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fix(ai): drop Codex models rejected for ChatGPT accounts (#11173)

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The openai-codex provider authenticates with a ChatGPT account, and the
Codex backend rejects gpt-5.5 and gpt-5.3-codex-spark for those accounts
("not supported when using Codex with a ChatGPT account"). Remove them
from the catalog so model pickers stop offering models that always fail.

Codex e2e tests that used openai-codex/gpt-5.5 now use gpt-6.1-sol, the
openai-codex default. The context overflow test uses gpt-5.6-sol to keep
its prompt smaller.

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Lucas Meijer 2026-10-20 15:55:48 +02:00 • committed by GitHub
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commit fdce48eb40
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21 changed files with 53 additions and 77 deletions
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29
packages/ai/scripts/generate-models.ts
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@ -3144,13 +3144,14 @@ async function generateModels() {
// OpenAI Codex (ChatGPT OAuth) models
// NOTE: These are not fetched from models.dev; we keep a small, explicit list to avoid aliases.
// Older model limits are based on observed server behavior; GPT-5.6 and GPT-6 use Codex's 272k default catalog limit.
// Only list models the Codex backend accepts for ChatGPT accounts. GPT-5.5 and GPT-5.3 Codex Spark are rejected
// with "not supported when using Codex with a ChatGPT account".
// GPT-5.6 and GPT-6 use Codex's 272k default catalog limit.
// GPT-6.1 Sol uses the 500k default returned by /backend-api/codex/models.
const CODEX_BASE_URL = "https://chatgpt.com/backend-api";
const CODEX_CONTEXT = 272000;
const CODEX_GPT_61_SOL_CONTEXT = 500000;
const CODEX_GPT_56_CONTEXT = 272000;
const CODEX_SPARK_CONTEXT = 128000;
const CODEX_MAX_TOKENS = 128000;
const codexModels: Model<"openai-codex-responses">[] = [
{
@ -3201,30 +3202,6 @@ async function generateModels() {
contextWindow: CODEX_CONTEXT,
maxTokens: CODEX_MAX_TOKENS,
},
{
id: "gpt-5.3-codex-spark",
name: "GPT-5.3 Codex Spark",
api: "openai-codex-responses",
provider: "openai-codex",
baseUrl: CODEX_BASE_URL,
reasoning: true,
input: ["text"],
cost: { input: 1.75, output: 14, cacheRead: 0.175, cacheWrite: 0 },
contextWindow: CODEX_SPARK_CONTEXT,
maxTokens: CODEX_MAX_TOKENS,
},
{
id: "gpt-5.5",
name: "GPT-5.5",
api: "openai-codex-responses",
provider: "openai-codex",
baseUrl: CODEX_BASE_URL,
reasoning: true,
input: ["text", "image"],
cost: withOpenAiLongContextPricing({ input: 5, output: 30, cacheRead: 0.5, cacheWrite: 0 }),
contextWindow: CODEX_CONTEXT,
maxTokens: CODEX_MAX_TOKENS,
},
{
id: "gpt-5.6-luna",
name: "GPT-5.6 Luna",