Most advanced reasoning model with complete tool integration and visual perception capabilities. Achieves state-of-the-art performance on complex benchmarks including 71.7% on SWE-bench Verified and comprehensive support for multi-step problem solving.
- State-of-the-art reasoning achieving 71.7% SWE-bench Verified and 87.7% GPQA Diamond
- Complete tool integration with web search, file analysis, Python execution, and image generation
- Visual reasoning capabilities with advanced chain-of-thought processing for images and documents
- Multi-step problem solving excelling in mathematics, coding, science, and complex analysis
- Versatile application support ideal for technical writing and solving complex multi-step problems
Web Search
Search the web for current info.
JSON Mode
Output responses in valid JSON format.
Image Generator
Generate images from text prompts.
Model Information
Supported Formats
GPT 5.5OpenAI's most advanced model released April 2026. GPT-5.5 is recommended for most reasoning workloads, combining frontier intelligence with configurable reasoning effort (none → xhigh). Available in API, Codex, and ChatGPT.
GPT 5.5 ProHighest-intelligence API option in the GPT-5.5 family. Use for the most challenging problems that require maximum reasoning depth and can tolerate higher latency. Supports full reasoning effort range from none to xhigh.
GPT 5.4GPT-5.4 is OpenAI's frontier model for complex professional work, designed for agentic, coding, and professional workflows with the highest reasoning capability. Features a 1.05M token context window, native computer use, and built-in support for web search, file search, and MCP.