'We don’t believe this kind of government access process should become the long-term default': OpenAI unveils big GPT-5.6 upgrades for ChatGPT, but you can't use them yet

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  • OpenAI announces three new AI models in the GPT-5.6 series
  • The flagship Sol model is accompanied by Terra and Luna
  • Access is currently restricted, as per requests by the US government

OpenAI has announced new GPT-5.6 model upgrades for ChatGPT, though for now they're only available to a select group of "trusted partnerships and organizations" — a restriction requested by the US government, which OpenAI doesn't seem best pleased about.

"We don’t believe this kind of government access process should become the long-term default," explains OpenAI's announcement. "It keeps the best tools from users, developers, enterprises, cyber defenders, and global partners who need them."

There are three models in the series: Sol (the flagship), Terra (for "everyday work"), and Luna (the smallest, fastest, and cheapest of the three). OpenAI says model performance is "competitive" with GPT-5.5, with improvements in affordability, safety, agentic capabilities, coding, biology, and cybersecurity.

Sol is...

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