Opus 4.6 shows 200K context instead of 1M on Claude Max plan (v2.1.75)

[kirillgreen]

Description

v2.1.75 release notes state:

Added 1M context window for Opus 4.6 by default for Max, Team, and Enterprise plans (previously required extra usage)

However, /context consistently shows 14k/200k tokens (7%) — the context window remains at 200K.

Environment

• Claude Code: v2.1.75
• Model: claude-opus-4-6 (medium effort)
• Plan: Claude Max ($200/month)
• Extra usage: enabled (€0.00 spent)
• OS: macOS (Darwin 25.3.0)
• No CLAUDE_CODE_DISABLE_1M_CONTEXT env var set
• No model overrides in settings

Steps to reproduce

1. Start a new Claude Code session: claude
2. Run /context
3. Observe 200k context window instead of expected 1M

What I tried

• Starting multiple new sessions
• Enabling extra usage on claude.ai
• Verifying no env vars or settings override the context window
• Confirmed plan shows "Claude Max" in the header

Expected behavior

/context should show 1M context window as described in v2.1.75 release notes.

[Hoernchen]

Appears to be caused by setting CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC to 0 or 1 or setting DISABLE_TELEMETRY=1 so apparently you only get 1m context if they get telemetry? Unsetting that makes 1m work for me.

[chrisgagne]

For what it's worth, I've found at the moment that I am able to use the 1M context window (confirmed with /context) even with extra usage entirely disabled (both $0 monthly max and turned off). Further, I've found that after several minutes of doing so, I no longer see separate options for either Sonnet or Opus with 1M contexts in the /model dialog. Perhaps things have evolved in just the last few hours. :)

[ManufactoryOfCode]

Workaround for Opus 4.6 stuck on 200K context despite Max plan

Root cause (likely): When Opus 4.6 was updated to default to 1M context, the CLI did not automatically migrate existing model selections. If you had Opus 4.6 selected before the 1M rollout (v2.1.50), your
session continued to route to the 200K variant internally — even though the startup message says "Opus now defaults to 1M context" and /model shows "Opus 4.6".

How to verify: Run /context — if it shows xxk/200k tokens, you're affected.

Workaround:

1. Open /model
2. Switch to a different model (e.g. Haiku)
3. Open /model again — you should now see Opus 4.6 (1M) as a separate option
4. Select it

After this, /context should show xxk/1M tokens.

Suggestion: The CLI should auto-migrate existing Opus 4.6 selections to the 1M variant for Max plan users, or at minimum surface a prompt when it detects a 200K session on a plan that supports 1M.

[AspireAI-Developer]

Hi team, I'm on the Max plan ($200/month) and Claude Code still shows 200k context for Opus 4.6 instead of the expected 1M.

Environment:

• Plan: Max ($200/month)
• Claude Code version: 2.1.76
• OS: macOS (Darwin 25.3.0)
• Model: Opus 4.6 (only option in /model picker — no separate 1M variant)
• Context shown: 200k (expected: 1M per https://claude.com/blog/1m-context-ga)

Verified — none of the known env vars are set:

• DISABLE_TELEMETRY — not set
• CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC — not set
• CLAUDE_CODE_DISABLE_1M_CONTEXT — not set

I've updated to the latest version (2.1.76) and started fresh sessions — still capped at 200k.

Would appreciate any guidance on what might be blocking the 1M entitlement, or if there's
anything else I can check on my end. Happy to share account details privately if that helps with
debugging.

[davidlandais]

@AspireAI-Developer Had the same issue. You need to disable CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC. I didn't think I had it enabled, but it was present in the "env" key of ~/.claude/settings.json, which @Hoernchen confirmed.

It's a shame you have to disable this option to get access to 1M context. Not very honest.

[ZenAlexa]

Confirming that removing CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC from ~/.claude/settings.json resolved this for me as well.

Before: CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC=1 in settings.json → /context showed 200K
After: Removed the env var → restarted session → /context now shows 1M

Environment:

• Claude Code: v2.1.76
• Plan: Claude Max ($200/month)
• OS: Windows 11
• Model: Opus 4.6

Thanks to @Hoernchen and @davidlandais for identifying the root cause. That said, it would be nice if the entitlement check was decoupled from the telemetry toggle — users shouldn't have to opt into telemetry to access a paid feature.