Meta Goes Closed-Source + $1.75T SpaceX IPO | AI News in 5

$1.75 trillion SpaceX IPO, Meta's closed-source Muse Spark, Anthropic's restricted Claude Mythos, OpenAI's four-day work week proposal, and Google's open-source Gemma 4. This week, the biggest companies in AI are making very different bets on power, access, and what happens next.

AI News in 5 is your fast, no-fluff weekly AI news roundup for founders, operators, and executives who need to stay current. Every Tuesday, in 5 minutes.

Stories Covered This Week:

• Meta launches Muse Spark, its first closed-source AI model under Alexandr Wang's $14B deal
• Anthropic restricts Claude Mythos to 50 partners via Project Glasswing over cybersecurity concerns
• OpenAI publishes 13-page policy calling for 32-hour work weeks and a "robot tax"
• SpaceX files for $1.75T IPO after $1.25T merger with xAI to build orbital data centers
• Google releases Gemma 4, open-source models running on a single laptop

Timestamps:

00:00 Intro

00:25 Meta launches Muse Spark, goes closed-source

01:15 Anthropic holds back Claude Mythos over hacking risks

02:10 OpenAI proposes four-day work week and robot tax

03:05 SpaceX files for $1.75 trillion IPO

03:55 Google releases Gemma 4 open-source

04:45 Outro

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