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How did Anthropic get Opus 5 so wrong from great predecessors like 4.8? Serious question here

Reddit · py-net · August 25, 2026
Was Opus 5 a new pre-trained weight set different from predecessors? Is it the same pre-training weights but post training went wrong? Is it in the specific harness of Opus 5? The verbosity and unreliability of Opus 5 has been long and intensely criticized at

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