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Source: OpenAI is preparing to launch GPT-5.4, with an "extreme" reasoning mode and a 1M-token context window, matching past models but up from GPT-5.2's 400K
OpenAI's next GPT model is coming—and soon, according to a person with knowledge of it.
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Source: OpenAI is preparing to launch GPT-5.4, which will feature an "extreme" reasoning mode and a context window of 1M tokens, up from 400K in GPT-5.2