OpenAI🚀 Flagship
GPT-5.1
Previous flagship model
💰 Pricing
Per million tokens (USD)
Input$1.25
Output$10.00
Cached Input
$0.12590% savings
Last updated: 2026-02-06
📊 Specifications
Context Window400.0K
Max Output32.0K
Features
VisionFunction CallingStreamingJSON Mode
🔗 Official Resources
📈 Price Comparison
Compare with similar models
| Model | Input | Output | vs GPT-5.1 |
|---|---|---|---|
GPT-5.1Current | $1.25 | $10.00 | — |
| Gemini 2.5 Pro | $1.25 | $10.00 | — |
| Gemini 3 Pro Preview | $2.00 | $12.00 | +20% |
| Claude Sonnet 4.5 | $3.00 | $15.00 | +50% |
| Claude Sonnet 4 | $3.00 | $15.00 | +50% |
| DeepSeek V3 | $0.30 | $1.20 | -88% |
🧮 Example Costs
Typical use case estimates
Single Request
$0.0063
1.0K in / 500 out
1K Requests/day
$6.25
1.0M in / 500.0K out
10K Requests/day
$62.50
10.0M in / 5.0M out