GPT-5.5 Pro
GPT-5.5 Pro API pricing is $30 per million input tokens and $180 per million output tokens.
- Provider
- OpenAI
- API model name
- gpt-5.5-pro
- Status
- Previous generation
- Input, $ per 1M tokens
- $30.00
- Output, $ per 1M tokens
- $180.00
- Sample request (10K in, 2K out), $
- $0.66
- Context window, tokens
- 1.05M
- Price checked on
- Official pricing page
- developers.openai.com
These are standard rates on OpenAI’s own API. A request with 10,000 input tokens and 2,000 output tokens costs about $0.66 before caching or batch discounts. The API model name is gpt-5.5-pro, and the context window is 1.05M tokens. OpenAI’s current GPT-6 Astra runs the same request for about $0.20.
- Max output, tokens
- 128K
- Input types
- Text, image, file
- Open weights
- No
- Long-context pricing
- $60 input, $270 output
- Sources
Page URL Checked OpenAI API pricing https://developers.openai.com/api/docs/pricing 2026-10-21 OpenAI GPT-5.5 Pro model page (prices) https://developers.openai.com/api/docs/models/gpt-5.5-pro 2026-09-30 OpenRouter model listing (context and output limits) https://openrouter.ai/models 2026-09-29
Questions
How much does the GPT-5.5 Pro API cost?
GPT-5.5 Pro costs $30 per million input tokens and $180 per million output tokens on OpenAI’s own API.
What is the API model name for GPT-5.5 Pro?
Use
gpt-5.5-pro in API calls to OpenAI. The context window is 1.05M tokens, and a response can run to 128,000 output tokens.What does one GPT-5.5 Pro request cost?
A request with 10,000 input tokens and 2,000 output tokens costs about $0.66 at standard rates, before caching or batch discounts.
Does GPT-5.5 Pro cost more for long prompts?
Yes. OpenAI lists long-context rates per million tokens: $60 input, $270 output.
Sources
Prices are read from each provider’s official pricing page: OpenAI, Anthropic, Google Gemini API, xAI, DeepSeek and Mistral AI. Context and output limits that a provider does not publish come from OpenRouter’s model listing. Each model’s Sources field lists the pages used and the date each was checked. How we check prices · Price change log