Grok STT（语音转文字）
xAI 的语音识别模型，经 Cloudflare 平台直接计费、免额外 Key，落在每日免费额度内即可免费转写。模型 id：xai/grok-stt。
Free Grok STT API
Updated 6/5/2026
xAI speech-to-text (ASR) on Cloudflare — accurate transcription within the daily free allowance, no extra key.
About the Model
How to call Grok STT
curl
curl https://api.cloudflare.com/client/v4/accounts/$CF_ACCOUNT_ID/ai/run/xai/grok-stt \
-H "Authorization: Bearer $CF_API_TOKEN" \
-H "Content-Type: application/octet-stream" \
--data-binary @audio.mp3javascript
const audio = await (await fetch('https://example.com/audio.mp3')).arrayBuffer();
const res = await env.AI.run('xai/grok-stt', { audio: [...new Uint8Array(audio)] });Provider Details
The following platforms provide free access to Grok STT through free tiers, trial credits, or daily quotas.
| Provider | Context Window | Free Quota | Requires CC | Trust / Verified | Action |
|---|---|---|---|---|---|
| Cloudflare Workers AI | N/A | 100 requests per day | No | Trust 99 | Details |
Frequently Asked Questions
Is Grok STT free to use?
Yes. Grok STT is available for free through 1 provider(s) listed below, with no purchase required.
What are the rate limits and quotas?
Free access varies by provider — Cloudflare Workers AI: Rate Limit.
How do I get a free Grok STT API key?
Sign up with Cloudflare Workers AI, then create an API key from your dashboard. See the provider details above for the exact steps.
Which providers offer Grok STT for free?
Grok STT is currently available for free via: Cloudflare Workers AI.
Know another free provider for Grok STT?
Help the community by sharing other ways to access this model for free.