Great letter from Mark articulating the principles guiding MSL: individual empowerment, invention over automation, and balance of power through broad access rather than concentrated control.
BIG TECH
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Reported US Framework Would Evaluate Frontier Models Before Release
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The unholy alliance I didn’t see coming: OpenAI and Anthropic are working together against Meta and SpaceX The Trump administration must define "frontier models" by August 1. Models covered by the framework would be submitted for evaluation at least 30 days before release. They
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Open Secure AI Alliance Expands to Safeguard Software and Agents
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The Open Secure AI Alliance is growing, with more organizations contributing expertise to help safeguard software and agents. http://
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Zuckerberg Describes Running Meta’s Superintelligence Lab as a Small Team
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Mark Zuckerberg is running Meta's superintelligence lab like a startup.
— Rowan Cheung (@rowancheung) 28 juillet 2026
When I interviewed him, he told me the principles on how he built the team:
"You don't need many hundreds of people. You need 50 to 100 people. It's a group science project who can keep the whole thing in… pic.twitter.com/QBtnqKlTNJMark Zuckerberg is running Meta's superintelligence lab like a startup. When I interviewed him, he told me the principles on how he built the team: "You don't need many hundreds of people. You need 50 to 100 people. It's a group science project who can keep the whole thing in
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AI21 Joins Open Weights Letter and Advocates Model Competition
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AI21 joined @nvidia
, @Microsoft , @a16z
, and dozens of others in signing the Open Weights and American AI Leadership letter. We build agentic systems and agent optimization products on top of models, open and closed alike. The competition between them is what keeps the field -
Anthropic Says It Has Never Advocated Banning Open-Weight Models
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BREAKING: Dario Amodei published Anthropic's official position on open-weights models. He wrote that the company "has never advocated for a ban" and that one "would protect US AI companies from competition, but that has never been my goal." Anthropic has been criticized for
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Sam Altman Reportedly Plans Washington Meetings to Preview New Model
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Sam Altman is heading to Washington to preview OpenAI’s newest model Wednesday and Thursday He is expected to meet Treasury Secretary Scott Bessent, Commerce Secretary Howard Lutnick, Senator Mark Warner and other officials to talk about (assumingly) GPT-6 Altman will likely
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Mistral Joins Open-Weight Alliance to Support Digital Safety
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We've joined the alliance. Open-weight models will ensure that we live in a safer digital world, and that America does not get left behind
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Anthropic Shares Internal Principles for AI Research Product Teams
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Internal team principles from Anthropic's AI research product team https://t.co/FFnNAneqp0 pic.twitter.com/Xzo5VFpB44
— Lenny Rachitsky (@lennysan) 27 juillet 2026Internal team principles from Anthropic's AI research product team
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Dianne Penn Explains Why Frontier Models Need Products Like Claude Code
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My biggest takeaways from @AnthropicAI's Head of Product for AI research and Labs, Dianne Penn:
— Lenny Rachitsky (@lennysan) 27 juillet 2026
1. You need frontier products to feel frontier models. Opus 4.5 wouldn’t have had its breakout moment without a vehicle like Claude Code—and Claude Code wouldn’t have seen that… https://t.co/FFnNAneqp0My biggest takeaways from @AnthropicAI
's Head of Product for AI research and Labs, Dianne Penn: 1. You need frontier products to feel frontier models. Opus 4.5 wouldn’t have had its breakout moment without a vehicle like Claude Code—and Claude Code wouldn’t have seen that