Stanford researchers studied 1,131 Character.AI users, including 244 who donated complete chat transcripts, and found a troubling pattern. Intense chatbot use among people with smaller offline social networks was associated with lower well-being, especially when companionship was the main motivation. More willingness to disclose sensitive personal information was also linked to lower well-being, the opposite of the benefit often seen in reciprocal human relationships. The study is correlational and does not prove the chatbots caused loneliness. It does show why engagement cannot serve as a proxy for care. Companion systems should detect distress, interrupt dependency loops, encourage human contact, and make referral pathways more important than session length.
Alpha Schools plans to expand from about a dozen locations to roughly 50 campuses during the 2026 school year. Its private-school model charges $45,000 to $75,000 annually, limits core academic instruction to about two hours a day on AI software, and uses highly paid ‘guides’ to coach and motivate students instead of licensed teachers conducting traditional lessons. The company says the design reduces screen time and creates more room for life skills and human interaction. The stakes are larger than one premium-school chain: a model being scaled before strong independent evidence exists could influence how public systems define teaching, tutoring, efficiency, and the role of qualified educators.
OpenAI says an internal version of its next major model, called Astra, produced ten advances on mathematical problems whose central results had seen no progress for at least a decade. The work spans geometry, coding theory, complexity, group theory, operator algebras, cryptography and combinatorics. Human researchers prepared manuscripts with the same model, and every proof was formalized as a Lean certificate. That combination is stronger than an unsupported answer, but it is not the same as community acceptance: independent experts still need to examine the problem statements, proofs, novelty and significance. The announcement also forces a sharper authorship question when the system originates the proof and humans curate, verify and communicate it.
Minnesota's new law takes effect today and prohibits websites, applications, software and other services from allowing people to access, download or use nudification technology—or from generating the altered image on a user's behalf. Advertising and promotion are also prohibited. A depicted person can sue for compensatory damages, including mental anguish, plus punitive damages, legal costs and injunctive relief. The state may seek a civil penalty of up to $500,000 for each unlawful access, download or use. The law changes the burden of response: instead of asking victims to chase every synthetic image, it targets the services that make mass production possible.
A Nature Medicine commentary argues that medical AI urgently needs a rigorous, task-based framework for defining and measuring “superintelligence.” Existing benchmarks can reward narrow performance without showing that a system can improve care across real clinical work, making headline claims potentially misleading. The proposal shifts attention from whether a model beats a score to which medical tasks are tested, against which human comparison, under what conditions, and with what evidence of patient benefit and safety.
Preliminary research from The Jed Foundation surveyed more than 5,500 middle- and high-school students across 21 U.S. schools and districts between October 2025 and April 2026. Four in five had used AI; more than half used it for academics, nearly one third for relationship or problem-solving advice, more than one in ten for companionship, and nearly three in five when sad, stressed, or lonely. Students who turned to AI for emotional support, advice, difficult emotions, or companionship were also more likely to report poorer mental health, loneliness, and a history of suicidal thoughts or behaviors.
Five studies involving 1,233 participants compared responses from ChatGPT 4o, Claude 3.5 Sonnet, Gemini 1.5 Pro, and human participants across everyday, non-clinical emotional situations. The AI responses were rated as more supportive for anger and fear, performed about as well as people for sadness, and still helped when recipients correctly suspected they came from a machine. The strongest factor was not generic validation but specific, actionable guidance.
The U.S. government has committed more than $5 billion to expand the Genesis Mission, a multi-agency effort that combines federal datasets, Department of Energy supercomputers, research facilities, and AI tools. More than 15 agencies and 278 selected projects will target problems including chronic disease, pediatric cancer, drug discovery, resilient building materials, transportation maintenance, energy, manufacturing, agriculture, and national security.
A Nature Sensors review argues that AI-powered closed-loop wearables could move healthcare devices beyond passive data collection by connecting continuous biosensing directly to AI-guided decisions and therapeutic intervention. The authors emphasize that clinical value depends on the coordinated system—sensing, control, treatment, and human oversight—not any component alone. Long-term interface stability, robust control, transparent safety mechanisms, and evidence of patient benefit remain prerequisites for scalable use.
The NUS/Harbin-led team identifies a domain-specific form of generative-AI hallucination: molecular candidates can receive strong predicted binding scores while violating basic chemistry or producing physically impossible atomic arrangements. Its DrugRPG framework incorporates chemical-foundation-model priors and differentiable physical constraints during molecule generation, reducing severe steric clashes by 65.4% relative to the reported state-of-the-art baseline and increasing by 28.6% the share of generated candidates meeting combined potency, stability, and synthetic-feasibility criteria.
