Anthropic acquired Stainless 💸

Stainless is an SDK and MCP platform that turns an API spec into SDKs across TypeScript, Python, Go, Java, Kotlin, and more.

> “Anthropic created MCP to make agent connectivity possible. By bringing together the Stainless and Anthropic teams, the Claude Platform continues to push the frontier of developer experience and agent connectivity.”

‼️🚨 BREAKING: Cloudflare's CISO just published what Anthropic's unreleased Mythos did against more than 50 of their own production repos. According to him, Mythos is too powerful and must "include additional safeguards" before releasing to the public.

Turns out the model can chain multiple low-severity bugs into a single severe exploit with a working PoC, where previous frontier models would stop at "interesting bug, unclear if exploitable."

At triage time, that means fewer hedged findings and less time spent asking "is this even real?" A finding that arrives with a PoC is a finding you can act on.

Cloudflare is also explicit about the safety side. The Mythos Preview build provided for Project Glasswing did not include the safeguards present in generally available models like Opus 4.7 or GPT-5.5. The model's organic refusals are real, but Cloudflare states they are not consistent enough to serve as a complete safety boundary on their own, and that any cyber frontier model made generally available in the future must ship with additional safeguards on top of that baseline.

Interesting detail: Cloudflare was not on the original Project Glasswing launch partner list with Apple, AWS, Google, Microsoft, CrowdStrike, and others. Instead they got invited later on.

https://blog.cloudflare.com/cyber-frontier-models/

Andrej Karpathy has joined Anthropic and getting back to the R&D!

> I think the next few years at the frontier of LLMs will be especially formative.

GOOGLE I/O 🔥: GEMINI 3.5 FLASH HAS STARTED ROLLED OUT ON GEMINI AND APIs!

Testing time soon 👀

New Gemini android app UI UX