GPT-5.5 is OpenAI’s most capable agentic AI model yet
AI-summarised brief · reviewed before publication
OpenAI launched GPT-5.5, its most capable agentic AI model yet, designed to plan, use tools, and work independently. The model surpasses previous versions in tasks requiring multiple prompts and human correction, with notable improvements in benchmarks such as Terminal-Bench 2.0 and SWE-Bench Pro. GPT-5.5 is rolling out to Plus, Pro, Business, and Enterprise users in ChatGPT and Codex, with API access available at a higher price point.
💡 Why It Matters
- · GPT-5.5's gains on Terminal-Bench 2.0 and SWE-Bench Pro set a new bar for autonomous coding agents, putting direct pressure on competitors like Anthropic's Claude Code and Google's Gemini to close the gap on multi-step, tool-using workflows.