Kimi K2.5 frequently gets in a reiteration loop

[berenddeboer]

Description

Seeing this too much:

Giving up on Kimi K2.5 for now.

Plugins

No response

OpenCode version

1.2.6

Steps to reproduce

No response

Screenshot and/or share link

No response

Operating System

Ubuntu 24.04

Terminal

Alacritty

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• Doom loop is not caught when during reasoning or output #12716: Doom loop not caught during reasoning or output (similar looping/reiteration behavior)
• Loop in certain models #3743: Loop in certain models (general model looping issue)
• Duplicate Executions in Kimi K2 Model via Cortecs or Nebius Directly #3458: Duplicate Executions in Kimi K2 Model (repetitive execution with Kimi models)

If your issue is distinct from the above, please clarify what makes it different.

[rekram1-node]

What provider?

[berenddeboer]

What provider?

Opencode Zen.

[yuriy-merkudinov]

I'm also having problems using Zen's Kimi K2.5. The Free version of Kimi K2.5 worked as expected, but the paid version somehow behaves strangely when used with the same tasks. It feels like the two models are completely different, even though that shouldn't be the case.

UPD: The free version worked until it disappeared from the desktop app.

[moritzruth]

I don’t know enough about all this to tell whether this is a proper fix or just a workaround, but setting frequency_penalty to 2.0 (the maximum) and temperature to 0.3 made Kimi K2.5 usable for me.

{
	"provider": {
		"openrouter": {
			"models": {
				"moonshotai/kimi-k2.5": {
					"options": {
						"frequency_penalty": 2.0,
						"temperature": 0.3,
					},
				},
			},
		},
	},
}