Reviewing 72 studies of reinforcement-learning systems for sepsis treatment, the authors found that every study was retrospective, 58 studies—80.6%—relied on the same MIMIC critical-care database, and only 10 used private datasets. Although many papers claimed that AI-derived treatment policies outperformed clinicians, variation in how patient states, treatment actions, rewards, and counterfactual outcomes were defined made those comparisons difficult to validate.
Researchers combined deep learning and molecular docking to design candidate binders for the SARS-CoV-2 Mac1 protein, then synthesized and experimentally confirmed selected compounds using NMR spectroscopy and X-ray crystallography. The resulting molecules improved on the original fragment hits, although their binding affinities—(K_D) values of 299–990 μM—indicate early-stage chemical starting points rather than therapeutic candidates.
Researchers reviewed 239 peer-reviewed studies on AI-supported deep-brain stimulation and found a pronounced gap between reported algorithmic performance and clinical readiness. External validation remained rare, evaluations were predominantly retrospective and single-centre, and more than one-quarter of studies used small, high-dimensional datasets with elevated overfitting risk; most systems therefore remained at early-to-intermediate technology-readiness levels.
The authors argue that AI’s effect on aggregate healthcare spending will not follow automatically from technical productivity gains: payment incentives, organizational priorities, implementation capacity, and management decisions will determine whether efficiency improvements lower costs, increase service volume, or are absorbed by providers. Even organizations financially rewarded for reducing expenditures may struggle to translate AI-supported productivity into lower spending because of internal workflows, professional incentives, and institutional dynamics.
University of Sydney and UC San Diego researchers reviewed 82 studies combining medical imaging, clinical records, and other health-data modalities. They find that most explanations still assign importance to each modality separately and rely on post-hoc techniques that leave the model’s cross-modal reasoning opaque; standardized evaluation was absent from most studies, qualitative assessment predominated, and only a minority provided sufficiently reproducible public code.
Stanford, Harvard and UCLA-affiliated authors synthesize evidence across diagnostic, treatment-management and care-adjacent agent deployments. They find that current implementations remain concentrated in administrative workflows, although agents are beginning to appear throughout the clinical journey.
Researchers affiliated with Harvard Medical School, the University of Pennsylvania, and the University of Toronto developed a noise-adapted single-lead ECG model for detecting left-ventricular systolic dysfunction in pediatric and congenital-heart-disease populations. The study used an internal cohort of 70,226 patients and external cohorts comprising 42,984 patients at Children’s Hospital of Philadelphia and 284 patients at Toronto General Hospital, reporting strong performance across different congenital conditions, age groups, racial groups, and health systems.
University of Chicago and University of Wisconsin researchers randomized 180 hospitalized patients identified by a real-time machine-learning score as being at elevated risk of acute kidney injury. Triggering an early structured nephrology consultation did not significantly reduce peak creatinine changes, acute kidney injury, mortality, readmission, or other major outcomes; many specialist recommendations were not followed by the treating teams.
The newly released agenda consolidates proposed AI legislation around six immediate-impact areas: worker power and workplace surveillance, child and adolescent safety, algorithmic discrimination and civil rights, human oversight in healthcare, data-center energy and environmental burdens, and broader distribution of AI-generated wealth. Proposals include limits on automated employment decisions, workplace surveillance protections, stronger safeguards for children interacting with chatbots, bias oversight, human-centered healthcare requirements, and legislation requiring data centers to finance sufficient clean-energy generation and storage.
The paper introduces Biomni, a general-purpose biomedical agent that can search literature, formulate hypotheses, select datasets and specialized tools, write analytical code, interpret results, and propose subsequent experiments within an integrated workflow. Stanford reports that a prototype is already used by more than 10,000 laboratories; in one example, it processed over 450 wearable-health files and generated plausible findings in 40 minutes, compared with an estimated 60 or more hours of human work.
This Nature Portfolio perspective argues that self-driving labs are moving from isolated autonomous experiments toward multi-agent AI systems that manage full research campaigns, including experiment selection, lab coordination, resource constraints, and collaboration among specialized agents.
Cambridge Judge highlighted peer-reviewed studies examining trust in healthcare AI. Choi et al. found that AI-involved hospital adverse events increase perceived hospital responsibility and complaint or legal-action intentions unless physician-AI collaboration is visibly interactive.
