Git Copilot claude 3.7 sonnet thinking is not working in the opencode CLI

Even after toggling the thinking using '/thinking' it is giving this error::

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

claude sonnet "thinking"? #1106: Similar issue with claude sonnet "thinking" model configuration
Bug: incorrect max_tokens calculation when "thinking" is enabled & "budgetTokens" is set for Anthropic models #2055: Bug with incorrect max_tokens calculation when "thinking" is enabled & "budgetTokens" is set for Anthropic models
AI_APICallError: "stream=true" with structured outputs is currently not supported for reasoning models. #992: Related error with reasoning models - "stream=true" with structured outputs is currently not supported for reasoning models

Feel free to ignore if none of these address your specific case.

@ru-aish

@ru-aish just to confirm you are using claude-3.7-sonnet-thought correct?

I get errs w/ it too so I can help investigate this

Yep it claude-3.7-sonnet-thought used through copilot auth.

gotcha ill look into it

Got a similar error message when I want to use this model too (without any configuration override):

AI_APICallError: messages.1.content.0.type: Expected `thinking` or `redacted_thinking`, but found `text`. When `thinking` is enabled, a final `assistant` message must start with a thinking block (preceeding the lastmost set of `tool_use` and `tool_result` blocks). We recommend you include thinking blocks from previous turns. To avoid this requirement, disable
`thinking`. Please consult our documentation at https://docs.anthropic.com/en/docs/build-with-claude/extended-thinking

I wanted to use it in build mode.

This also affects Sonnet 4 & Opus 4.1
Not just Sonnet 3.7.

Not only CoPilot but also directly via Anthropic.

@Sewer56

@Sewer56 the only model I get this error with is sonnet 3.7 thought through copilot , are you getting this error with other models?

@rekram1-node

@rekram1-node Yes, I've observed it in both of the current Claude 4 models (anthropic/claude-sonnet-4-20250514, anthropic/claude-opus-4-1-20250805) . Both on Copilot and Anthropic API. That's why I commented, as I figured it may be worth mentioning that the scope is larger than before stated.

Can you provide a share link? I can use sonnet 4 with thinking just fine:
https://opencode.ai/s/KUzNz8HR

Do you have any special config?

This tends to happen most often during long context.

I dug out the last time it happened from my local history. It was here https://opencode.ai/s/I4nxRe6B#msg_93bd5e186001Ig0apIjqRFxmHI-0 (when I was doing work stuff, as opposed to hobby stuff).

(The error doesn't show in the share, so here it is)

That's really, really deep in- (sorry about that). Because the refinements weren't super complex I settled for auto-compact that one time 😅 .

I'm guessing it's somewhat related to Thinking -> Failed Tool Call.

ahh gotcha maybe a compact issue if it only happens during long context

It could be an auto-compact at a bad moment; that's not unthinkable.
According to URL, was 54th message since last compact.

Wish the share link shown token usages at each message, aaaa.

the share link does have tokens at each message it just isnt visible in ui, like when u share it makes a lil json object of the thread and it has tokens

This is fixed on latest I tested a bit seems fixed

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Git Copilot claude 3.7 sonnet thinking is not working in the opencode CLI #2305

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Git Copilot claude 3.7 sonnet thinking is not working in the opencode CLI #2305

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github-actions commented on Aug 29, 2025

rekram1-node commented on Aug 29, 2025

ru-aish commented on Aug 29, 2025

rekram1-node commented on Aug 29, 2025

fmatsos commented on Sep 11, 2025

Sewer56 commented on Sep 12, 2025

rekram1-node commented on Sep 12, 2025

Sewer56 commented on Sep 12, 2025

rekram1-node commented on Sep 12, 2025

Sewer56 commented on Sep 12, 2025

rekram1-node commented on Sep 12, 2025

Sewer56 commented on Sep 12, 2025

rekram1-node commented on Sep 12, 2025

rekram1-node commented on Sep 18, 2025

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