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The S&P 500 fell 4.36%, its worst day since April 2025, and the Nasdaq closed in correction as AI and chip stocks were sold.
METR estimated that Anthropic is improving its models about twice as fast as it did between March 2024 and October 2025, mostly because of its own use of AI.
The Bank of England raised Bank Rate to 4% on an 8–1 vote and expects inflation of around 5% by the middle of next year.
An outside assessment with access to internal data puts the acceleration at about 2x on well-specified tasks. Anthropic redacted most of the evidence METR found most informative.
Full storySource: Yahoo Finance. Latest data: 5 November 2026.
The index closed at 9,011.14 on 5 November, down from 10,268.65 on 4 November. It stands about 38% below its closing high of 14,634.72 on 22 June.
OpenAI says the model found at least 81 new Firefox vulnerabilities and went out of bounds in under 1% of a test designed around the Hugging Face incident. The figures are the company’s own.
· CyberScoop · The VergeTwo days after voters backed limits on data centres, OpenAI said it would cover electricity and grid costs at future campuses it owns and stop requiring public officials to sign non-disclosure agreements.
· The Neuron · MLQ.aiThe model has 594bn parameters, 17bn of them active, and scores 31 on the Artificial Analysis index. Weights are due under an Apache 2.0 licence after external safety testing.
· Thinking Machines Lab · Business InsiderA stochastic decoder steers generation with step-level and outcome signals while keeping several trajectories for a final vote, and can be read as approximate sampling from a verifier-tilted distribution.
The value of one more attempt peaks at intermediate difficulty, so the best static allocation is an inverted U. Thompson Sampling with a verifier and a good prior lifts the solved share from 14% to 27%.
A Cramér-type moderate deviation theorem for a self-normalised radius statistic in \(\mathbb{R}^d\) holds for every \(a_n = o(n^{1/6})\) under only a finite third moment.
An open-source loop lets a language model propose trading hypotheses while fixed code decides. One survivor with Sharpe ratios near 3 in validation fell to 0.26 on its single holdout use.
The company says the roughly 7,500-page reference on algebraic geometry is now a single machine-checked library of about 16 million lines. The claim has not been independently reviewed.
· AxiomThe Nasdaq composite fell 5.52% to 24,315.00 on Thursday, 11.9% below its record, and the chip index lost 12.25%. South Korea’s Kospi triggered a circuit breaker on Friday.
Reuters reported, citing four people, that a roadshow planned for the week of 9 November is in doubt and that some investors see a $1.5tn valuation as the high end.
· Reuters, via The Globe and Mail · Investing.com, via Yahoo FinanceBrent settled $3.67 higher at $98.29 on Thursday. Eurasia Group cut the odds of a US deal with Iran to 10% from 20%.
The first rise since 2023 came with a forecast that inflation will reach around 5% by the middle of next year. Catherine Mann voted for 4.25%.
· Bank of England · MoneyWeek