GPT-5.5
OpenAILanguage modeling/generationQuestion answering
GPT-5.5 is language modeling/generation model published by OpenAI in 2026.
About GPT-5.5
OpenAI · Multimodal,Language,Vision · Language modeling/generation,Question answering
LLM pricing & performance
Full LLM page →GPT-5.5 is available via API — live cost, context, and benchmark data:
Input / 1M
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Output / 1M
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Context
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Tokens/sec
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LiveBench: 81.3LMArena (Chatbot Arena) Elo: 1468.3
Details
- Provider
- OpenAI
- Task
- Language modeling/generation,Question answering
- Released
- 2026-04-23
- Open weights
- No