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  1. One Useful Thing78

    Ethan Mollick practically tests Claude Fable 5.2: Close but not complete AGI

    Ethan Mollick, after trying out Claude Fable 5.2 before its public release, believes that according to the definition of 'achieving the level of most human experts on most available computer-completed intellectual tasks,' it is close to AGI but still has a gap.

    Why it matters: The author uses six cross-domain practical cases to illustrate that the model's ability has approached general intelligence, but lacks the ability to judge whether works are good or bad.

  1. The Decoder71

    Anthropic claims that a single agent is superior to a multi-sub-agent architecture in terms of quality, cost, and latency.

    Anthropic indicates that a single context-loaded agent is often superior to a multi-sub-agent architecture in terms of quality, cost, and latency, and releases a migration toolkit to help teams evaluate whether to merge sub-agents. Anthropic claims that new models starting from Opus 4.5 can directly manage complex plans in a single loop, with a single-agent architecture running about twice as fast as a multi-agent solution in a single comparison.

    Why it matters: Anthropic based on enterprise deployment experience gives a judgment that a single agent is better than multiple sub-agents, and lists the applicable boundaries and migration paths.

  1. Anthropic Research78

    Anthropic researcher reflects on using Claude and BootLoops for interdisciplinary research.

    Anthropic researcher Matt reflected on the experience of using Claude with the open-source harness BootLoops for research, advancing 36 papers in 18 fields with 19 collaborators in three months, selecting from about 400 candidate problems.

    Why it matters: The author reflects on first-hand interdisciplinary practice, exploring the real boundaries of using agents for research, and providing reusable open-source harnesses and collaboration methods.

  1. Anthropic Research78

    Vibe physics: Harvard professor uses Claude Opus 4.5 to complete a high-energy physics thesis in two weeks

    Harvard physics professor Matthew Schwartz guides Claude Opus 4.5 to perform NLL re-sum calculation of Sudakov shoulder in C-parameter, producing a high-energy theoretical physics thesis containing a new factorization theorem within two weeks, while similar work usually takes a year.

    Why it matters: Harvard physics professor uses two weeks, 110 drafts, and 36M tokens to let Claude complete a high-energy physics thesis, listing point by point what the model can and cannot do.

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