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GPT-5.1: A smarter, more conversational ChatGPT

OpenAI Blog 12 November 2025, 00:00 ● Covered by 3 sources

OpenAI is releasing GPT-5.1, an updated version of its GPT-5 model designed to be more conversational and capable. The upgrade begins rolling out today to paid ChatGPT users. Users can now customize the tone and style of ChatGPT's responses to better match their preferences.

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We’re upgrading the GPT-5 series with warmer, more capable models and new ways to customize ChatGPT’s tone and style. GPT-5.1 starts rolling out today to paid users.

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TLDRocket 21 July 2026

The open-weight AI model market hit an inflection point today as Alibaba and Kimi released trillion-parameter competitors that challenge the closed-model orthodoxy—just as Washington moved to restrict them. Alibaba's Qwen 3.8 Max (2.4 trillion parameters) and Kimi K3 (2.8T) are going open-weight, with K3 ranking first on Frontend Web App Arena and fourth on agentic benchmarks, signaling that scale and transparency can coexist. The timing matters: while U.S. policymakers weigh layered restrictions on Chinese open models, technical experts are pushing back hard, arguing that closed gardens actually hurt security and competition more than they help. The real fragmentation risk isn't technical—it's regulatory.

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GPT-5.1: A smarter, more conversational ChatGPT

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