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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.

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