All models
OpenAI
GPT-5.5 Pro
The top GPT-5.5: reasoning, images, code
This model is not in the catalog right now.
See available modelsAbout the model
GPT-5.5 Pro is the top model in the GPT-5.5 lineup from OpenAI for the most complex tasks. It lays out deep step-by-step reasoning, follows complex instructions and works confidently with images and code. It supports tool calling (function-calling) and a very large context of up to ~1M tokens: lengthy documents and entire codebases fit into a single request. It answers well in Russian. It suits cases where the quality and reliability of the answer matter more than price and latency.
Strengths
- Deep step-by-step reasoning
- Text and images as input
- Tool calling (function-calling) for agents
- Very large context, up to ~1M tokens
- Strong with code and algorithms
- Answers well in Russian
Where to use it
- Complex analytics, research and planning
- Agent scenarios with tool calling
- Development, code review and code explanation
- Analysis of large documents, images and diagrams
- Assistants for expert tasks
- Translation and structuring of lengthy materials