Anthropic cut off access to its Mythos 5 and Fable 5 AI models to comply with new US export controls. Elon Musk became the world’s first trillionaire after SpaceX shares surged in its IPO. The update also covers a CRISPR method that targets “undruggable” cancers and the first working nuclear clocks from Chinese and European teams.

• Anthropic fully cut off its Mythos 5 and Fable 5 models to comply with new US export controls barring their use outside the US.
• Elon Musk became the first trillionaire after SpaceX's IPO share price hit $135, pushing his net worth past $1 trillion—over 3% of US GDP.
• A new CRISPR method targets and destroys cells with a tumor-suppressor mutation found in up to half of all cancers (70-90% of hard-to-treat cases), offering a faster path to treatment than small-molecule drugs.
• Chinese and European teams each independently built working nuclear clocks using thorium-229, solving the laser wavelength problem with different approaches (higher power vs. denser crystal matrix).

This issue highlights five shifts in AI-driven software engineering from Cursor’s Developer Habits Report, along with SpaceX’s record $75 billion IPO and Jeff Bezos’s new startup Prometheus aiming to build an “artificial general engineer.” It also covers advances in vertical AI agents, NASA’s improved Deep Space Network for Artemis II, cute home robots by Familiar Machines, Homebrew 6.0.0 updates, and perspectives on AI’s limits in replacing developers.

• SpaceX's IPO raised $75 billion with demand 4x the shares offered, potentially pushing Musk past trillionaire status
• Bezos's new startup Prometheus aims to build an "artificial general engineer" for designing chips, cars, and rockets, feeding into Amazon and Blue Origin
• Cursor's report on millions of coding sessions finds AI is speeding up individual developers but widening a power-user gap, while reliable vertical agents require structured memory hierarchies instead of dumping data into prompts
• AI still can't replace engineers because writing code was never the bottleneck—defining requirements, verifying results, and owning outcomes remain human tasks

Today’s TLDR rundown covers SpaceX’s IPO oversubscribed by more than four times, OpenAI prepping steep token-price cuts ahead of an AI price war with Anthropic, and Stack Overflow’s new API-first knowledge platform for AI agents. Plus quick briefs on gene-therapy vision reversal and China’s first commercial brain implant.

• SpaceX's IPO was oversubscribed more than 4x, selling 555.6M shares at $135 each—set to be the biggest IPO in U.S. history if it holds
• OpenAI is preparing to cut token prices to match Anthropic, risking thinner margins for both as they burn cash on GPU costs
• Stack Overflow launched an API-first "Stack Overflow for Agents" platform using multi-agent loops and trust scores to keep docs accurate for AI agents
• China approved NeuraMatrix's NEO brain-computer interface for commercial use, putting it ahead of Neuralink's N1, which remains stuck in U.S. research trials

SpaceX is gearing up for a public offering after private rounds valued it at about $137 billion. The IPO would open ownership to public investors and mark a major shift from its long-held private status.

• 137 Ventures has lined up ~$100M to buy SpaceX employee shares at $100-110/share, valuing the company at $130-140B—nearly double its $74B valuation from two years ago.
• Starlink drove $3.2B of SpaceX's projected $11.5B revenue this year, and Musk says it could be cash-flow positive by late 2026, a milestone investors see as key to an IPO.
• Musk has told advisers he wants to go public before 2028, but Starship production issues and European regulatory slowdowns are making some potential buyers cautious.
• NASA's $4.1B lunar lander commitment and the Space Force's $2.8B rocket deal give SpaceX financial cushion to delay an IPO until market conditions improve.

Banks and firms involved in SpaceX's IPO must buy subscriptions to Elon Musk’s Grok AI service. Some banks are reportedly spending tens of millions to integrate Grok into their systems. SpaceX recently filed its IPO paperwork amid ongoing legal issues related to Grok's AI technology.

• Musk is requiring banks and firms working on SpaceX's IPO to buy Grok subscriptions
• Some banks are spending tens of millions of dollars to integrate Grok into their IT systems
• This is happening while Grok faces investigations over generating CSAM and nude images
• Musk also pushed banks to advertise on X, though less forcefully than the Grok requirement