Founded in 2023 by Elon Musk, xAI builds frontier AI systems with the stated mission of understanding the true nature of the universe. It is best known for its Grok family of models, which it has extended from language into generative media. In February 2026, SpaceX acquired xAI, making it a wholly-owned subsidiary of SpaceX.
Based in Palo Alto, California, xAI pairs large-scale compute with a fast-moving research team to build multimodal models that turn text and images into video and audio.
Its Grok Imagine line brings audio-native generation to fal: images, image editing, and short videos with synchronized dialogue, sound effects, motion, and identity preservation. Higher-quality Pro tiers improve detail and prompt adherence, while xAI's text-to-speech offers expressive voices.
Model families available on fal:
- Grok Imagine Image: text-to-image and image editing, plus Pro quality tiers
- Grok Imagine Video: image-to-video and text-to-video with native audio
- xAI TTS: text-to-speech with expressive voices
