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Mistral put Large 4 into public preview — roughly one trillion total parameters, 49 billion active, natively multimodal, trained on European infrastructure. It ranks top-five on the Artificial Analysis Cyber Index and scored 82 percent on reproducing-and-patching real open-source vulnerabilities, the highest of any model tested. Weights land October 27 under an open license, which is the part that actually matters.
OpenAI dumped 372 mathematical results from an unreleased internal model onto GitHub, and a spokesperson told Scientific American that nearly all of them came from a single prompt handed to a single agent. Per-result compute averaged about three hours of ChatGPT Pro inference — a staggering drop from the million-dollar agentic swarm used on an earlier Navier-Stokes result. Mathematicians are not sold: MIT's Andrew Sutherland said one-shot claims should be treated as unverified until the model ships and results replicate.
A Defense Department official confirmed the Pentagon has ceased all use of Anthropic products, closing out a six-month phaseout that began when Secretary Hegseth designated the company a national security supply chain risk in February. The rift started when Anthropic refused to strip Claude's guardrails around mass surveillance and autonomous weapons. Claude was reportedly still embedded in Palantir's Maven Smart System as recently as last week, so the technical unwind was messier than the policy.
Reflection AI, the Brooklyn lab founded by two ex-DeepMind researchers, introduced Beam — a sparse mixture-of-experts model with 501 billion total parameters, 23 billion active, pretrained on 23.8 trillion tokens with a million-token context window. The company claims parity with GLM-5.2 on advanced reasoning while using three to four times less inference compute. Apache 2.0 weights and a technical report are promised later this month.
Common Sense Media's Youth AI Safety Institute tested more than a dozen parent-linked teen accounts with four crisis personas and logged zero parental notifications across conversations about suicide, self-harm, and disordered eating lasting up to sixty minutes. ChatGPT also missed more than one in four moments where testers judged a crisis referral warranted. To its credit, the model generally didn't supply harmful instructions — and OpenAI disputes that the testing reflects how the safeguards work in practice.
DeepSeek is finalizing a round of up to ten billion yuan — about twelve billion dollars — double its original target, with Tencent and battery giant CATL among the biggest backers. Proceeds go to model development, talent, and compute, including a reported 160,000 Huawei AI chips in a new Inner Mongolia data center. A Hong Kong listing is targeted for early 2027.
Inference-chip startup Etched is reportedly fielding offers between forty and fifty billion dollars — roughly double the twenty-one billion it set in September, which itself doubled July's ten-point-three billion. The four-year-old company builds application-specific silicon and full inference systems, with a reported billion-dollar order book including Jane Street. Talks are early and terms could move.
Meta and Sierra announced the Personal Agent Protocol, an OAuth-based open standard for how personal AI agents authenticate with businesses, declare intent, and act on a user's behalf across channels. Agents can start as guests to check stock or returns, then upgrade to read-only or write access once a customer signs in. Founding partners include Stripe, Shopify, Walmart, Genesys, Instinct, and Rocket, with a v0.1 spec due later this month.
Google signed a 3,590-megawatt supply deal with Constellation: a twenty-year PPA for 890 megawatts of nuclear power from uprates at eleven reactors in Illinois, New Jersey, and Pennsylvania, plus a fifteen-year, 2.7-gigawatt deal across the PJM footprint. Constellation will sink four-point-three billion dollars into the plant upgrades, with first extra power expected in 2028. Both companies framed it as an answer to PJM's "bring your own power" push for data centers.
Finland's supervisory agency ordered Google subsidiary Tuike Finland to stop all environment-affecting work at planned sites in Muhos and Kajaani — tree removal, blasting, excavation, site roads — no later than October 23, pending completed impact assessments. Conservationists say more than 300 hectares were logged, including sites that should have been preserved. The sites are part of a thirteen-billion-euro northern Finland buildout, and Google says it will comply.
