OpenAI: GPT-5.5
openai/gpt-5.5Created Apr 24, 2026|1M context context|Starting at $5/M input tokens|Starting at $30/M output tokens
GPT-5.5 is the latest frontier-grade model in the GPT-5 series, offering stronger agentic and long context perfomance compared to GPT-5.1. It uses adaptive reasoning to allocate computation dynamically, responding quickly to simple queries while spending more depth on complex tasks.
Built for broad task coverage, GPT-5.5 delivers consistent gains across math, coding, sciende, and tool calling workloads, with more coherent long-form answers and improved tool-use reliability.
Providers for GPT-5.5
Routes requests to the best providers that are able to handle your prompt size and parameters.
| Provider | Context Window | Max Output | Input Price | Output Price | Cache Read | Cache Write |
|---|---|---|---|---|---|---|
OpenAI | 1000K | 128K | $5 | $30 | $0.5 | — |