StepAudio 2.5 Realtime
Model overview
stepaudio-2.5-realtime
StepFun's bidirectional realtime audio model available through the China-region Step Plan.
speechaudiorealtimemultimodalrealtime voicevoice assistantenterprise access
Representative version
stepaudio-2.5-realtime
| Company | StepFun |
|---|---|
| Release | Not disclosed |
| Release type | Model release |
| Parameters | Not disclosed |
| Architecture | Not disclosed |
| Context | Not disclosed |
| Input modalities | audio / text |
| Output modalities | audio / text |
| Tool use / function calling | Tool use: Not disclosed; Function calling: Not disclosed |
| Structured output / reasoning | Structured output: Not disclosed; Reasoning: Not disclosed |
| Vision / audio / video | Confirmed: Audio |
| Open weights / License | No open weights currently / weight license not disclosed stepfun-stepaudio-2-5-realtime-current · License not applicable |
| Vendor API | Available StepFun China audio APIstepfun-stepaudio-2-5-realtime-current · 2026-07-13 |
| OpenRouter | Not separately listed on OpenRouter |
| Pricing | No reliable public source |
| Benchmark | No reliable public source |
| Public signals | No reliable public source |
| Use cases | Realtime voice agents / Spoken dialogue / Interactive audio / realtime voice |
| Claim evidence | Release event / Model specificationsStepFun China audio APIstepaudio-2.5-realtime · StepAudio 2.5 Realtime · stepaudio-2.5-realtime |
OpenRouter
Pricing / context / availability
| OpenRouter | Not separately listed on OpenRouter |
|---|---|
| OpenRouter listing | Not separately listed in the current OpenRouter public list |
| Mapped version | stepaudio-2.5-realtime stepfun-stepaudio-2-5-realtime-current |
| Pricing | No reliable public source |
| Context | Not disclosed |
| Speed/Latency | No reliable public source |
| Snapshot time | 2026-08-11T06:28:09.895Z |
| Source | View source |
Verified limitations
Usage boundaries
- Regional availability is limited to the China Step Plan; standalone pricing is not disclosed.
Missing public information
Public information not yet available
Parameter scale not disclosedRelease date not disclosedNot listed on OpenRouterNo reliable benchmark sourceNo public model-card activity countersNo linkable model-specific reviewSpeed/latency not disclosed