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[Bug]: Auto-generated commits fail when user lacks access to hardcoded gpt-5.3-codex model #1165
Description
Before submitting
- I searched existing issues and did not find a duplicate.
- I included enough detail to reproduce or investigate the problem.
Area
apps/server
Steps to reproduce
- Start the T3 Code app.
- Open a project with unstaged/staged Git changes.
- Select a specific model in the chat UI model picker at the bottom (e.g.,
gpt-5.2-codex). - Click the "Auto Commit" or "Commit & Push" button in the Git actions block.
Expected behavior
The auto-generated commit message should be created using the model selected in the chat UI (gpt-5.2-codex), as that is what the user has chosen and verified they have access to.
Actual behavior
The app ignores the selected model and attempts to generate the commit message using a hardcoded gpt-5.3-codex model.
Impact
Major degradation or frequent failure
Version or commit
main
Environment
Provider/Model: Codex (gpt-5.3-codex hardcoded, user attempted gpt-5.2-codex)
Logs or stack traces
// The model is currently hardcoded in apps/server/src/git/Layers/CodexTextGeneration.ts
const CODEX_MODEL = "gpt-5.3-codex";
// ...
yield* childProcess.spawn("codex", [
"prompt",
"--model",
CODEX_MODEL, // Hardcoded, ignores the model selected in the chat UI
// ...Screenshots, recordings, or supporting files
Workaround
Currently, the only workaround is to manually type the commit messages instead of relying on the auto-generate button, or use the chat to write the commit message and copy-paste it.
Activity
AriajSarkar commentedon Mar 17, 2026
Another thought: considering
cost and usage limits,we should probably default to the
lowest-costmodel (based on theuser's provider) that has anadequate context window.Since this is just for generating
commit messages, we don't necessarily needtop-tier modelsfor this specific task.re: For example, if the user is using a heavy codex model (e.g. gpt-5.4 on xhigh) for chat,
we should use a lower-cost/faster model (e.g. gpt-5.4-mini,
⚠️ if it exists in the codex CLI!) for git commits.fix(git): use user-selected model for auto-generated commit messages
[-][Bug]: Auto-generated commit messages use hardcoded `gpt-5.3-codex` model instead of respecting chat selection[/-][+][Bug]: Auto-generated commits fail when user lacks access to hardcoded gpt-5.3-codex model[/+]UtkarshUsername commentedon Mar 18, 2026
Fixed by #1171