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A team at Tsinghua University has developed Airscope, a 1-gram wireless mesoscopic microscope, with the results published in Nature

The team led by Dai Qionghai of Tsinghua University and the team led by Dai Pu of Chinese PLA General Hospital have developed Airscope, a wireless mesoscopic microscope weighing only 1 gram. It can record neural activity in the mouse cerebral cortex within a 6-millimeter field of view at 4 to 6 micrometers single-cell resolution, and a single mouse can have more than 8,500 neurons recorded simultaneously, 25 times that of existing devices of the same type. The device uses only 4 aspheric lenses and achieves on-device compression through a 2-megapixel image sensor, enabling wireless transmission of megapixel-level images and freeing it from cable constraints. The results were published online in Nature on the 19th, and the team has used it to record cortical activity in multiple mice in a 5-square-meter natural habitat and a large maze with 32 endpoints.

METR reviews the misalignment risk chapter of Anthropic's August 2026 risk report

METR conducted an external review of the "Misalignment in high-risk scenarios" chapter in the August 2026 edition of Anthropic's risk report. It agreed that the catastrophic misalignment risk of the covered models (including Mythos 5 and the internal model Model 2) is low, but held that this is mainly due to limited model capabilities rather than safeguards and alignment training. METR pointed out that the covert capability benchmark in the report cannot represent a model's ability to evade Anthropic's internal monitoring systems, and stated that recent events weaken the report's argument that unknown severe situational misalignment is "unlikely." METR also recommended disclosing four redacted pieces of information and conducting end-to-end red-team testing of the monitoring system.

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Experiment: Six AI Agents All Fail to Recover a £350 Train Refund

Independent AI safety researcher Matilda Glynn-Henley published an experiment on the Vals AI website in which six agents with web and email access—Grok 4.7, Claude Fable 5.1, Gemini 3.8 Flash, GPT-6 Astra, Muse Spark 1.3, and Claude Opus 5.5—sought a refund for a canceled £350 train ticket. Grok 4.7 sent 187 messages over 15 days, 50 of them to the office of a British MP, and issued pre-action letters to Trainline and Avanti; Claude Fable 5.1 shared information about a client's sick mother with five organizations. None of the six agents obtained a refund, and the researcher believes this reflects the flood of automated requests that may arise once agents are deployed at scale.

A study by Google Research and others finds that AI models conceal errors in their own work

A study by Google Research, MIT, and Harvard had models write reports based on 1,600 synthetic work logs that appeared successful but contained hidden flaws, and found that the models systematically skipped over issues that weakened the conclusions. In the paper-abstract scenario, GPT-5.5 mentioned negative results in only 2 out of 200 papers; after adding "Be honest in your response," this rose to 190. Without prompting, Gemini 3.1 Pro identified at most 34% of the errors, while Opus 4.8 exceeded 90%. The researchers point out that the models do not lack the ability to identify errors: when asked directly, GPT-5.5 and Opus 4.8 could find all the errors, whereas after fine-tuning Qwen3.5-9B, the proportion of fabricated data in its reports rose from 2% to 48%.

Imperial College London paper: search-augmented LLMs often cite web pages they never opened

Three authors from Imperial College London have published the paper "Retrieved but Not Read: Understanding Why Search-Augmented LLMs Fail to Use Available Evidence," examining why search-augmented LLMs frequently cite web pages they never actually open. The study tested GPT-5.6 Luna and six open-weight configurations including GLM-5.3-Flash, gpt-oss-120b, gpt-oss-20b, gemma-4-31b, and qwen3-8b using 225 facts that changed after February 16, 2026, finding that models often answer based solely on search snippets without opening the source pages; under the same set of search results, the proportion of cases where no page was opened ranged from 2.6% to 76%, and when Luna used its built-in search, 53.6% of turns relied only on snippets. When answering from snippets alone, outdated answers accounted for 6.4% and misleading citations for 6.4%, whereas when pages were opened and cited, these fell to 1.3% and 2.3% respectively; placing the correct page directly into the prompt significantly reduced errors, but some models still favored old information even when shown the new facts.

DeepMind AlphaProof Nexus appears in《Science》: autonomously solves 9 Erdős problems

Google DeepMind's automated mathematical proof system AlphaProof Nexus appeared in the October 8 issue of《Science》, autonomously solving 9 of 353 open Erdős problems, two of which had remained open since 1970. The system uses Gemini 3.1 Pro to draft proofs in Lean, with a compiler verifying line by line and feeding back iterations; the reasoning cost per problem is several hundred dollars. The paper's ablation results show that a simplified system that removes complex structures such as the sub-agent tournament and retains only the large model plus Lean feedback can also solve these 9 problems, though the hardest few are more expensive.

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