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GPT-5.5
openai/gpt-5.5
OrganizationOpenAI
FamilyGPT
Released2026-04-23
Context window1.1M
Max output128K
Modalities
ImageInputTextInputTextOutput
ProvidersCrossModel, Poe, Vivgrid, NanoGPT, FastRouter, NEAR AI Cloud, DaoXE, LLM Gateway, Kenari, OpenCode Zen, GitHub Copilot, UnoRouter, FrogBot, SAP AI Core, Pioneer, AI-ROUTER, ZenMux, Abacus, Azure Cognitive Services, Model Oracle AI, Azure, AIHubMix, Ofox, OrcaRouter, GMI Cloud, FreeModel, Kilo Gateway, Merge Gateway, Vercel AI Gateway, OpenRouter, Cloudflare AI Gateway, Perplexity Agent, OpenAI, Xpersona, HPC-AI
WeightsClosed
Attachments
Native
Reasoning
Native
Parameters: reasoning, include_reasoning, reasoning_effort
Tool call
Native
Parameters: tools, tool_choice
Structured
Native
Parameters: structured_outputs, response_format
Temperature-
Open weight-
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