GPT-5.3 Codex
OpenAILanguage modeling/generation
GPT-5.3 Codex is a language modeling/generation model from OpenAI released in 2026.
LLM pricing & performance
Full LLM page →GPT-5.3 Codex is available via API — live cost, context, and benchmark data:
Input / 1M
$1.75
Output / 1M
$14.00
Context
400K
Tokens/sec
—
Details
- Provider
- OpenAI
- Task
- Language modeling/generation
- Released
- 2026-02-05
- Open weights
- No