{"id":"x-ai/grok-4.1-fast","object":"model","created":1763510400,"owned_by":"xai","canonical_slug":"grok-4-1-fast-non-reasoning","name":"xAI: Grok 4.1 Fast","description":"xAI Grok 4.1 Fast - latest version with improved tool calling and 2M context. Best agentic performance from xAI without explicit reasoning.","context_length":2000000,"architecture":{"modality":"text+image-\u003etext","input_modalities":["text","image"],"output_modalities":["text"],"tokenizer":"grok","instruct_type":null},"pricing":{"prompt":"0.0000002","completion":"0.0000005","input_cache_read":"0.00000005","web_search":"0.014"},"top_provider":{"context_length":2000000,"max_completion_tokens":30000,"is_moderated":false},"per_request_limits":null,"supported_parameters":["temperature","top_p","max_tokens","stop","tools","tool_choice","response_format"],"default_parameters":null,"expiration_date":null,"is_deprecated":false,"supported_endpoints":["/v1/chat/completions","/v1/responses"]}