Span-01 — Free AI Chat on Rewind.ai

Chat with Span-01 for free — no signup, no credit card. Respan's Span-01 runs in your browser on Rewind.ai, with pay-as-you-go tokens and full API access.

What is Span-01?

Span-01 is a behavior scoring model from Respan. It reads a conversation span and returns, for each plain-language behavior you define, the probability that the behavior is present. It is.

How does Span-01 work?

Type your message in the box above and Span-01 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 Span-01 and other models at any time from the picker at the top.

Is Span-01 free?

Span-01 is pay-as-you-go at $0.02/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.