GPT-5.3 Codex
AI/ML API
GPT-5.3 Codex by AI/ML API costs $4.81 per 1M input tokens and $38.51 per 1M output tokens, with a 400K-token context window.
Pricing
Input (per 1M tokens)
$4.81
Output (per 1M tokens)
$38.51
Cached input (per 1M)
$0.48
Specifications
- Provider
- AI/ML API
- Context window
- 400K tokens
- Parameters
- —
- Released
- Feb 2026
- Open weights
- No
- Frontier model
- No
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FAQ
Pricing is per 1M tokens (USD); confirm with the provider before production use.