kshitij 9ee9a4297d docs(codex-spark): document ChatGPT Pro entitlement gating ...

PR #12994 stripped gpt-5.3-codex-spark on the assumption that it was
unsupported. It's actually research-preview, ChatGPT-Pro-only, exposed
via the Codex OAuth backend at chatgpt.com/backend-api/codex/models —
not via the public OpenAI API.

Add explanatory comments in:
  - DEFAULT_CODEX_MODELS / _FORWARD_COMPAT_TEMPLATE_MODELS (codex_models.py)
  - _CODEX_OAUTH_CONTEXT_FALLBACK (model_metadata.py)
  - list_authenticated_providers' live-discovery branch (model_switch.py)

so future maintainers don't strip the entry again. Also documents the
intentional asymmetry that Spark stays out of the "openai" provider
catalog (it isn't on the public API) and why the supported_in_api
filter is *not* applied for the openai-codex route.

2026-05-09 23:17:25 -07:00

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