OpenAI / coding
GPT-5.3 Codex family
This coding-labelled generation is documented as its own catalogue collection. Compare the exact Codex row and its endpoint constraints rather than assuming a general chat equivalent.
Family research reviewed · Official source notes below
- Standard models
- 1
- Independently rated
- 0 / 1
- Known token rates
- 1 / 1
- Global balanced frontier
- 0
This collection organises accepted catalogue identities. It does not certify equal weights, a shared licence, benchmark equivalence or current availability on every serving platform.
Compare exact catalogue rows
USD per 1M tokens. In / out are listed base rates; expand billing conditions before planning a request. LMArena scores measure the general preference board, not success on your engineering task. Unknown stays unknown.
Coding-specific checkpoints
| Model | LMArena | Input / output $/M | Context / max output | Capabilities & conditions |
|---|---|---|---|---|
GPT-5.3-Codexopenai/gpt-5.3-codex | Unrated | $1.75 / $14.00Listed base ratesBilling details
Tool, media, cache-write and service-tier charges may add dimensions. Read the full model evidence. | 400,000Output 128,000 | text · image · fileTools yes · reasoning yesClosed weightsReleased 2026-02-24 |
Sources and scope
- OpenAI model catalogue ↗
Exact named models on the vendor platform; not a promise about every reseller
Checked 2026-09-22 · official document opened and inspected
Source review does not refresh a price or transplant a benchmark score. Read the method and correction policy.
Questions this page answers
Are the GPT-5.3 Codex family models interchangeable?
No. These are exact catalogue rows with separate capability, pricing and rating evidence. Compare the checkpoint, serving endpoint, reasoning settings and required input types. A family name does not establish equivalent behaviour.
How many OpenAI rows are compared here?
1 standard rows, of which 0 have an accepted LMArena general score and 1 have known input and output token rates. 0 related free or batch variants are listed separately.
What do the prices and frontier counts mean?
Prices below are listed US dollars per million input or output tokens, before request-specific context tiers and other billing dimensions. The frontier count comes from the global balanced view. Neither a family price range nor a benchmark difference proves your task will be cheaper or more successful.
How current are the official notes?
The linked family research was reviewed 2026-09-22. That date is separate from each accepted catalogue observation and each vendor’s effective date. An official note applies to its named platform, not automatically to every reseller.