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Claude Opus 5.5 system card: Anthropic's internal measures show no sustained AI-attributable twofold acceleration of development, and the model is well below the level needed to substitute for the company's researchers; the preliminary estimate in the card is an acceleration of about 1.5 times, with a roughly 30% chance of a twofold one

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Recursive self-improvement of AI
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www-cdn.anthropic.com ↗

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