OpenCode does not persist thinking blocks for Claude Opus 4.7

[renbou]

Description

Claude Opus 4.7 omits thinking block contents by default: https://platform.claude.com/docs/en/about-claude/models/whats-new-claude-4-7#thinking-content-omitted-by-default

Setting a display: summary override does nothing - the thinking blocks are still hidden. However, the key problem is that this affects the agent not purely UI-wise: thinking blocks are not persisted in any way, meaning the agent cannot see thinking blocks from past turns. This makes the model pretty much unusable in OpenCode as it severely degrades its performance.

Plugins

No response

OpenCode version

1.4.6

Steps to reproduce

Add Claude Opus 4.7 to your config, try prompting the model to think across several tool calls, then on the next turn ask it to recall whether any thinking blocks are available

Screenshot and/or share link

No response

Operating System

No response

Terminal

No response

[github-actions]

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

• Assistant messages missing thinking block in conversation history when extended thinking is enabled #20427: Assistant messages missing thinking block in conversation history when extended thinking is enabled
• Thinking blocks in assistant messages are modified/dropped, causing API error on multi-turn conversations #18254: Thinking blocks in assistant messages are modified/dropped, causing API error on multi-turn conversations
• fix: thinking block signature lost when model differs, breaking multi-turn with extended thinking #22813: Thinking block signature lost when model differs, breaking multi-turn with extended thinking

If your issue is specifically about Opus 4.7's new default behavior of omitting thinking block contents (as documented by Anthropic), and it's distinct from the above, please clarify the difference so maintainers can track it separately.

[rekram1-node]

If u use our variants in latest release they will be shown, also I think the blocks are persisted but only reasoning signatures not the summaries, so no impact to model perf but it does affect ur ux as a user

[NamedIdentity]

Was going crazy trying to figure out why thinking blocks were missing.

[cjnoname]

I still got the same issue if I switch the model from Bedrock Claude 4.7 to ChatGPT 5.4, even with this new version.

[rekram1-node]

@cjnoname not sure i follow

[cjnoname]

@cjnoname not sure i follow

Thanks for the follow mate.

It’s very easy to reproduce.

First, ask “hello” in Bedrock Opus 4.7 (Build Mode).
Then switch to Plan Mode and ask “hello” in Copilot ChatGPT 5.4.
Next, switch back to Build Mode and ask “hello” again in Bedrock Opus 4.7.

You will then get the following error:

undefined: The model returned the following errors: {"type":"error","request_id":"req_wjzpzhh5jmyfkj5es5v7j3iuuf6z5ffciivto5idzqqdilm7ruta","error":{"type":"invalid_request_error","message":"messages.3.content.0.thinking.signature: Field required"}}

We use it everyday in this way and it only happens after we upgraded Opus to 4.7

[rekram1-node]

ahh okay i see why, ai sdk has inconsistent behaviors foir different providers. Should be an easy fix here

[cjnoname]

ahh okay i see why, ai sdk has inconsistent behaviors foir different providers. Should be an easy fix here

Thanks dude. It would be very helpful for us :)

[cjnoname]

ahh okay i see why, ai sdk has inconsistent behaviors foir different providers. Should be an easy fix here

Any chance for fixing this one mate? It's really a pain to use right now

[rekram1-node]

yeah i shall

[cjnoname]

yeah i shall

It works now :) Tons of thanks