StepFun model product
StepAudio 2.5 TTS (Aug 2026)
5 TTS (Aug 2026) is a text-to-speech model from StepFun.
Updated Sep 8, 2026. Default version: StepAudio 2.5 TTS (Aug 2026)
LLMBoard Text-to-Speech Score63.5StepAudio 2.5 TTS (Aug 2026)
Coverage35%1 benchmark families
Context windowN/ATokens
Native catalog priceN/APrice unavailable
StepAudio 2.5 TTS (Aug 2026) Capability Profile
This profile uses the model's current scored version. Arena ratings and prices are shown separately.
StepAudio 2.5 TTS (Aug 2026) Benchmark Results
Benchmark scores for StepAudio 2.5 TTS (Aug 2026).
Sort by
Benchmark | Score | Rank | Participants | Percentile | Evidence | Evaluated |
|---|
| BenchmarkArtificial Analysis Text To Speech | Score1,205.00 elo | Rank10 | Participants96 | Percentile90.53% | EvidenceB | EvaluatedN/A |
StepAudio 2.5 TTS (Aug 2026) Arena Results
Preference and agent-evaluation results for the default version.
No Arena results
The default version does not have a matching Arena result yet.
StepAudio 2.5 TTS (Aug 2026) Pricing
Prices are shown in the model's native media unit and resolution tier.
- Native price
- N/A
- Price unit
- N/A
- Tier
- Standard
- Tracked offerings
- 0
No price available
This model does not have a current media price.
Media catalog prices are not converted into token input or output prices.
StepAudio 2.5 TTS (Aug 2026) Runtime Performance
Provider-specific output speed and catalog latency for StepAudio 2.5 TTS (Aug 2026). Runtime does not affect the capability score.
No runtime data
No provider-specific speed or latency record is linked to the default version yet.
Output Speed is generated output tokens received per second. Catalog latency is reported separately from observed provider TTFT.
StepAudio 2.5 TTS (Aug 2026) Specifications
Technical details for the model's default version.
- Version
- StepAudio 2.5 TTS (Aug 2026)
- Released
- Unknown
- Knowledge cutoff
- Unknown
- Parameters
- N/A
- Context window
- N/A
- Max output
- N/A
- Inputs
- text
- Outputs
- audio
- Open weights
- No
- License
- Unspecified
StepAudio 2.5 TTS (Aug 2026) Versions
Available versions of this model. The score column identifies the version used in the overall ranking.
Sort by
Version | Released | LLMBoard | Parameters | Context | Max output | Open weights | License |
|---|
| VersionStepAudio 2.5 TTS (Aug 2026) | ReleasedN/A | LLMBoard63.48 | ParametersN/A | ContextN/A | Max outputN/A | Open weightsNo | LicenseUnspecified |
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What is StepAudio 2.5 TTS (Aug 2026)?
Key information about StepAudio 2.5 TTS (Aug 2026) and its available data.
5 TTS (Aug 2026) is a text-to-speech model from StepFun. It is ranked by Artificial Analysis.
Data as of 2026-09-08.
FAQ
Common questions about StepAudio 2.5 TTS (Aug 2026).
When was StepAudio 2.5 TTS (Aug 2026) released?
A release date is not available for the default version.
How much does StepAudio 2.5 TTS (Aug 2026) cost?
No native catalog price is currently available for StepAudio 2.5 TTS (Aug 2026).
Who created StepAudio 2.5 TTS (Aug 2026)?
StepAudio 2.5 TTS (Aug 2026) was created by StepFun.
What is the context window for StepAudio 2.5 TTS (Aug 2026)?
A context window is not available for the default version.
Is StepAudio 2.5 TTS (Aug 2026) open weight?
No. The default version is not marked as having publicly available weights.