@teamgithub fix this "Sorry, the response hit the length limit. Please rephrase your prompt" error with opus4

[melancholic-ksm]

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@teamgithub fix this "Sorry, the response hit the length limit. Please rephrase your prompt" error with opus4

Currently, I am encountering this error frequently in GitHub Copilot for VS Code, possibly due to the Opus 4 context window. I request that the team resolve this issue promptly, as it also consumes *1 premium request each time the “Try Again” action is invoked.

upvote/👍 if youre also facing same error

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[iamgurjitsingh]

I'm experiencing this too! The "response hit the length limit" error with Opus 4 in Copilot for VS Code is frustrating since it wastes premium requests.

Temporary workarounds:

1. Switch to Sonnet 4.5 temporarily - It has better context handling for longer responses
2. Be more specific in prompts - Add "keep response concise" or "limit to 500 words" to guide Copilot
3. Break requests into smaller parts - Instead of asking for full implementations, request step-by-step pieces

For GitHub team:

This seems to be a context window management issue with Opus 4. Suggestions:

• Implement automatic response chunking when approaching limits
• Show a warning before sending requests likely to hit limits
• Don't consume premium requests for failed attempts due to length limits

Workaround that helps:

Add this to your prompt: "Please keep your response under 2000 tokens and split into multiple responses if needed."

+1 for getting this fixed - it's especially problematic since each "Try Again" consumes another premium request! 👍

[jackl57]

This looks like a known issue with Opus 4 in VS Code. The model seems to hit the response limit even on normal prompts. For now, the only workaround is to shorten the request or switch to another model when possible.

Agree that it shouldn’t consume a premium request each time — hopefully the team patches this soon.

[emilanderss0n]

I'm on Pro Plus plan and get this today when trying to get the Opus 4.5 agent to replace a function and move it a helper file. It's around 1000 lines of code. Too much for a github copilot agent I guess.