GPT-5.3-Codex
active Active
GPT-5.3-Codex is an active OpenAI LLM API model. As of May 24, 2026 it has no announced deprecation or retirement date.
Lifecycle & specs
- Provider
- OpenAI
- API model ID
gpt-5.3-codex- Status
- active
- Released
- Feb 24, 2026
- Context window
- 400,000 tokens
- Input price
- $1.75 / 1M tokens
- Output price
- $14.00 / 1M tokens
- Pricing checked
- May 22, 2026
Source: official OpenAI documentation ↗ · pending verification