GPT-5.5 by OpenAI
OpenAI's smartest and most intuitive to use model yet
Visit website →About
GPT-5.5 is a model from OpenAI built to handle real-world work with more autonomy, speed, and efficiency. It is strong at coding, research, data analysis, and task execution: planning, using tools, and iterating with minimal guidance.
That makes it suited to complex, multi-step workflows where a model has to carry a task forward on its own rather than answer one prompt at a time.
It is aimed at developers and businesses building agents and AI features that need a capable, steerable model for demanding work, available through OpenAI's API and products.
AI-assisted draft, human-reviewed before publishing — see how we choose & review tools.
Why we picked it
GPT-5.5 made the cut for handling a task forward with minimal guidance rather than answering one prompt at a time — that autonomy is worth naming specifically for multi-step work where re-prompting after every small step is what actually slows a person down.
Related tools
- 1 Tiden Verifies coding agents built what you asked for — specs as code Trial
- 2 GitGlow Local Git workbench with smart review for your changes and agent edits Freemium
- 3 GitHub Copilot AI coding assistant inside your editor, with a free tier Freemium
- 4 Together Link Run frontier open models in the coding harness you already use Paid
- 5 Octri Turns OpenAPI specs into docs, SDKs in 10 languages, and MCP server Freemium
- 6 FastRouter.ai One OpenAI-compatible API to route across 200+ LLMs with smart failover Freemium