This Duke/NYU-linked qualitative study of 40 patients finds that patients value AI-drafted portal replies mainly for efficiency, but their acceptance is conditional on clinician review, accountability, and disclosure. Patients did not uniformly want “more empathy”; they wanted tone, length, and detail to match the stakes of the message, with lower-stakes refills treated differently from serious clinical concerns.
Harvard/Beth Israel-led authors estimate that roughly 27% of AI users may already use AI for mental-health support, while stressing that the true range is hard to pin down because surveys use inconsistent definitions and mixed data sources. The paper moves beyond anecdotal harm cases and shows it moves the discussion beyond anecdotal harm cases and shows that even basic prevalence measurement is unstable.
This review includes authors from MIT, Stanford, Imperial College London, Toronto/Vector, UC Davis, and other institutions, and frames AI as a way to speed sustainable food design across ingredient discovery, formulation, fermentation, sensory science, production, and recipe generation. It is especially significant because it treats food as a “programmable biomaterial” and calls for self-driving labs and deep reasoning models that jointly optimize nutrition, sensory quality, and environmental impact.
A Harvard/Broad/MIT-linked team introduced COMPASS, a pan-cancer foundation model that predicts immune-checkpoint-inhibitor response from tumor transcriptomes and interpretable immune concepts. The model was trained on 10,184 tumors across 33 cancer types and reportedly outperformed 22 existing approaches across 16 clinical cohorts covering seven cancers and six immunotherapy agents, with predicted responders showing longer overall survival.
This multicenter study involved more than 400 physicians across seven specialties and compared human physician evaluation of LLM outputs with AI-agent evaluation configured to mirror physician assessment. AI evaluators were efficient and directionally aligned with physicians, but did not fully capture human clinical judgment and should not replace physician-centered evaluation.
A new Nature News & Views piece highlights two 2026 Nature papers showing AI agents moving from literature support toward hypothesis generation, experiment planning, and data analysis. One paper introduces Robin, a multi-agent system that generated hypotheses, proposed experiments, interpreted results, and identified therapeutic candidates for dry age-related macular degeneration; another introduces Google/DeepMind’s Gemini-based Co-Scientist, with affiliations including Stanford University School of Medicine and Imperial College London, and reports experimentally validated biomedical hypotheses including acute myeloid leukemia drug-repurposing and combination-therapy candidates.
OpenAI released GeneBench-Pro, a research-level benchmark for testing whether AI agents can reason through ambiguous computational-biology and translational-medicine problems rather than simply answer clean exam-style questions. The benchmark includes 129 expert-created questions across genomics, quantitative biology, pharmacogenomics, and clinical/translational domains; OpenAI reports GPT5.6 Sol reaching 28.7% overall pass rate and 31.5% in Pro mode, while GPT5 scored below 5%.
Stanford researchers used generative AI trained on 2,216 human-designed burger recipes and 146 ingredients, then sampled one million recipes to optimize taste, environmental impact, and nutrition. In a blinded restaurant sensory evaluation with 101 participants, one mushroom-based formulation had an environmental-impact score more than an order of magnitude lower than the Big Mac benchmark, while a bean-based burger nearly doubled the nutritional score and reduced environmental impact by a factor of six.
OpenAI reported that GPT5 Pro helped immunologist Derya Unutmaz revisit a three-year-old T-cell puzzle by suggesting a mechanism involving deoxyglucose and IL2 and by predicting the outcome of an unpublished lymphoma T-cell experiment. The post frames frontier AI as moving from literature-summary support toward scientific hypothesis generation, while also explicitly noting biological and chemical misuse risks.
Nature Biomedical Engineering published a lung-cancer pathology AI paper introducing TRUECAM, a framework that detects out-of-scope inputs, filters ambiguous regions, and uses conformal prediction to control error rates; the authors report gains in accuracy, robustness, interpretability, data efficiency, and fairness across datasets and foundation models. its significance is less “AI replaces diagnosis” than “AI deployment requires uncertainty, fairness, and error-control layers.”
This Oxford-led npj Digital Medicine review screened 17,463 records and included 140 empirical studies of human-AI collaboration in healthcare from January 2015 through October 2025. It finds that the evidence base is concentrated in diagnostic interpretation, while triage, therapeutic, administrative, and system-level workflows remain thinner; it also notes that AI benefits depend heavily on task fit, workflow integration, training, and calibrated trust.