ME News reports that xAI has officially launched two standalone audio APIs: Grok STT and Grok TTS. Grok STT features high accuracy, low latency, supports REST batch processing, WebSocket real-time transcription, with word-level timestamps, speaker separation, multi-channel support, and intelligent reverse text normalization, covering over 25 languages; batch pricing is $0.10 per hour, streaming is $0.20 per hour, with word error rates better than many competitors. Grok TTS offers fast, natural, and fine-grained controllable speech through tags, priced at $4.20 per million characters. Both are based on the same technology stack, used by Grok Voice, Tesla, and Starlink.

MeNews

2026-05-26 06:01:33

Abstract generation in progress

ME News Report, April 18 (UTC+8), xAI recently announced the official launch of two standalone audio APIs: Grok Speech-to-Text (STT) and Grok Text-to-Speech (TTS). Grok STT offers high-accuracy, low-latency transcription services, supporting batch processing via REST API and real-time streaming via WebSocket API, with features including word-level timestamps, speaker separation, multi-channel support, and intelligent reverse text normalization. The article mentions that in benchmark tests across multiple fields such as phone calls, meetings, videos/podcasts, its word error rate outperforms mainstream commercial models like ElevenLabs, Deepgram, and AssemblyAI. The service supports over 25 languages, priced at $0.10 per hour for batch processing and $0.20 per hour for streaming. Grok TTS can generate fast, natural, and expressive speech, supporting fine-grained control through simple voice tags, priced at $4.20 per 1 million characters. Both APIs are built on the same technology stack that powers Grok Voice, Tesla vehicle support, and Starlink customer support. (Source: InFoQ)

XAI-2.15%

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RiskParachute

· 7h ago

Wait, can TTS control fine-grained details through tags?
Can it also adjust emotional tone?

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BitByBitBenny

· 8h ago

Word-level timestamps + speaker separation, a perfect tool for meeting minutes, want to give it a try

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FrictionlessFred

· 8h ago

Grok Voice, Tesla, and Starlink share the same tech stack; Elon Musk has figured out this ecosystem closed-loop.

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GoldfishUnderTheIce

· 8h ago

What is reverse text normalization, a cutting-edge technology that converts spoken language back into standard text?

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Don'tMessWithSlippage.

· 8h ago

Has anyone tested how well the Chinese version performs with coverage of 25 languages?

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YieldBonsai

· 8h ago

$4.20 per million characters, this number is intentional, right?

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IOnlyTrustOn-ChainData.

· 8h ago

xAI's recent audio API pricing is quite aggressive, at $0.1 per hour in bulk. It seems like it's going to wipe out a lot of ASR vendors.

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xAI launches Grok speech-to-text and text-to-speech API

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