OpenAI
GPT-5.1 Codex
GPT-5.1 Codex by OpenAI — compare inference API pricing across providers.
Input from
$1.25 / 1M tokens
across 1 provider
API Pricing
| Provider | Input / 1M | Output / 1M | Cached / 1M |
|---|---|---|---|
| $1.25 | $10.00 | $0.130 |
Prices updated daily. Last check: Aug 30, 2026
GPT-5.1 Codex pricing by provider
Input, output, and batch rates, plus alternatives, for one provider at a time.
Performance & Benchmarks
Source: Artificial Analysis →Intelligence
35.6 / 100
Math
95.7 / 100
Reasoning & Knowledge
- MMLU-Pro86.0%
- GPQA Diamond86.0%
- Humanity's Last Exam25.7%
Coding
- LiveCodeBench84.9%
- SciCode40.2%
Math
- AIME 202595.7%
Agentic & Tool Use
- Terminal-Bench Hard34.8%
- τ²-bench83.0%
Instruction & Long Context
- IFBench70.0%
- Long-Context Reasoning69.0%
Benchmarks measured Aug 2026. Scores are independent evaluations, not vendor-reported.
Model Details
General
- Creator
- OpenAI
- Modalities
- Text
Capabilities
- Tool Calling
- No
- Open Source
- No