StepAudio 2.5 Realtime
StepAudio 2.5 Realtime is worth evaluating for vision when its provider route and context window match the workload.
Use it for
- Teams evaluating vision
- Buyers comparing 1 tracked provider route
Do not use it for
- Strict JSON or tool-calling flows
- Family
- StepAudio 2.5
- Released
- 2026-05-24
- Specialization
- voice
- Openness
- Proprietary
- License
- ProprietaryCommercial use: conditional
- Weights
- Not released
- Code
- Unknown
Cheapest of 1 route · StepFun
About
StepAudio 2.5 Realtime is StepFun's end-to-end real-time conversational voice model. It handles speech input and produces speech output through a single unified architecture with no intermediate ASR/TTS pipeline steps. Key capabilities include persona-consistent roleplay via dedicated RLHF training on million-scale persona data, paralinguistic comprehension (detecting and responding to tone, emotion, and speaking rate), and low-latency dialogue. Supports Chinese and English. Available via WebSocket API (step-2.5-realtime). Analogous in function to OpenAI's GPT Realtime models.
StepAudio 2.5 Realtime is a proprietary model in the StepAudio 2.5 family. The structured metadata tracks multimodal input and audio. This page tracks provider routes through StepFun. Headline tracked benchmarks include Big Bench Audio 97.6.
Top use-case fit
Vision
Included by capability and metadata signals in the decision map.
Provider price ladder
Compare API pricing across 1 providers for input and output tokens, batch, and cached reads when available.
| Provider | Input / 1M | Output / 1M | Route |
|---|---|---|---|
| StepFun | - | - | ServerlessPartial |
Capabilities
Benchmark peer barsfor Vision
No task-mapped benchmark peers are available for this model yet.
Benchmark scores(1)
| Benchmark | Score | Version | Source |
|---|---|---|---|
| Big Bench Audio | 97.6 | pct | https://artificialanalysis.ai/speech-to-speech |
Migration checks
No linked migration route is available for this model yet.
Frequently asked questions
When was StepAudio 2.5 Realtime released?
StepAudio 2.5 Realtime was released on 2026-05-24.
Which providers offer StepAudio 2.5 Realtime?
StepAudio 2.5 Realtime is available from 1 provider: StepFun.
What benchmarks has StepAudio 2.5 Realtime been tested on?
StepAudio 2.5 Realtime has been evaluated on 1 benchmark, including Big Bench Audio.
Cheapest of 1 route · StepFun