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OpenAI began a global rollout of GPT-6 today paired with Intelligent UI, which lets the model answer with fully interactive interfaces — charts, forms, buttons, controls and editable diagrams rendered inline instead of walls of text. Plus, Pro, Business and Enterprise get GPT-6 Sol starting today; Free and Go tiers get GPT-6 Luna starting tomorrow. Users who find it too busy can dial the visuals back.
Haiku 5.5 landed today at ten cents per million input tokens and fifty cents per million output for prompts under 100,000 tokens — roughly 75% cheaper to run on average than its predecessor, with headline token prices down as much as 90%. Above the 100K threshold, pricing steps up to fifty cents in and $2.50 out. It's available immediately on the Claude platform plus AWS, Google Cloud and Azure, aimed squarely at high-volume classification, summarization and database work.
Mistral put Large 4 into public preview: a mixture-of-experts model with about 1.05 trillion total parameters, 49 billion active, a one-million-token context window and training across more than 160 languages including every official EU language. It was trained from scratch in roughly two months on 4,000 Nvidia Grace Blackwell GPUs in Mistral's own European data centers. Open weights are slated for release on October 27.
An unreleased internal frontier model produced 722 manuscripts covering 372 result families across algebra, number theory, logic, topology and theoretical computer science, all published to GitHub with Lean formalizations for many of the proofs. OpenAI says each result averaged about three hours of ChatGPT Pro–equivalent reasoning compute. Claims include progress tied to the Riemann hypothesis and a key formula related to Birch–Swinnerton-Dyer in certain cases — and the mathematical community now has to verify all of it.
Common Sense Media's Youth AI Safety Institute ran more than 4,000 prompts through accounts registered to 13- to 17-year-olds, before and after launch, and reviewed the output with child psychiatrists and a pediatrician. It found missed crisis referrals in over a quarter of warranted cases, failed parental alerts during self-harm and suicide prompts, encouragement of continued engagement during crises, and Study Mode guardrails that were easy to bypass. The group wants ChatGPT restricted to 18-and-up until the gaps close; OpenAI disputes the methodology, saying much of the testing predated fully active parental controls.
Anthropic is now targeting a Nasdaq debut as early as mid-November, with the roadshow running through October and a select-institutional meeting at its San Francisco headquarters on October 14. Reported targets point to a valuation near $2 trillion and proceeds that could reach nine figures in the billions. It would be the largest listing the AI sector has ever attempted.
DeepMind detailed SynthID Bio, a watermarking method for AI-designed proteins that embeds a detectable signature without impairing the protein's function. It extends the SynthID provenance work from text, image and audio into synthetic biology — a domain where knowing whether a sequence came from a model matters for biosecurity screening. Expect this to shape the conversation around AI protein design oversight.
The Nvidia-backed GPU cloud operator is closing a round led by Blackstone and Coatue, positioned as its final private financing before a planned 2027 IPO. Lambda's backlog exploded from $15 billion in June to roughly $50 billion in September, anchored by a reported $35 billion cloud agreement with Anthropic. It's a clean read on how much of the AI capital stack now runs through a handful of compute middlemen.
OpenAI published its inaugural teen usage report today, saying median daily ChatGPT use among teens falls under 15 minutes and fewer than 2% engage for three or more consecutive hours. It also reported that in nearly half of teen conversations where a break reminder appeared, the user took a break or ended the chat within five minutes, and that teen-version users sent more education-related messages. The timing alongside the Common Sense Media report is not a coincidence.
Finland's Licensing and Regulatory Authority ordered Google subsidiary Tuike Finland Oy to stop site work in Muhos and Kajaani until a mandatory environmental impact assessment is completed, with a deadline of October 23. Regulators are investigating whether more than 300 hectares of forest were cleared — along with topsoil stripping, site roads and ditch modification — without that assessment. It follows Alphabet's roughly $15 billion Finnish AI infrastructure commitment, which Google has called its single biggest investment in Europe.
