Openai
GPT-5.5
Context Window
512K tokens
Speed Tier
Balanced — good speed with strong quality
Reasoning
Supported
Vision
Supported
Capabilities
reasoningcodestructured-outputmultimodallong-context
Best For
- ✓reasoning — Complex multi-step reasoning for logic, math, and analysis tasks.
- ✓code — Code generation, debugging, and explanation across programming languages.
- ✓structured output — Reliable JSON and structured data output generation.
- ✓multimodal — Processing text, images, and other input modalities together.
- ✓long context — Handling very large documents and extended conversations.
Other Openai Models
Compare GPT-5.5
Prompt Optimization Notes
GPT models respond best to explicit, structured instructions with clear output formatting. Use system prompts for role specification and step-by-step reasoning for complex tasks.