{"data":{"id":"openai/gpt-5.3-codex","canonical_slug":"openai/gpt-5.3-codex-20260224","hugging_face_id":"","name":"OpenAI: GPT-5.3-Codex","created":1771959164,"description":"GPT-5.3-Codex is OpenAI’s most advanced agentic coding model, combining the frontier software engineering performance of GPT-5.2-Codex with the broader reasoning and professional knowledge capabilities of GPT-5.2. It achieves state-of-the-art results...","context_length":400000,"architecture":{"modality":"text+image+file->text","input_modalities":["text","image","file"],"output_modalities":["text"],"tokenizer":"GPT","instruct_type":null},"pricing":{"prompt":"0.00000175","completion":"0.000014","web_search":"0.01","input_cache_read":"0.000000175"},"top_provider":{"context_length":400000,"max_completion_tokens":128000,"is_moderated":true},"per_request_limits":null,"supported_parameters":["include_reasoning","max_completion_tokens","max_tokens","reasoning","reasoning_effort","response_format","seed","structured_outputs","tool_choice","tools"],"default_parameters":{"temperature":null,"top_p":null,"top_k":null,"frequency_penalty":null,"presence_penalty":null,"repetition_penalty":null},"supported_voices":null,"knowledge_cutoff":null,"expiration_date":null,"links":{"details":"/api/v1/models/openai/gpt-5.3-codex-20260224/endpoints"},"benchmarks":{"design_arena":[{"arena":"agents","category":"androidnative","elo":1084,"win_rate":35.2,"rank":32},{"arena":"agents","category":"fullstack","elo":1006,"win_rate":36.5,"rank":40},{"arena":"agents","category":"godotgamedev","elo":1124,"win_rate":45.1,"rank":24},{"arena":"agents","category":"mobileapps","elo":1094,"win_rate":41.4,"rank":39},{"arena":"agents","category":"webapps","elo":1064,"win_rate":36.9,"rank":35},{"arena":"models","category":"3d","elo":1052,"win_rate":35.3,"rank":94},{"arena":"models","category":"asciiart","elo":1178,"win_rate":51.2,"rank":31},{"arena":"models","category":"codecategories","elo":1169,"win_rate":47.2,"rank":68},{"arena":"models","category":"dataviz","elo":1185,"win_rate":50.6,"rank":59},{"arena":"models","category":"gamedev","elo":1198,"win_rate":51.3,"rank":52},{"arena":"models","category":"svg","elo":1169,"win_rate":54,"rank":44},{"arena":"models","category":"uicomponent","elo":1164,"win_rate":47.3,"rank":67},{"arena":"models","category":"website","elo":1182,"win_rate":48.6,"rank":66}]},"reasoning":{"mandatory":false,"supported_efforts":["xhigh","high","medium","low","none"],"default_effort":"medium"}}}