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fix(ai): clean up openai-codex models and token limits

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- Remove model aliases (gpt-5, gpt-5-mini, gpt-5-nano, codex-mini-latest, gpt-5-codex, gpt-5.1-codex, gpt-5.1-chat-latest)
- Fix context window from 400k to 272k tokens to match Codex CLI defaults
- Keep maxTokens at 128k (original value)
- Simplify reasoning effort clamping

closes #536
This commit is contained in:
Mario Zechner 2026-01-07 20:39:46 +01:00
parent d893ba7f20
commit 39fa25eb67
3 changed files with 11 additions and 8 deletions
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6
packages/ai/CHANGELOG.md
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@ -2,9 +2,13 @@
## [Unreleased]
### Breaking Changes
- Removed OpenAI Codex model aliases (`gpt-5`, `gpt-5-mini`, `gpt-5-nano`, `codex-mini-latest`, `gpt-5-codex`, `gpt-5.1-codex`, `gpt-5.1-chat-latest`). Use canonical model IDs: `gpt-5.1`, `gpt-5.1-codex-max`, `gpt-5.1-codex-mini`, `gpt-5.2`, `gpt-5.2-codex`. ([#536](https://github.com/badlogic/pi-mono/pull/536) by [@ghoulr](https://github.com/ghoulr))
### Fixed
- Fixed OpenAI Codex OAuth model list (removed aliases), aligned context window/maxTokens with observed backend limits, and refined reasoning effort clamping.
- Fixed OpenAI Codex context window from 400,000 to 272,000 tokens to match Codex CLI defaults and prevent 400 errors. ([#536](https://github.com/badlogic/pi-mono/pull/536) by [@ghoulr](https://github.com/ghoulr))
## [0.37.8] - 2026-01-07

3
packages/ai/scripts/generate-models.ts
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@ -447,8 +447,7 @@ async function generateModels() {
// Context window is based on observed server limits (400s above ~272k), not marketing numbers.
const CODEX_BASE_URL = "https://chatgpt.com/backend-api";
const CODEX_CONTEXT = 272000;
// Use the same max output token budget as Codex CLI.
const CODEX_MAX_TOKENS = 10000;
const CODEX_MAX_TOKENS = 128000;
const codexModels: Model<"openai-codex-responses">[] = [
{
id: "gpt-5.1",

10
packages/ai/src/models.generated.ts
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@ -2806,7 +2806,7 @@ export const MODELS = {
cacheWrite: 0,
},
contextWindow: 272000,
maxTokens: 10000,
maxTokens: 128000,
} satisfies Model<"openai-codex-responses">,
"gpt-5.1-codex-max": {
id: "gpt-5.1-codex-max",
@ -2823,7 +2823,7 @@ export const MODELS = {
cacheWrite: 0,
},
contextWindow: 272000,
maxTokens: 10000,
maxTokens: 128000,
} satisfies Model<"openai-codex-responses">,
"gpt-5.1-codex-mini": {
id: "gpt-5.1-codex-mini",
@ -2840,7 +2840,7 @@ export const MODELS = {
cacheWrite: 0,
},
contextWindow: 272000,
maxTokens: 10000,
maxTokens: 128000,
} satisfies Model<"openai-codex-responses">,
"gpt-5.2": {
id: "gpt-5.2",
@ -2857,7 +2857,7 @@ export const MODELS = {
cacheWrite: 0,
},
contextWindow: 272000,
maxTokens: 10000,
maxTokens: 128000,
} satisfies Model<"openai-codex-responses">,
"gpt-5.2-codex": {
id: "gpt-5.2-codex",
@ -2874,7 +2874,7 @@ export const MODELS = {
cacheWrite: 0,
},
contextWindow: 272000,
maxTokens: 10000,
maxTokens: 128000,
} satisfies Model<"openai-codex-responses">,
},
"openrouter": {