OpenAI disputes Navier Stokes claims, Mistral raises €3B - Daily AI Brief #535

Mistral raises €3 billion in a Series D round, valuing the French AI company at more than €21 billion after the investment. Samsung Electronics, the Scaleup Europe Fund and PSG Equity jointly led the funding, which Mistral will use for AI research, computing capacity, infrastructure and international expansion. Read more

NYU professor Tristan Buckmaster alleges that OpenAI used information from his work with Anthropic mathematician Levent Alpöge on the Navier Stokes problem and sought to remove Alpöge's credit. OpenAI mathematics head Sebastian Bubeck rejects the allegations, while the researchers report preliminary results developed with Codex and Claude. Read more

OpenAI demonstrated the Apartments.com ChatGPT app during a GPT-6 Astra apartment search demo. Apartments.com says referrals from ChatGPT have grown nearly 40% since the app launched in early August. Read more

OpenAI's GPT-6 Astra completed Valve's 3D puzzle game Portal without a walkthrough or scripted assistance. The run took about 24 hours, used roughly 3,300 tool calls and cost under $600 in API usage. Read more

ModelBest and the OpenBMB community release the open source MiniCPM5-2B language model for local use on devices including PCs, smartphones, robots and IoT hardware. The 2 billion parameter model supports tool calling, search, code generation and multi step reasoning, alongside datasets and training resources. Read more

ChainIT releases a white paper on its Compliance Protocol, which evaluates current evidence and policy rules to decide whether actions by AI agents, people or organizations can proceed. The protocol can approve, add controls to, review, hold or reject actions, while not replacing regulated compliance programs or authorizing payments. Read more

OpenAI introduces ChatGPT Images 2.5, with improved image detail, reference fidelity and multi turn editing, alongside generation speeds up to 50% faster than the prior model. New ChatGPT features include Sketch, templates, image comments and prompt sharing, while two related models are available through the API. Read more

Google DeepMind releases AlphaGenome Atlas, a searchable one petabyte dataset containing AI generated predictions for more than 9 billion possible single letter DNA changes. The resource, developed with several research institutions, is available for noncommercial research and is not approved for clinical use. Read more

Meta launches Muse, a personal AI agent for US users aged 18 and over, available through standalone apps, the web and WhatsApp. The service can send emails, book travel, complete forms and make purchases, with free and paid plans from $20 to $100 per month. Read more

Google will provide nearly 100,000 educators and more than 1.1 million students in Missouri with free access to Gemini for Education, Gemini Notebook, AI training and career certificates. Missouri residents can also access AI courses and Google Career Certificates through Missouri Job Centers, while participation remains voluntary. Read more

Wolters Kluwer Legal and Regulatory launches Libra Academy across Europe to train legal professionals to use its Libra AI workspace for research, drafting and review. The service includes self paced courses, webinars, local language use cases and a professional community with each Libra license. Read more

LumApps appoints Sébastien Cano as CEO effective December 1, 2026. Founder Sébastien Ricard will become Executive Chairman, focusing on long term strategy and governance, while Cano leads operations, the Workhub product and global customer growth. Read more

OpenAI says roughly 10,000 AI agents identified a finite time singularity in the three dimensional Navier Stokes equations after 88 hours. The company released a technical paper and Lean formalization, while independent mathematicians still need to verify the proof. Read more