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Claude Opus 4.5 announced: prepare upgrade tests
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First seen: 2025-12-26
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Last updated: 2025-12-26
Overview
Anthropic announced Claude Opus 4.5, described as its most capable Claude model to date. Details are still emerging, but expect a new model identifier and behavior changes that warrant a quick A/B evaluation before switching defaults.
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Claude Opus 4.5 announced: prepare upgrade tests
Anthropic announced Claude Opus 4.5, described as its most capable Claude model to date. Details are still emerging, but expect a new model identifier and behavior changes that warrant a quick A/B evaluation before switching defaults.
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2025-12-26
2025-12-26 22:14