xAI was founded by Elon Musk in March 2023 and is known for the Grok family of chatbots and models. SpaceX acquired it in February 2026, and it has since been renamed SpaceXAI and then SpaceX Super Intelligence. It is based in Palo Alto, California.
- Founded
- 2023
- Type
- Corporate division
- Founders
- Elon Musk, Igor Babuschkin and Kyle Kosic
- AI lab
- Inference provider
- 38 hosted endpoints
Catalogue
All models by xAI
25 models · 1–25
| Select models to compare | Model | Released | Context | Input /M | Output /M | Parameters | Type | I/O | Openness |
|---|---|---|---|---|---|---|---|---|---|
 Grok STT 2.0xAI | November 10, 2026 | — | $27.7778 | $0.00 | — | Transcription | audio → transcription | Closed | |
| Grok Imagine Video 1.5 LitexAI | October 1, 2026 | 1K | $0.00 | $0.00 | — | Video | text, image → video | Closed | |
| Grok 4.7xAI | September 21, 2026 | 500K | $2.00 | $6.00 | — | Text | text, image, file → text | Closed | |
| Grok Voice Transcribe 2.0xAI | September 17, 2026 | — | — | — | — | Text | audio → text | Closed | |
| Grok 4.6xAI | August 12, 2026 | 500K | $2.00 | $6.00 | — | Text | text, image, file → text | Closed | |
| Grok Imagine Image 2.0xAI | August 7, 2026 | 66K | $0.00 | $0.00 | — | Image | text, image → image | Closed | |
| Grok Imagine Video 1.5xAI | July 20, 2026 | 1K | $0.00 | $0.00 | — | Video | text, image → video | Closed | |
| Grok 4.5xAI | July 8, 2026 | 500K | $2.00 | $6.00 | — | Text | text, image, file → text | Closed | |
| Grok Imagine VideoxAI | May 18, 2026 | — | $0.00 | $0.00 | — | Video | text, image → video | Closed | |
| Grok Voice TTS 1.0xAI | May 15, 2026 | 15K | $15.00 | $0.00 | — | Speech | text → speech | Closed | |
| Grok 4.3xAI | April 17, 2026 | 1M | $1.25 | $2.50 | — | Text | text, image, file → text | Closed | |
| Grok STT 1.0xAI | April 17, 2026 | — | $27.7778 | $0.00 | — | Transcription | audio → transcription | Closed | |
| Grok Build 0.1xAI | April 16, 2026 | 256K | $1.00 | $2.00 | — | Text | text, image, file → text | Closed | |
| Grok Imagine Image QualityxAI | April 3, 2026 | 16K | — | — | — | Image | text, image → image | Closed | |
| Grok TTSxAI | March 16, 2026 | 15K | — | — | — | Audio | text → audio | Closed | |
| Grok 4.20xAI | March 10, 2026 | 2M | $1.25 | $2.50 | — | Text | text, image, file → text | Closed | |
| Grok 4.20 Multi-AgentxAI | March 10, 2026 | 2M | $1.25 | $2.50 | — | Text | text, image, file → text | Closed | |
| Grok 4.20 (Non-Reasoning)xAI | March 9, 2026 | 1M | — | — | — | Text | text, image, file → text | Closed | |
| Grok 4.20 (Reasoning)xAI | March 9, 2026 | 1M | — | — | — | Text | text, image, file → text | Closed | |
| Grok Imagine ImagexAI | January 28, 2026 | 16K | — | — | — | Image | text, image → image | Closed | |
| X-Ai/Grok-4-Fast-Non-ReasoningxAI | December 18, 2025 | 2M | — | — | — | Text | text, image, audio, video → text | Closed | |
| X-Ai/Grok-4-Fast-ReasoningxAI | December 18, 2025 | 2M | — | — | — | Text | text, image, audio, video → text | Closed | |
| Grok 4.1 FastxAI | November 19, 2025 | 2M | — | — | — | Text | text, image → text | Closed | |
| Grok 4.1 Fast (Reasoning)xAI | November 19, 2025 | 2M | — | — | — | Text | text, image → text | Closed | |
| x-AI/Grok-Code-Fast 1xAI | September 2, 2025 | 256K | — | — | — | Text | text → text | Closed |