OpenAI: GPT-5.1-Codex
🇺🇸 OpenAI · GPT-5.1-Codex
Input Price $1.25 per million tokens NT$40.0
Output Price $10.00 per million tokens NT$320
Context Window 400K tokens Output limit: 128K
OpenRouter Route Price Please verify with official pricing pages
| Dimension | Unit | Price (USD) |
|---|---|---|
| Input | per 1M tokens | $1.25 |
| Output | per 1M tokens | $10.00 |
| Cached Input | per 1M tokens | $0.130 |
| Web Search | per search | $0.010 |
- Provider
- OpenAI (OpenAI)
- Model Family
- GPT-5.1-Codex
- Version String
- openai/gpt-5.1-codex
- Status
- active
- Modality
- text, image
- Context Window
- 400,000 tokens
- Output Limit
- 128,000 tokens
Index Metrics
Cross-domain capability indexes evaluated by Artificial Analysis — Artificial Analysis
Agentic Index 51 A Measured: 2026-05-27
Coding Index 37 B Measured: 2026-05-27
Intelligence Index 43 B Measured: 2026-05-27
Benchmark Scores
Data source: Artificial Analysis
AA-LCR 67.3% B Measured: 2026-05-27
GPQA Diamond 86.0% S Measured: 2026-05-27
HLE 23.4% A Measured: 2026-05-27
HLE 23.4% A Measured: 2026-05-27
IFBench 70.0% B Measured: 2026-05-27
MMMU Pro 72.5% B Measured: 2026-05-27
Non-Hallucination 25.6% Measured: 2026-05-27
Omniscience Accuracy 39.2% Measured: 2026-05-27
SciCode 40.2% B Measured: 2026-05-27
Tau2 83.0% Measured: 2026-05-27
TerminalBench 34.8% Measured: 2026-05-27
Performance Metrics
Real-world benchmarks, updated every 72 hours by Artificial Analysis — Artificial Analysis
First Token Latency 8.2s Measured: 2026-05-27
Output Speed 185 t/s Measured: 2026-05-27
Response Time 10.9s Measured: 2026-05-27
90-Day Price Trend
Input / Output price (USD per 1M tokens)
Past 90 days of records; every price change is shown here
| Date | Dimension | Price (USD) | Source |
|---|---|---|---|
| 2026-05-27 | Web Search | $0.010 | openrouter |
| 2026-05-27 | Cached Input | $0.130 | openrouter |
| 2026-05-27 | Output | $10.00 | openrouter |
| 2026-05-27 | Input | $1.25 | openrouter |
| 2026-05-26 | Web Search | $0.010 | openrouter |
| 2026-05-26 | Cached Input | $0.125 | openrouter |
| 2026-05-26 | Output | $10.00 | openrouter |
| 2026-05-26 | Input | $1.25 | openrouter |
| 2026-05-25 | Web Search | $0.010 | openrouter |
| 2026-05-25 | Cached Input | $0.125 | openrouter |
| 2026-05-25 | Output | $10.00 | openrouter |
| 2026-05-25 | Input | $1.25 | openrouter |
| 2026-05-24 | Web Search | $0.010 | openrouter |
| 2026-05-24 | Cached Input | $0.125 | openrouter |
| 2026-05-24 | Output | $10.00 | openrouter |
| 2026-05-24 | Input | $1.25 | openrouter |
| 2026-05-23 | Web Search | $0.010 | openrouter |
| 2026-05-23 | Cached Input | $0.125 | openrouter |
| 2026-05-23 | Output | $10.00 | openrouter |
| 2026-05-23 | Input | $1.25 | openrouter |
| 2026-05-22 | Web Search | $0.010 | openrouter |
| 2026-05-22 | Cached Input | $0.125 | openrouter |
| 2026-05-22 | Output | $10.00 | openrouter |
| 2026-05-22 | Input | $1.25 | openrouter |
| 2026-05-22 | Web Search | $0.010 | openrouter |
| 2026-05-22 | Cached Input | $0.125 | openrouter |
| 2026-05-22 | Output | $10.00 | openrouter |
| 2026-05-22 | Input | $1.25 | openrouter |
| 2026-05-21 | Web Search | $0.010 | openrouter |
| 2026-05-21 | Cached Input | $0.125 | openrouter |
| 2026-05-21 | Output | $10.00 | openrouter |
| 2026-05-21 | Input | $1.25 | openrouter |
| 2026-05-20 | Web Search | $0.010 | openrouter |
| 2026-05-20 | Cached Input | $0.125 | openrouter |
| 2026-05-20 | Output | $10.00 | openrouter |
| 2026-05-20 | Input | $1.25 | openrouter |
| 2026-05-19 | Cached Input | $0.125 | openrouter |
| 2026-05-19 | Output | $10.00 | openrouter |
| 2026-05-19 | Input | $1.25 | openrouter |
| 2026-05-18 | Cached Input | $0.125 | openrouter |
| 2026-05-18 | Output | $10.00 | openrouter |
| 2026-05-18 | Input | $1.25 | openrouter |
| 2026-05-17 | Cached Input | $0.125 | openrouter |
| 2026-05-17 | Output | $10.00 | openrouter |
| 2026-05-17 | Input | $1.25 | openrouter |
| 2026-05-16 | Cached Input | $0.125 | openrouter |
| 2026-05-16 | Output | $10.00 | openrouter |
| 2026-05-16 | Input | $1.25 | openrouter |
| 2026-05-16 | Cached Input | $0.125 | openrouter |
| 2026-05-16 | Output | $10.00 | openrouter |
Description
GPT-5.1-Codex is a specialized version of GPT-5.1 optimized for software engineering and coding workflows. It is designed for both interactive development sessions and long, independent execution of complex engineering tasks....
Key Insights
Key data points from this page for quick reference and citation.
- OpenAI: GPT-5.1-Codex Input price: $1.25/M tokens
- OpenAI: GPT-5.1-Codex Output price: $10/M tokens
- Context window: 400,000 tokens
- Provider: OpenAI
- Model family: GPT-5.1-Codex
- Modalities: text, image
- Data source: OpenRouter, updated daily