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Solar Pro 4 — Free AI Chat on Rewind.ai
Chat with Solar Pro 4 for free — no signup, no credit card. Upstage's Solar Pro 4 runs in your browser on Rewind.ai, with pay-as-you-go tokens and full API access.
What is Solar Pro 4?
Solar Pro 4 is Upstage's cost-efficient large language model, featuring a 524K context window. It is built for long-horizon tasks and agentic workflows, with strong capabilities in office productivity, document-intensive.
How does Solar Pro 4 work?
Type your message in the box above and Solar Pro 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 Solar Pro 4 and other models at any time from the picker at the top.
Is Solar Pro 4 free?
Solar Pro 4 is pay-as-you-go at $0.03/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.