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fix: update Codex default model to gpt-5.3-codex and add agent model reference (#2540)

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The previous PR (#2536) set the Codex default to gpt-5.1-codex, but the
latest available on OpenRouter is gpt-5.3-codex. Also adds a rules file
documenting each agent's default model to prevent future regressions.

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Co-authored-by: L <6723574+louisgv@users.noreply.github.com>
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Ahmed Abushagur 2026-03-12 15:49:19 -07:00 • committed by GitHub
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23
.claude/rules/agent-default-models.md Normal file
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@ -0,0 +1,23 @@
# Agent Default Models
**Source of truth for the default LLM each agent uses via OpenRouter.**
When updating an agent's default model, update BOTH the code and this file. This prevents regressions from stale model IDs.
Last verified: 2026-03-12
| Agent | Default Model | How It's Set |
|---|---|---|
| Claude Code | _(routed by Anthropic)_ | `ANTHROPIC_BASE_URL=https://openrouter.ai/api` — model selection handled by Claude's own routing |
| Codex CLI | `openai/gpt-5.3-codex` | Hardcoded in `setupCodexConfig()` → `~/.codex/config.toml` |
| OpenClaw | `openrouter/openrouter/auto` | `modelDefault` field in agent config; written to OpenClaw config via `setupOpenclawConfig()` |
| ZeroClaw | _(provider default)_ | `ZEROCLAW_PROVIDER=openrouter` — model selection handled by ZeroClaw's OpenRouter integration |
| OpenCode | _(provider default)_ | `OPENROUTER_API_KEY` env var — model selection handled by OpenCode natively |
| Kilo Code | _(provider default)_ | `KILO_PROVIDER_TYPE=openrouter` — model selection handled by Kilo Code natively |
| Hermes | _(provider default)_ | `OPENAI_BASE_URL=https://openrouter.ai/api/v1` + `OPENAI_API_KEY` — model selection handled by Hermes |
| Junie | _(provider default)_ | `JUNIE_OPENROUTER_API_KEY` — model selection handled by Junie natively |
## When to update
- When OpenRouter adds a newer version of a model (e.g., `gpt-5.1-codex` → `gpt-5.3-codex`)
- When an agent changes its default provider integration
- Verify the model ID exists on OpenRouter before committing: `curl -s https://openrouter.ai/api/v1/models | jq '.data[].id' | grep <model>`

2
packages/cli/src/shared/agent-setup.ts
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@ -275,7 +275,7 @@ export async function offerGithubAuth(runner: CloudRunner): Promise<void> {
async function setupCodexConfig(runner: CloudRunner, _apiKey: string): Promise<void> {
logStep("Configuring Codex CLI for OpenRouter...");
const config = `model = "openai/gpt-5.1-codex"
const config = `model = "openai/gpt-5.3-codex"
model_provider = "openrouter"
[model_providers.openrouter]