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ACP doesn't respect default model from opencode.json config #21556
Description
Description
I have this config on ~/.config/opencode/opencode.json:
{
"$schema": "https://opencode.ai/config.json",
"model": "openai/gpt-5.4",
"agent": {
"build": {
"model": "openai/gpt-5.4",
"variant": "high"
},
"plan": {
"model": "openai/gpt-5.4",
"variant": "low"
}
}
}When I run opencode on the terminal, the default model loads correctly. However on ACP (zed), the default model variant is not respected:
I would expect OpenAI/GPT-5.4 (high) to load, since it's my default variant when using the build agent
Plugins
No response
OpenCode version
1.3.13
Steps to reproduce
- Put this on your
opencode.jsonconfig:
{
"$schema": "https://opencode.ai/config.json",
"model": "openai/gpt-5.4",
"agent": {
"build": {
"model": "openai/gpt-5.4",
"variant": "high"
},
"plan": {
"model": "openai/gpt-5.4",
"variant": "low"
}
}
}- Open an ACP client (for example Zed)
- The default model variant is not respected
Screenshot and/or share link
No response
Operating System
Arch Linux
Terminal
acp
Reacted by Furkan Çakır, Raphael Taylor-Davies, jcranch-atlas, Felix Blaschke, Milind Bumbu and Alvaro Parker
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[-]ACP doesn't respect default model on from `opencode.json` config[/-][+]ACP doesn't respect default model from `opencode.json` config[/+]github-actions commentedon Apr 8, 2026
This issue might be a duplicate of existing issues. Please check:
opencode.jsonnot respected when using ACP (Zed)If your issue is specifically about the agent variant (e.g.,
high/low) not being applied (rather than just the model itself), it may still warrant a separate report, but please check the above issues first.rekram1-node commentedon May 7, 2026
should be fixed:
#25663