OpenAI
GPT-5.1 API prices by provider
openai/gpt-5.1
2 inference providers serve this exact model through OpenRouter. Input and output rates are paired per endpoint; route tags may identify a region or sub-endpoint whose eligibility is not yet verified.
- Active endpoints
- 5 / 5
- Lowest at 1M in + 1M out
- $5.625
- OpenAI · standard tier
- Context up to
- 400K
- Latest price change
- None yet
- Rates unchanged since first record 2026-09-29
| Provider · route | Tier | Input / 1M | Output / 1M | Cache read | Cache write | Context | Tools | 1M + 1M | Status | Price since |
|---|---|---|---|---|---|---|---|---|---|---|
OpenAI openai/flex · unknown | Standard | $0.625 | $5.00 | $0.0625 | — | 400K | Yes | $5.625 | Active | Since |
Azure azure · unknown | Standard | $1.25 | $10.00 | $0.13 | — | 400K | Yes | $11.25 | Active | Since |
OpenAI openai · unknown | Standard | $1.25 | $10.00 | $0.125 | — | 400K | Yes | $11.25 | Active | Since |
Azure azure/swedencentral · unknown | Standard | $1.375 | $11.00 | $0.143 | — | 400K | Yes | $12.38 | Active | Since |
OpenAI openai/fast · unknown | Standard | $2.50 | $20.00 | $0.25 | — | 400K | Yes | $22.50 | Active | Since |
“—” means no rate is published for that endpoint; it is excluded from estimates, not counted as zero. “Since” is the first record with no rate change observed; “Changed” is the latest observed rate or billing change. Per-request fees: not published for any endpoint here. Status is the upstream operational flag, not a measured uptime.