GLM 4.7 on Zai coding plan puts tool calls inside the thinking/reasoning tag.

[greggh]

Description

This happens to me about 15 times a day, and it forces me to start a new session because the session with that call in the thinking tag keeps happening and more errors and failures to call the right tools starts to happen.

Restarting in a new session it will go an hour or so before doing it again and needing a restart.

OpenCode version

1.0.223

Steps to reproduce

1. Choose Zai coding plan and give it your API Key.
2. Use GLM 4.7 for awhile.
3. It usually happens after context goes above 100k.

Screenshot and/or share link

Operating System

macOS 26.1

Terminal

Kitty

p.s. OpenCode is awesome.

[github-actions]

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

• Error "reasoning part reasoning-0 not found" from tool calls using GLM 4.5 Air #6486: Error "reasoning part reasoning-0 not found" from tool calls using GLM 4.5 Air

Both issues involve GLM models having problems with reasoning/thinking tags and tool calls, though with different error messages. Checking #6486 may provide additional context for understanding and fixing the issue.

Feel free to ignore if this doesn't address your specific case.

[arsham]

This is actually handy. I was wondering when we would see such thing. Basically during the reasoning phase, the model could use a tool call to enrich its reasoning.

[greggh]

This is actually handy. I was wondering when we would see such thing. Basically during the reasoning phase, the model could use a tool call to enrich its reasoning.

Definitely. I am not saying it's a horrible thing that it's calling a tool while reasoning, but isn't the best that the tool call doesn't actually happen and the session gets into a weird state for me.

[rekram1-node]

i think this is a bug on the zai side, how consistent is this?

[msmirnyagin]

@rekram1-node haha, Interleaved thinking
We support interleaved thinking by default (supported since GLM-4.5), allowing GLM to think between tool calls and after receiving tool results. This enables more complex, step-by-step reasoning: interpreting each tool output before deciding what to do next, chaining multiple tool calls with reasoning steps, and making finer-grained decisions based on intermediate results. https://docs.z.ai/guides/capabilities/thinking-mode

[rekram1-node]

@msmirnyagin we do send reasoning content back under the reasoning_content field, hmmm

Ill look

Only thing I see that may be an issue is “clear_thinking”: false but for the coding plan it says enabled by default hm

[rekram1-node]

@greggh anyway u could share a session this happened?

opencode export > session.json

Are you using any plugins that could be interferring?