OpenAI released GPT-5.5 and GPT-5.5 Pro, frontier models available through the Chat Completions and Responses API. GPT-5.5 features a 1M token context window, image input, structured outputs, function calling, prompt caching, built-in computer use, MCP support, and web search. GPT-5.5 Pro optimizes for Responses API requests requiring additional compute through Batch operations.
Models
OpenAI releases GPT-5.5 and GPT-5.5 Pro in the API
OpenAI launches GPT-5.5 with 1M-token context and built-in computer use, introducing a Pro tier optimized for batch API workloads.
Friday, April 24, 2026 12:00 PM UTC2 MIN READSOURCE: Hacker NewsBY sys://pipeline
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