{"id":"openai/gpt-5.5","aliases":["openai/gpt-5.5-20260423","openrouter:openai/gpt-5.5"],"displayName":"OpenAI: GPT-5.5","author":"openai","createdAt":"2026-04-24T17:31:33.000Z","updatedAt":"2026-09-08T15:44:27.512Z","popularityRank":145,"metadata":{"modalities":["file","image","text"],"inputModalities":["file","image","text"],"outputModalities":["text"],"contextLength":1050000,"maxOutputTokens":128000,"family":"gpt","modelsDev":{"provider":"openrouter","sourceUrl":"https://models.dev/api.json","description":"Default frontier GPT for coding, computer use, research, and knowledge work","lastUpdated":"2026-04-23","releaseDate":"2026-04-23","capabilities":{"reasoning":true,"tool_call":true,"attachment":true,"temperature":false,"open_weights":false,"structured_output":true},"maxInputTokens":922000,"knowledgeCutoff":"2025-12-01"},"tokenizer":"GPT","licenseStatus":"unknown","weightsAvailable":false,"hostedInferenceAllowed":false,"gated":false,"supportedParameters":["include_reasoning","max_completion_tokens","max_tokens","reasoning","reasoning_effort","response_format","seed","structured_outputs","tool_choice","tools"],"providerNames":[],"designArenaCategories":["agenticgamedev","agentichtmlslides","agenticslides","agenticslides(html)","agenticslides(python-pptx)","androidnative","fullstack","godotgamedev","htmlslides","mobileapps","pptxslides","python-pptxslides","webapps","3d","asciiart","codecategories","dataviz","gamedev","svg","uicomponent","website"],"isModerated":true},"availability":"unknown","externalBest":null,"multivibeNetwork":null,"description":"GPT-5.5 is OpenAI’s frontier model designed for complex professional workloads, building on GPT-5.4 with stronger reasoning, higher reliability, and improved token efficiency on hard tasks. It features a 1M+ token...","runtimes":[],"protocols":[],"harnesses":[]}