OpenAI
Available in Shortly AI
GPT 5.3 Codex
Released February 5, 2026
ReasoningVision (Image)Tool Use
GPT-5.3-Codex advances both the frontier coding performance of GPT‑5.2-Codex and the reasoning and professional knowledge capabilities of GPT‑5.2, together in one model, which is also 25% faster. This enables it to take on long-running tasks that involve research, tool use, and complex execution.
- Context window
- 400K tokens
- Maximum output
- 128K tokens
- Input pricing
- $1.75/M
- Output pricing
- $14.00/M
Independent benchmark
LiveBench historical snapshot
71.6overall
Historical benchmark data from LiveBench, release 2026-01-08. Scores are pinned and are not fetched on page load.
71.4
77.5
66.7
85.7
49.7
79.2
71.3
| Category | Score |
|---|---|
| Reasoning | 71.423 |
| Coding | 77.480 |
| Agentic Coding | 66.667 |
| Mathematics | 85.700 |
| Data Analysis | 49.679 |
| Language | 79.180 |
| Instruction Following | 71.342 |
Benchmarks measure selected evaluation tasks and do not guarantee performance for every prompt or workflow.
FAQ
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