{"data":{"id":"step-3-5-flash","name":"step-3-5-flash","display_name":"Step 3.5 Flash","description":"An open-source Mixture-of-Experts reasoning model from StepFun with 196B total parameters (11B active), featuring a 256K context window and tool-calling support.","creator":"step","family":"step3p5","tier":"flash","version":"3-5","type":"language","size_in_bn":199.384,"modalities":{"input":["image","text"],"output":["text"]},"context_window":262144,"max_output_tokens":65536,"tool_use_system_prompt_tokens":0,"output_vector_sizes":[],"knowledge_cutoff":null,"training_data_cutoff":null,"supported_reasoning_efforts":["default"],"tokenizer":"Other","capabilities":{"function_calling":true,"parallel_function_calling":false,"structured_outputs":true,"prompt_caching":true,"reasoning":true,"web_search":false,"computer_use":false,"code_execution":false,"file_search":false,"url_context":false,"assistant_prefill":false,"native_structured_output":false,"adaptive_reasoning":false},"release_date":"2026-01-29","earliest_deprecation_date":"2026-06-29","deprecated":true,"has_pricing":true,"provider_count":2,"ids":["step-3-5-flash","step-3-5-flash-0202","stepfun-ai/Step-3.5-Flash","stepfun/step-3.5-flash"],"hf_likes":783,"hf_downloads":147877,"hf_downloads_all_time":532020,"hf_trending_score":5,"updated_at":"2026-08-12 08:02:44"},"meta":{"updated_at":"2026-08-12","request_id":"7a20a637-58fa-41be-b988-0c137a4307b4","execution_ms":9}}