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Same provider/model with different variants #25248
Description
Question
Hi. Is it possible to switch the model variant between plan and build agents while I use the same provider/model for both plan and build agents?
Expected behavior: when pressing tab, I would expect to change the variant.
Real behavior: the last used variant is applied. So I have to manually change the variant each time I switch between agents.
My config:
{
"$schema": "https://opencode.ai/config.json",
"default_agent": "plan",
"agent": {
"plan": {
"model": "openai/gpt-5.5",
"variant": "high"
},
"build": {
"model": "openai/gpt-5.5",
"variant": "medium"
}
}
}
OpenCode version
1.15.10
I use built-in variants for the openai provider.
Based on my experiments, the expected behavior I described above is applied when using different providers. But since I use openai provider for everything, the last active variant is used, and the configuration in config.json is ignored in this case.
Is this behavior expected? Or do I have just a skill issue, and it's actually possible to achieve my goal?
Thank you for your help!
Activity
github-actions commentedon May 1, 2026
This issue might be a duplicate of existing issues. Please check:
reasoningEffort/variant settings, where the per-agent config appears to be ignored and the last-used value is applied instead.rekram1-node commentedon Jun 23, 2026
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