AI Agents
GPT-5.5: The Agentic Work Model OpenAI Shipped to Challenge Claude Mythos
GPT-5.5 arrived April 24, 2026, marketed as an "agentic work model" — not a smarter chatbot. OpenAI positioned it explicitly against Claude Mythos. Here's what changed, what the benchmarks show, and why the rivalry goes deeper than model scores.
5 months ago