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AI Daily Brief — 2 October 2025

Thursday compressed three structural shifts. OpenAI completed its $6.6B secondary share sale at a $500B valuation — the world’s most valuable private company, surpassing SpaceX’s ~$400B. Investors included Thrive, SoftBank, Dragoneer, MGX and T. Rowe Price; only two-thirds of the authorized $10.3B was sold. Anthropic’s Claude Sonnet 4.5 landed in Visual Studio, JetBrains, Xcode and Eclipse via GitHub Copilot public preview — broadening reach to all major IDEs three days after Sep 29 launch. Sora 2’s deepfake debate intensified: the Sora app reached #1 on the US App Store, Sam Altman deepfakes (“Sam stealing GPUs at Target”) went viral, and estates of deceased celebrities (Robin Williams, Kobe Bryant, Paul Walker, George Carlin) plus SAG-AFTRA began coordinating with OpenAI on guardrails.

Top stories

  • OpenAI closes $6.6B at $500B valuation. Secondary tender lets employees cash out at world-record private valuation, leapfrogging SpaceX (~$400B). Investors: Thrive, SoftBank, Dragoneer, MGX, T. Rowe Price. Only ~$6.6B of authorized $10.3B sold. via Bloomberg
  • OpenAI $500B confirmed by CNBC. Same-day report confirms the $6.6B sale and names the same investor syndicate, cementing OpenAI’s position as the most valuable private startup on Earth. via CNBC
  • Claude Sonnet 4.5 in all major IDEs via GitHub Copilot. Public preview in Visual Studio, JetBrains, Xcode and Eclipse for Pro, Pro+, Business and Enterprise plans — three days after Sep 29 launch. via GitHub
  • Sora app #1 + Altman deepfakes go viral. Two days after Sora 2 launch, the invite-only app hit #1 free on the US App Store and was flooded with Sam Altman deepfakes — “Sam stealing GPUs at Target” became the meme of the week. Coverage on Oct 1-2 highlighted viral adoption and early copyright/deepfake fallout. via TechCrunch
  • Tinker API launch coverage peaks. Mira Murati’s Thinking Machines Tinker (Python API, LoRA-based fine-tuning, managed distributed GPU backend) drew sustained Oct 2 coverage. Karpathy endorsed it as keeping “90% of algorithmic creative control” while removing infra pain. via WinBuzzer
  • SAG-AFTRA + celebrity estates mobilize. Day two of Sora 2’s life saw the first wave of formal complaints — Robin Williams, Kobe Bryant, Paul Walker, George Carlin estates plus SAG-AFTRA began coordinating with OpenAI on guardrails. Multi-week escalation began. via NBC News
  • Crunchbase: OpenAI’s $6.6B secondary alone bigger than most Series Es. Crunchbase framed the Oct 2 close as a watershed — $500B private beats SpaceX’s $400B; the secondary tender alone exceeds most full Series E rounds. via Crunchbase

Who shipped

OpenAI shipped a $500B private valuation (and signalled the Sora 2 opt-in pivot for copyrighted characters). Anthropic via GitHub Copilot shipped Sonnet 4.5 into every major IDE. Thinking Machines kept Tinker rolling. Google, Meta, xAI, DeepSeek, Alibaba all quiet on launches.

Open-source pulse

No major Chinese open-source release on Oct 2. The Sep 30 wave (Z.ai GLM-4.6 + Ant Ring-1T-preview) continued to drive evaluation. Reflection AI’s NVIDIA-led $2B round positioning itself as “America’s open frontier lab to challenge DeepSeek” was being staged for the following week (Oct 9 announcement).

Money, infra & hardware

OpenAI’s $500B private valuation reframes AI capital markets. Stargate memory LOIs with Samsung Electronics and SK Hynix for ~900,000 DRAM wafers per month surfaced in early-October coverage — the largest memory commitment ever attached to a single AI project, layered on top of NVIDIA’s $100B Sep 22 deal and the AMD GPU deal queued for Oct 6.

Quiet corners

Anthropic’s Agent Skills beta version identifier was stamped 2025-10-02 — capability being staged on the platform two weeks before the Oct 16 public announcement. No standout arXiv breakouts. EU AI Act quiet.

By the numbers

  • $500B — OpenAI’s new private valuation (beats SpaceX’s $400B)
  • $6.6B / $10.3B — secondary tender size / authorized ceiling
  • 4 — major IDEs gaining Sonnet 4.5 via Copilot (VS, JetBrains, Xcode, Eclipse)
  • #1 — Sora app’s US App Store rank
  • ~900K/month — Stargate DRAM wafer LOI
  • Most-mentioned company: OpenAI
  • Quietest segment: open-source releases

Compiled by AI Feed’s editor from verified web sources for 2 October 2025.