Anthropic and Harvard put a paper on arXiv on October 15 showing Claude Mythos 5, given plain-language specs and an automated checker, redesigned eight quantum circuits from scratch.
AspireAI community · anthropic.com
Anthropic and Harvard put a paper on arXiv on October 15 showing Claude Mythos 5, given plain-language specs and an automated checker, redesigned eight quantum circuits from scratch.
On seven of eight, the new designs use both fewer qubits and fewer gates than the best published work; gains on the paper's own combined score range from about 4x to 39x. The headline "17x fewer gates" comes from a single circuit for elliptic-curve point addition — 17x fewer gates but 12% more qubits than the most compact prior design.
Think of it like a chef trying new plating for the same dish: same ingredients, less work, more options.
All numbers are the authors' own and not yet reproduced by other groups.
Read the story and explore more from the AspireAI community.
Two critical PHP remote code execution flaws — one found by GPT-5.6 Sol — were patched on October 21, 2026, and OpenAI published a disclosure framework alongside the fix. Fixed versions: PHP 8.5.12, 8.4.27, 8.3.36 and 8.2.35. Both allow unauthenticated remote code execution, and PHP's advisory says risk is highest for mod_php, where a demonstrated exploit triggers before any application code runs. The CVEs are distinct failure modes. CVE-2026-109618 (OOM corruption): out-of-memory handling can interrupt PHP while internal request data is only partially initialized, and request cleanup may then treat the invalid data as valid. CVE-2026-109619 (stale global state): request-owned internal state can survive after its backing memory is freed, and a later request served by the same worker may use that stale state. OpenAI states GPT-5.6 Sol identified the first flaw through its Patch the Planet initiative, and that Wiz independently discovered and reported both vulnerabilities. PHP's maintainers led the fixes and release, with Wiz, Cloudflare and OpenAI contributing research and coordination. Wiz's write-up adds that it used GPT-5.6 Sol and Gemini 4 Argon throughout, with Gemini 4 Argon contributing to finding the vulnerability and validating the patch. OpenAI describes the gap between discovery and public exploitation as a "Defender's Window," proposes a five-stage response framework, and committed $1 billion in subsidised Daybreak model access for organizations with limited security resources. Honest caveats: these are OpenAI's and Wiz's own characterizations, and OpenAI also notes the same capabilities help attackers build offensive tooling faster. PHP 8.1 and older no longer receive updates from the PHP project.