Particle-1 — Free AI Chat on Rewind.ai

Chat with Particle-1 for free — no signup, no credit card. Particle AI's Particle-1 runs in your browser on Rewind.ai, with pay-as-you-go tokens and full API access.

What is Particle-1?

Particle-1 is a token-efficient agentic coding model from Particle AI, post-trained on DeepSeek V4.1 Flash. It is suited for software engineering work such as terminal workflows, codebase changes, and data.

How does Particle-1 work?

Type your message in the box above and Particle-1 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 Particle-1 and other models at any time from the picker at the top.

Is Particle-1 free?

The free daily tokens (2,500 a day, 5,000 with a free account) cover Rewind's free models; other models run on tokens from a token pack or paid plan (from $5).