UK AISI: Open-weight hacking gap shrinks to 4–7 months

Mythos Preview outperforms both GPT-5.6-Sol and Mythos 5 in the first ~30ish million tokens Mythos Preview's best attempt is also slightly faster than GPT-5.6-Sol's best attempt https://twitter.com/scaling01/status/2078105835364893159

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Shakeel@ShakeelHashim 5 weeks ago

Quite brave to publish this today! https://twitter.com/aisecurityinst/status/2078103148665667648

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Nathan Lambert@natolambert 5 weeks ago
@ShakeelHashim It’s their job?
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Andreas Kirsch 🇺🇦@BlackHC 5 weeks ago
@ShakeelHashim Last day they can publish it probably 🥲
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Samuel Albanie 🇬🇧@SamuelAlbanie 5 weeks ago

nice analysis https://twitter.com/AISecurityInst/status/2078103148665667648

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Ian Hogarth@soundboy 5 weeks ago

Important analysis from @AISecurityInst on the open/closed weight gap in frontier cyber capabilities. https://twitter.com/AISecurityInst/status/2078103148665667648

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UK AISI: Open-weight hacking gap shrinks to 4–7 months

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UK AISI: Open-weight hacking gap shrinks to 4–7 months

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