Model Details
About
Grok 4 is xAI's latest reasoning model with a 256k context window. It supports parallel tool calling, structured outputs, and both image and text inputs. Note that reasoning is not exposed, reasoning cannot be disabled, and the reasoning effort cannot be specified. Pricing increases once the total tokens in a given request is greater than 128k tokens. See more details …
Use via API
curl https://api.free.ai/v1/chat/ \
-H "Authorization: Bearer YOUR_KEY" \
-d '{"model":"x-ai/grok-4"}'
FAQ
xAI: Grok 4 on Free.ai is a powerful AI-powered tool that you can use completely free of charge. No sign up required to get started.
Yes! xAI: Grok 4 is completely free to use with generous daily limits. Sign up for a free account to get even more usage, or upgrade for unlimited access.
xAI: Grok 4 uses state-of-the-art open-source AI models to deliver high-quality results. Your request is processed on our GPU servers and the result is returned in seconds.
No! You can use xAI: Grok 4 immediately without signing up. Creating a free account gives you 3x more daily usage and saves your history.
Anonymous users get a generous daily allowance that resets every 24 hours. Signed-in users get 3x more. Paid plans offer unlimited usage.
Your data is processed securely on our servers and is not stored permanently unless you choose to save it. We do not sell or share your data.
Yes! Content generated by xAI: Grok 4 is yours to use for personal and commercial purposes. Our AI models are all commercially licensed.
xAI: Grok 4 on Free.ai delivers comparable quality to paid services using the latest open-source AI models. We believe powerful AI should be accessible to everyone.
xAI: Grok 4 uses best-in-class open-source AI models including Qwen 2.5, FLUX, Whisper, and more. We regularly update to the latest models.
Yes! xAI: Grok 4 works perfectly on mobile devices. Our responsive design adapts to any screen size.
Sign up for a free account to get 3x more daily usage. For unlimited access, check our affordable pricing plans starting at $5/month.
Yes! After generating content, you can download it, copy it, or share it via a unique link. Signed-in users can also view their generation history.