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Billing details
Description
StepFun StepAudio 3 Realtime (preview) — StepFun's full-duplex voice model over a WebSocket session at GET /v1/realtime: natural interruption and turn-taking, adaptive reasoning while speaking, and tool calls during the conversation. Free while StepFun's preview runs. StepFun retires the preview name when the free period ends and releases a paid version, so plan for this model ID to stop working.
API endpoints
GET /v1/realtime(realtime)