What the evidence says
These facts come from the reviewed Epoch AI catalog artifact and its linked primary record. They describe the model. They do not rank it.
- Developer [1]
- OpenAI
- Released [1]
- February 5, 2026
- Domains [1]
- Language
- Tasks [1]
- Language modeling/generation
- Access [1]
- API access
- Weights [1]
- Closed
Where it may fit
These are evidence-bounded screening suggestions, not performance claims or purchase recommendations.
Hosted language generation on OpenAI's API
Consider it for applications that generate language through OpenAI's hosted API where managed access fits the deployment.
Evidence fields: tasks, access [1]
Codex-line evaluation
Consider it when evaluating OpenAI's Codex-branded releases; the name identifies the line, and the record documents language generation.
Evidence fields: name, tasks [1]
Limitations
The source record lists only language modeling and generation. It does not document coding tasks, benchmark results, price, context window, latency, or safety evaluations, and no exact-match Arena rating exists for this record.
Current standing
According to the LMArena snapshot published July 12, 2026, no exact match for this catalog record appears in the style-controlled text category, so this page reports no current rating for GPT-5.3 Codex.