AI showed real teeth today: OpenAI reports a general‑purpose model cracked a long‑standing Erdős problem, while Cohere open‑sourced its new Command A+ and Perplexity shipped production query‑aware context compression. SpaceX’s S‑1 hints at AI compute-as-a-service with Anthropic, and developer rails expanded with Vercel’s Chat SDK updates, a WordPress AI Gateway plugin, and Tailscale’s Aperture CLI.