Opus 4.5
5 mentions across all digests
Opus 4.5 is an Anthropic language model released in November 2025, widely used for long agentic coding sessions with Claude Code and noted for strong loop-following reliability, though showing unexpected performance regression compared to Opus 4.6 on some tasks.
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Claude Code Hits Different
Evolutionary Search for Automated Design of Uncertainty Quantification Methods
Evolutionary search using LLMs designs uncertainty quantification methods 6.7% better than hand-crafted baselines, but reveals divergent model strategies—Claude evolves complex estimators while GPT prefers simpler schemes, with Opus 4.6 unexpectedly regressing.
Import AI 442: Winners and losers in the AI economy; math proof automation; and industrialization of cyber espionage
Import AI 438: Silent sirens, flashing for us all