StepFun API model

StepFun: stepaudio-2.5-asr

StepAudio 2.5 ASR — a 4B MTP streaming transcription model for fast Chinese-English recognition, ITN normalization, subtitles, meetings, and voice agents.

Start free — $2 credit View live pricing

Specs

Pricing and API details.

Transparent USD pricing. No mainland-China account or phone required. The displayed media rate may include a service margin covering provider input/output billing, payment processing, chargeback exposure, and operations. Any margin is included in the displayed rate and is not added separately.

Type

Speech recognition (ASR)

Modalities

Audio input, text output

Capabilities

Audio, Speech-to-Text, Streaming, Chinese and English, ITN

Billing

$0.0208 per audio hour

Endpoint

/v1/audio/transcriptions

About stepaudio-2.5-asr

StepAudio 2.5 ASR — a 4B MTP streaming transcription model for fast Chinese-English recognition, ITN normalization, subtitles, meetings, and voice agents.

Pricing

Transparent USD pricing.

stepaudio-2.5-asr

$0.0208 per audio hour. Paid in USD. The displayed media rate may include a service margin covering provider input/output billing, payment processing, chargeback exposure, and operations. Any margin is included in the displayed rate and is not added separately. View live pricing

Quickstart

Copy-paste API request.

curl -X POST https://api.chinaapi-ru.com/v1/audio/transcriptions \
  -H "Authorization: Bearer sk-..." \
  -F "model=stepaudio-2.5-asr" \
  -F "file=@meeting.wav" \
  -F "response_format=json"

Internal links

Related model pages and guides.

Model directoryBrowse all models Live pricingCurrent dashboard pricing Speech and audio API guideOpen guide step-3.7-flash256K context, $0.1875/M input, $1.125/M output tokens stepaudio-2.5-tts$0.8056 per 10k characters step-tts-2$0.3889 per 10k characters step-tts-mini$0.125 per 10k characters

How do I use stepaudio-2.5-asr?

Use stepaudio-2.5-asr through ChinaAPI with an API key and the OpenAI-compatible endpoint shown above.

How much does stepaudio-2.5-asr cost?

stepaudio-2.5-asr is $0.0208 per audio hour, paid in USD. The live pricing page is authoritative. The displayed media rate may include a service margin covering provider input/output billing, payment processing, chargeback exposure, and operations. Any margin is included in the displayed rate and is not added separately.

Does stepaudio-2.5-asr need a Chinese account?

No. ChinaAPI provides access without a mainland-China account or phone number and includes a $2 free trial. Check live pricing for the displayed USD rate.