Speech-to-text model with word-level timestamps, speaker diarization, multichannel audio, and streaming
Model catalog
Models
Every model in the catalog with source-linked pricing, context limits, provider availability, and published benchmark results.
Grok Voice STT 1.0 is xAI's speech-to-text model. It supports transcription with word-level timestamps, optional speaker diarization, and multichannel audio.
1 provider
Convert text into spoken audio with a single API call. The API supports a rich set of expressive voices, inline speech tags for fine-grained delivery control, and output formats from high-fidelity MP3 to telephony-optimized μ-law.
1 provider
Video model for text-to-video, image-to-video, and reference-to-video generation with optional voice references
2 providers
Convert text into spoken audio with a single API call. The API supports a rich set of expressive voices, inline speech tags for fine-grained delivery control, and output formats from high-fidelity MP3 to telephony-optimized μ-law.
1 provider
Fast Grok model for responsive chat, reasoning, and tool-assisted work
2 providers
Fast Grok model for responsive chat, reasoning, and tool-assisted work
3 providers
| Model | Creator | Inputs | Context | Input | Output | Released | Compare |
|---|---|---|---|---|---|---|---|
| Grok Voice Transcribe 2.0xai/grok-voice-transcribe-2.0 | xAI |
Not documented | — | — | 2026-09-17 | ||
| Grok Voice STT 1.0xai/grok-voice-stt-1.0 | xAI |
15K | — | — | 2026-08-04 | ||
| Grok Voice TTS 1.0xai/grok-voice-tts-1.0 | xAI |
15K | — | — | 2026-07-31 | ||
| Grok Imagine Video 1.5xai/grok-imagine-video-1.5 | xAI |
1.024K | — | — | 2026-05-30 | ||
| Grok TTSxai/grok-tts | xAI |
15K | — | — | 2026-03-16 | ||
| X-Ai/Grok-4-Fast-Reasoningxai/grok-4-fast-reasoning | xAI |
2M | $0.2 | $0.5 | 2025-12-18 | ||
| X-Ai/Grok-4-Fast-Non-Reasoningxai/grok-4-fast-non-reasoning | xAI |
2M | $0.2 | $0.5 | 2025-12-18 |