GPT-5.3 Codex
Current · Released: January 22, 2026
- Context window
- 400.000 tokens
- Max output
- 16.384 tokens
- Price input / 1M tokens
- $1.75
- Price output / 1M tokens
- $14.00
- Price cache-read / 1M
- $0.18
Capabilities
- Code
- Agent workflow
- Tool use
Benchmark scores
- AIME 2025
- 94.0
- GPQA Diamond
- 73.8
- SWE-bench Pro
- 56.8
- OSWorld-Verified
- 64.7
- Terminal-Bench 2.0
- 77.3
Notes
Coding-focused variant from the GPT-5.3 line. Same pricing as gpt-5.2. Source: openrouter.ai.