat_short %} responses are non-deterministic, so you will probably get slightly different responses to the ones shown here.
 
 During a migration process you are likely to get errors that you need to fix before moving ahead. {% data variables.product.prodname_copilot_short %} can help you with this. The example includes some errors and shows how you can get {% data variables.product.prodname_copilot_short %} to help you fix them.
 
diff --git a/content/repositories/creating-and-managing-repositories/creating-a-new-repository.md b/content/repositories/creating-and-managing-repositories/creating-a-new-repository.md
index 949c81f99b24..cdd46e561f36 100644
--- a/content/repositories/creating-and-managing-repositories/creating-a-new-repository.md
+++ b/content/repositories/creating-and-managing-repositories/creating-a-new-repository.md
@@ -32,14 +32,17 @@ topics:
 1. Optionally, if you chose to use a template, to include the directory structure and files from all branches in the template, and not just the default branch, select **Include all branches**.
 {% data reusables.repositories.owner-drop-down %}
 {% data reusables.repositories.repo-name %}
+{%- ifversion custom-properties-on-create %}
+1. If custom properties are required for repository creation, set the required properties for the repository. Setting custom properties may affect the validity of your chosen repository name as well as the available repository visibility. For more information, see [AUTOTITLE](/organizations/managing-organization-settings/managing-custom-properties-for-repositories-in-your-organization).
+
+   ![Screenshot of the "Required properties" section of the repo creation form, showing the properties "production" and "security tier" having values set.](/assets/images/help/repository/repos-create-properties.png)
+{% endif %}
 {% data reusables.repositories.choose-repo-visibility %}
 1. If you're not using a template, there are a number of optional items you can pre-populate your repository with. If you're importing an existing repository to {% data variables.product.github %}, don't choose any of these options, as you may introduce a merge conflict. You can add or create new files using the user interface or choose to add new files using the command line later. For more information, see [AUTOTITLE](/migrations/importing-source-code/using-the-command-line-to-import-source-code/importing-an-external-git-repository-using-the-command-line), [AUTOTITLE](/repositories/working-with-files/managing-files/adding-a-file-to-a-repository#adding-a-file-to-a-repository-using-the-command-line), and [AUTOTITLE](/pull-requests/collaborating-with-pull-requests/addressing-merge-conflicts).
     * You can create a README, which is a document describing your project. For more information, see [AUTOTITLE](/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-readmes).
     * You can create a _.gitignore_ file, which is a set of ignore rules. For more information, see [AUTOTITLE](/get-started/git-basics/ignoring-files).{% ifversion fpt or ghec %}
     * You can choose to add a software license for your project. For more information, see [AUTOTITLE](/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/licensing-a-repository).{% endif %}
 {% data reusables.repositories.select-marketplace-apps %}
-{%- ifversion custom-properties-on-create %}
-1. If custom properties are required for repository creation, set the required properties for the repository. For more information, see [AUTOTITLE](/organizations/managing-organization-settings/managing-custom-properties-for-repositories-in-your-organization).{% endif %}
 {% data reusables.repositories.create-repo %}
 {% ifversion fpt or ghec %}
 1. At the bottom of the resulting Quick Setup page, under "Import code from an old repository", you can choose to import a project to your new repository. To do so, click **Import code**.
diff --git a/data/reusables/copilot/available-models-per-plan.md b/data/reusables/copilot/available-models-per-plan.md
index 43bd48772bce..d951ca267068 100644
--- a/data/reusables/copilot/available-models-per-plan.md
+++ b/data/reusables/copilot/available-models-per-plan.md
@@ -3,7 +3,6 @@
 | Available models in chat                                       | {% data variables.copilot.copilot_free_short %} | {% data variables.copilot.copilot_pro_short %} | {% data variables.copilot.copilot_pro_plus_short %} | {% data variables.copilot.copilot_business_short %} | {% data variables.copilot.copilot_enterprise_short %} |
 |----------------------------------------------------------------|--------------------------------------------------|--------------------------------------------------|------------------------------------------------------|-------------------------------------------------------|----------------------------------------------------------|
