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GPT-5.4 — Free AI Chat on Rewind.ai
Chat with GPT-5.4 for free — no signup, no credit card. OpenAI's GPT-5.4 runs in your browser on Rewind.ai, with pay-as-you-go tokens and full API access.
What is GPT-5.4?
GPT-5.4 is OpenAI’s latest frontier model, unifying the Codex and GPT lines into a single system. It features a 1M+ token context window (922K input, 128K output) with support for.
How does GPT-5.4 work?
Type your message in the box above and GPT-5.4 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 GPT-5.4 and other models at any time from the picker at the top.
Is GPT-5.4 free?
GPT-5.4 is pay-as-you-go at $2.50/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.