name = "stepfun-ai/Step-3.5-Flash" description = "StepFun flash model for efficient multimodal reasoning, coding, and tool use" family = "step" release_date = "2026-02-11" last_updated = "2026-02-11" attachment = false reasoning = true reasoning_options = [] temperature = true tool_call = true structured_output = true open_weights = false [cost] input = 0.1 output = 0.3 [limit] context = 262_000 output = 262_000 [modalities] input = ["text"] output = ["text"]