 | {% data variables.copilot.copilot_gpt_41 %}                    | {% octicon "check" aria-label="Included" %}      | {% octicon "check" aria-label="Included" %}      | {% octicon "check" aria-label="Included" %}         | {% octicon "check" aria-label="Included" %}           | {% octicon "check" aria-label="Included" %}              |
-| {% data variables.copilot.copilot_gpt_4o %}                    | {% octicon "check" aria-label="Included" %}      | {% octicon "check" aria-label="Included" %}      | {% octicon "check" aria-label="Included" %}         | {% octicon "check" aria-label="Included" %}           | {% octicon "check" aria-label="Included" %}              |
 | {% data variables.copilot.copilot_o3 %}                        | {% octicon "x" aria-label="Not included" %}      | {% octicon "x" aria-label="Not included" %}      | {% octicon "check" aria-label="Included" %}         | {% octicon "x" aria-label="Not included" %}           | {% octicon "check" aria-label="Included" %}              |
 | {% data variables.copilot.copilot_o4_mini %}                   | {% octicon "x" aria-label="Not included" %}      | {% octicon "check" aria-label="Included" %}      | {% octicon "check" aria-label="Included" %}         | {% octicon "check" aria-label="Included" %}           | {% octicon "check" aria-label="Included" %}              |
 | {% data variables.copilot.copilot_claude_opus_41 %}            | {% octicon "x" aria-label="Not included" %}      | {% octicon "x" aria-label="Not included" %}      | {% octicon "check" aria-label="Included" %}         | {% octicon "x" aria-label="Not included" %}           | {% octicon "check" aria-label="Included" %}              |
diff --git a/data/reusables/copilot/model-use-cases/gpt-4o.md b/data/reusables/copilot/model-use-cases/gpt-41.md
similarity index 61%
rename from data/reusables/copilot/model-use-cases/gpt-4o.md
rename to data/reusables/copilot/model-use-cases/gpt-41.md
index 419139ab302d..7011d07419ae 100644
--- a/data/reusables/copilot/model-use-cases/gpt-4o.md
+++ b/data/reusables/copilot/model-use-cases/gpt-41.md
@@ -1 +1 @@
-{% data variables.copilot.copilot_gpt_4o %} is a good choice for common development tasks that benefit from speed, responsiveness, and general-purpose reasoning. If you're working on tasks that require broad knowledge, fast iteration, or basic code understanding, {% data variables.copilot.copilot_gpt_4o %} is likely the model to use.
+{% data variables.copilot.copilot_gpt_41 %} is a good choice for common development tasks that benefit from speed, responsiveness, and general-purpose reasoning. If you're working on tasks that require broad knowledge, fast iteration, or basic code understanding, {% data variables.copilot.copilot_gpt_41 %} is likely the model to use.
diff --git a/data/reusables/pages/actions-is-preferred.md b/data/reusables/pages/actions-is-preferred.md
index be53d8624df8..617b845a3858 100644
--- a/data/reusables/pages/actions-is-preferred.md
+++ b/data/reusables/pages/actions-is-preferred.md
@@ -1 +1 @@
-> [!NOTE] While this `github-pages` gem remains supported for some workflows, {% data variables.product.prodname_actions %} is now the recommended approach for deploying and automating {% data variables.product.prodname_pages %} sites.
+> [!NOTE] While the `github-pages` gem remains supported for some workflows, {% data variables.product.prodname_actions %} is now the recommended approach for deploying and automating {% data variables.product.prodname_pages %} sites.
diff --git a/data/variables/copilot.yml b/data/variables/copilot.yml
index a80095ad35a7..6ee802ceabf7 100644
--- a/data/variables/copilot.yml
+++ b/data/variables/copilot.yml
@@ -109,8 +109,8 @@ copilot_gemini: 'Gemini'
 copilot_gemini_flash: 'Gemini 2.0 Flash'
 copilot_gemini_25_pro: 'Gemini 2.5 Pro'
 # OpenAI GPT series:
-copilot_gpt_4o: 'GPT-4o'
 copilot_gpt_41: 'GPT-4.1'
+copilot_gpt_4o: 'GPT-4o'
 # OpenAI 'o' series:
 copilot_o3: 'o3'
 copilot_o4_mini: 'o4-mini'
diff --git a/src/content-render/stylesheets/octicon-table-optimization.scss b/src/content-render/stylesheets/octicon-table-optimization.scss
index ee298a533cf6..1ba34658a4ce 100644
--- a/src/content-render/stylesheets/octicon-table-optimization.scss
+++ b/src/content-render/stylesheets/octicon-table-optimization.scss
@@ -27,7 +27,7 @@ $dark-color: "%23ffffff";
   }
 
   @media (prefers-color-scheme: dark) {
-    [data-color-mode="auto"][data-dark-theme="dark"] & {
+    [data-color-mode="auto"][data-dark-theme*="dark"] & {
       background-image: octicon-svg($path, $dark-color);
     }
   }