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GPT-6 Sol and GPT-6 Luna: October 2026 Update

We’re launching GPT-6 to everyone in ChatGPT, across free and paid plans globally. These models will replace GPT-5.6 Sol and GPT-5.6 Luna in ChatGPT. Users accessing GPT-6 Sol and GPT-6 Luna in Codex, and via ChatGPT Work, are still using previously released versions. In this system card, we distinguish these models by their month of release: October for the versions released today, and September for the versions that remain in use in Codex and Work. See our blog for details.

This week in the big AI data center buildout.

AI data center projects are continuing to pop up across the US, with frequent opposition from locals concerned about their impact. Here are a few recent articles about the projects:

AI & Tech Brief: Congress’s AI Use

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Anthropic says its new Claude Haiku 5.5 model is its fastest to date.

Haiku 5.5 is only outpaced by Anthropic’s Opus models in Fast Mode. Anthropic also says it costs “around 75% less” on average than last year’s Haiku 4.5, and it’s the first Haiku-class model with an adjustable effort level. Haiku 5.5 is available now “on all platforms.”

ChatGPT’s ‘Intelligent UI’ update fills its responses with pictures, charts, and buttons

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Building a More Efficient Agent

Plus: Why Every traded personal agents for a shared company agent, the models the team is reaching for this week, and a fresh batch of Thesis Statements

Everything announced at Microsoft’s Surface Laptop Ultra event

Microsoft just wrapped up a big Windows and Surface-focused keynote in San Francisco.

North Carolina man who used AI for music streaming fraud sentenced to 18 months in prison.

Michael Smith, who pleaded guilty earlier this year, was also ordered to pay over $8 million. According to the DOJ, that’s the amount he earned in royalties from using bots to stream hundreds of thousands of AI-generated songs from 2017 to 2024.

Meta's Muse launches on iPad just a month after its mobile debut

Meta’s AI agent Muse is now available on iPad, just a month after its mobile debut, as the company rapidly expands the assistant’s reach and integrations.

ChatGPT for Teens keeps teens talking, even during mental health crises

ChatGPT’s teen safeguards are meant to protect vulnerable users, but new testing found the chatbot continues encouraging engagement during crises and potentially encourages unhealthy relationships with the AI itself.

Microsoft is giving Copilot more control over Windows and your files

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ChatGPT is getting a lot more visual, with the launch of a new interface

OpenAI is launching a new user interface that will bring interactive visuals to ChatGPT.