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Phi 4 — Free AI Chat on Rewind.ai
Chat with Phi 4 for free — no signup, no credit card. Microsoft's Phi 4 runs in your browser on Rewind.ai, with pay-as-you-go tokens and full API access.
What is Phi 4?
[Microsoft Research](/microsoft) Phi-4 is designed to perform well in complex reasoning tasks and can operate efficiently in situations with limited memory or where quick responses are needed. At 14 billion.
How does Phi 4 work?
Type your message in the box above and Phi 4 replies instantly — no setup required. Your chat history is saved locally in your browser; sign up free to sync it across devices and get an extra 10,000 tokens. You can switch between Phi 4 and other models at any time from the picker at the top.
Is Phi 4 free?
Phi 4 is pay-as-you-go at $0.07/M input tokens, but you can use it without paying: every visitor gets 2,500 free tokens a day with no sign up, and a free account raises that to 5,000.