GPT-5.1
GPT-5.1 by OpenAI. Official list price: $1.25 per 1M input and $10 per 1M output tokens.
Official price benchmark
USD per 1M tokens
- input
- $1.25
- output
- $10.00
- cache read
- $0.125
Your budget
Input:output ratio · Similar amounts of input and output
Purchasing power ranking
$100 · GPT-5.1 · Balanced
Best price
RunAPI
−94%
providers
3
max −94%
Purchasing power ranking
The provider's published prices next to the vendor's official list.
| # | Provider | Input | Output | Cache | Uptime | Latency | Score | Tokens for budget | vs list |
|---|---|---|---|---|---|---|---|---|---|
| — | Official price | $1.25 | $10.00 | $0.125 | — | — | — | 17.8M | 0% |
| 1 | RunAPIdown · Nov 12, 2026 | $0.075 | $0.600 | $0.0075 | 90.4% | 989 ms | 85 | 296M | −94% |
| 2 | Crazyrouterdegraded · Nov 12, 2026 | $0.188 | $1.50 | $0.019 | 78.1% | 1.33 s | 72 | 119M | −85% |
| 3 | Polza.aioperational · Nov 12, 2026 | $0.919 | $7.35 | $0.092 | 100.0% | 471 ms | 98 | 24.2M | −26% |
Some links on this site are partner links. They do not affect prices or ranking. Uptime and latency come from our own GET /models probes every 30 minutes, not a guarantee that the model is available.
Cost estimate
What one request and a month of traffic cost at the selected provider.
per request
$0.0004
per month
$2.37
RunAPI · −94% · 1.20K / 500
Other models
Frequently asked questions
Answers are generated from the live quotes.
We collect GPT-5.1 prices two ways: the official OpenAI list and quotes from providers our crawler checks daily. Providers in our catalogue sell GPT-5.1 at $0.075 in / $0.600 out (94% below the official list). Everything is normalised to a blended cost at a chosen input:output ratio, so “GPT-5.1 price per 1M tokens” means the same thing on every page.
What does the GPT-5.1 API cost?
The official OpenAI list price is $1.25 per 1M input tokens and $10.00 per 1M output tokens. Cached input is $0.125 per 1M tokens, 10× cheaper than the regular input.
How much does 1 million tokens of GPT-5.1 cost?
1M input tokens cost $1.25, 1M output tokens — $10.00. With a 1:1 input/output load a million tokens works out to about $5.63. Chatbots with long context push the blended price down; code generation pushes it up.
Where is the GPT-5.1 API cheapest?
Our measurements show RunAPI as the lowest quote: 94% below the official list. Quotes from 3 providers refresh daily — see the table above.
What is the GPT-5.1 context window?
The context window is 400K tokens. Some vendors raise the price above a context threshold — check the plan notes.
How do I check that a provider key works?
The free checker sends a GET request to your endpoint's model list and reports status and latency. The key is not stored server-side.