[FEATURE]: Same model for all agents

[ravshansbox]

Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

Do we have a config option to prevent model switching when agent is switched?

[github-actions]

This issue might be a duplicate or related to existing issues. Please check:

• Server API ignores agent's configured model when only agent parameter is passed #7099: Server API ignores agent's configured model when only agent parameter is passed
• Subagent with specific model results in model change in build and plan mode #6636: Subagent with specific model results in model change in build and plan mode
• Plugins using noReply seem to cause model to switch to agent default  #4475: Plugins using noReply seem to cause model to switch to agent default
• [Bug] Primary agents lack identity awareness when user switches agents - cannot determine which agent is active #7492: Primary agents lack identity awareness when user switches agents
• feat: Support default variant configuration per agent #7138: Support default variant configuration per agent

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

[m10rten]

You can give each agent the same model in the config if that is what you are looking for.
Am not aware of a config option to keep model the same always, imo that would default the purpose of the model property in the agents.

[bukanpeneliti]

do you mean this?

{
"$schema": "https://opencode.ai/config.json",
"agent": {
"build": {
"mode": "primary",
"model": "anthropic/claude-sonnet-4-20250514",
"prompt": "{file:./prompts/build.txt}",
"tools": {
"write": true,
"edit": true,
"bash": true
}
},
"plan": {
"mode": "primary",
"model": "anthropic/claude-haiku-4-20250514",
"tools": {
"write": false,
"edit": false,
"bash": false
}
},
"code-reviewer": {
"description": "Reviews code for best practices and potential issues",
"mode": "subagent",
"model": "anthropic/claude-sonnet-4-20250514",
"prompt": "You are a code reviewer. Focus on security, performance, and maintainability.",
"tools": {
"write": false,
"edit": false
}
}
}
}

[ravshansbox]

@bukanpeneliti no, I do not want to hardcode a model in config, because often switch them. But I want to use the same model for plan and build. Currently it remembers separate model for every agent, I want to opt out of that feature.

[ravshansbox]

Sorry, this looks like only a case when you switch model on both agents. If you switch model only in plan mode and then switch to build mode, then it is using the same model. So, for me it's currently not an issue, I will use plan mode for switching the model (I usually switch the model only in plan mode anyway). The issue can be closed.

[m10rten]

@ravshansbox ticket owner can close the ticket.

[ravshansbox]

@m10rten I know, I was not sure if the solution fits everyone, maintainers may want to work on it

[lshariprasad]

EXACT GitHub Comment to Close #7613:

@ravshansbox @m10rten @thdxr @bukanpeneliti

If you switch model only in plan mode and then switch to build mode, then it is using the same model... The issue can be closed.

plan mode - Change model firstSwitch to build mode - Uses same model automatically.

opencode - plan - pick model - switch to build