GPT-5.1 pricing
GPT-5.1 is the latest frontier-grade model in the GPT-5 series, offering stronger general-purpose reasoning, improved instruction adherence, and a more natural conversational style compared to GPT-5. It uses adaptive reasoning to allocate computation dynamically, responding quickly to simple queries while spending more depth on complex tasks. The model produces clearer, more grounded explanations with reduced jargon, making it easier to follow even on technical or multi-step problems. Built for. Live index: 6 priced offers. Best input $1.25 per million tokens from Gmi. Best output $10.00 per million tokens from Gmi.
Pricing across providers
All figures are list prices per million tokens unless a column says otherwise. 6 offers are listed for GPT-5.1. Best input in this view: Gmi.
| Provider | Input / 1M | Output / 1M | Cached input | Batch |
|---|---|---|---|---|
A Azure | $1.38 | $11.00 | $0.140 | — |
GC Github Copilot | N/A | N/A | — | — |
G Gmi | $1.25 | $10.00 | — | — |
O Openrouter | $1.25 | $10.00 | — | — |
O Openrouter | $1.25 | $10.00 | — | — |
O OpenAInative | $1.25 | $10.00 | $0.125 | — |
Input vs output · per provider
Cost calculator
Pick any of the providers above and type how many tokens you expect per day, week, or year. We turn that into rough dollar totals for GPT-5.1.
Provider
0.138000¢ / req
0.550000¢ / req
Model specifications
Context length, caps, and capability flags for GPT-5.1. Values follow the main provider (OpenAI) record in our index.
- Context window
- 272,000 tokens
- Max output
- 128,000 tokens
- Vision (images)
- Yes
- Tool / function calling
- Yes
- Streaming
- No
- Released
- Nov 2025
- Primary provider
- OpenAI
- Model family
- N/A
Compare GPT-5.1
Jump into a comparison when you want one table for two models instead of two tabs. 6 curated matches for GPT-5.1.
- GPT-5.1 vs GPT-4o
Same output pricing
- GPT-5.1 vs GPT-4o mini
GPT-4o mini 94% cheaper on output
- GPT-5.1 vs o3
o3 20% cheaper on output
- GPT-5.1 vs Claude Sonnet 4.6
GPT-5.1 33% cheaper on output
- GPT-5.1 vs Gemini 2.0 Flash
Gemini 2.0 Flash 96% cheaper on output
- GPT-5.1 vs Llama 3.1 70B
Compare pricing side by side
Frequently asked questions
Answers pull from the same numbers you see on this page. The short model note from our index: GPT-5.1 is the latest frontier-grade model in the GPT-5 series, offering stronger general-purpose reasoning, improved instruction adherence, and a more natural conversational style compared to GPT-5. It uses adaptive rea...
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