Model ReleasesJun 28, 2026
OpenAI unveils GPT-5.6 in three sizes, but only trusted partners get it first
OpenAI announced its GPT-5.6 family — Sol, Terra, and Luna — on June 26, releasing it initially to a small group of vetted partners at the request of the US government, with a public launch expected within weeks.
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Model ReleasesJun 16, 2026
Anthropic's most powerful model yet launched, then went dark within days
Claude Fable 5 arrived on June 9 as the first model in Anthropic's new Mythos-class tier, but a US government export-control directive forced the company to pull access worldwide just three days later.
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