GPT-5.5 Pro: API pricing, providers and specs
GPT-5.5 Pro is a text model by OpenAI. 17 providers serve it, from $144 to $190.44 /1M; the lowest price is at CometAPI.
How GPT-5.5 Pro compares
Against the 737 text models on the site priced the same way.
- Pricey for its class: at $144 /1M, its lowest price is above 100% of comparable models (median $1.10).
- Its 1.05M-token context window is larger than 95% of them (median 262K), about 1580 pages of text.
- 17 providers serve it; 86% of comparable models have fewer.
GPT-5.5 Pro prices by provider
Every provider's list price, read from its own price page or API. A price marked “from” changes with context length, resolution or mode.
| Provider | Input | Output | Prompt caching | Context |
|---|---|---|---|---|
 CometAPI | $24/1M | From$144/1M | — | — |
| OpenAIOfficial | $30/1M | From$180/1M | — | — |
| ZenMux | $30/1M | From$180/1M | — | 1.05M |
 CrossModel | $30/1M | From$180/1M | $30/1M | — |
 Requesty | $30/1M | From$180/1M | — | 1.05M |
 Venice AI | $30/1M | $180/1M | — | — |
| OpenCode | $30/1M | $180/1M | $30/1M | — |
 FastRouter | $30/1M | From$180/1M | — | 1.05M |
 OrcaRouter | $30/1M | $180/1M | — | — |
| Vercel AI Gateway | $30/1M | From$180/1M | — | 1M |
 AIHubMix | $30/1M | From$180/1M | — | 1.05M |
 Impossibl | $30/1M | From$180/1M | $3/1M | — |
| OpenRouter | $30/1M | From$180/1M | — | 1.05M |
| DevPass (LLM Gateway) | $30/1M | From$180/1M | — | — |
 APIYI | $30/1M | $180/1M | — | — |
 Jiekou.AI | $30/1M | $180/1M | — | — |
| AI/ML API | $31.74/1M | $190.44/1M | — | — |
- CometAPIFrom$144
- Venice AI$180
- OpenCode$180
- OrcaRouter$180
- APIYI$180
- Jiekou.AI$180
- OpenAIOfficialFrom$180
- ZenMuxFrom$180
- CrossModelFrom$180
- RequestyFrom$180
- FastRouterFrom$180
- Vercel AI GatewayFrom$180
Specs
- Type
- Text
- Maker
- OpenAI
- Inputs
- Image, Text
- Outputs
- Text
- Context
- 1.05M≈ 1580 pages of text
- Max output
- 128K
- Capabilities
- JSON, Reasoning, Tool calling, Vision
- Released
- Apr 24, 2026
- License
- —
- Open weights
- —
Alternatives to GPT-5.5 Pro
Same kind of model from other makers, at a similar price.
| Model | Lowest price | Context | Arena | Providers |
|---|---|---|---|---|
| GPT-5.5 Prothis model | $144/1M | 1.05M | — | 17 |
| Claude 3 Opus | $75/1M | — | 1262 | 2 |
| Claude Mythos 5.1 | $50/1M | — | — | 2 |
| Claude Mythos Preview | $137.50/1M | — | — | 1 |
| Claude Opus 4.1 | $75/1M | 200K | — | 10 |
| Claude Opus 4 | $75/1M | 200K | 1377 | 4 |
More from OpenAI
GPT-5.5 Pro FAQ
CometAPI, at $144 /1M. 17 providers serve GPT-5.5 Pro; the table above lists every one with its price.
GPT-5.5 Pro reads up to 1.05M tokens per request and writes up to 128K.
We have not found GPT-5.5 Pro's weights published by its maker.
17 API providers serve GPT-5.5 Pro. Compare their prices above, or open a provider to see everything it offers.
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