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Claude Opus 5
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Overview
Claude Opus 5 is now available and offers advanced capabilities at half the price of Claude Fable 5. It sets a new standard in coding and knowledge work evaluations while being the default model on Claude Max, although it lags behind Mythos 5 in cybersecurity tasks.
Summary from anthropic.com.
Reports
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anthropic.com
Claude Opus 5
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Community reactions
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Hacker News · anthropic.com
Hacker News discussion ↗
Historical count: 5 · 5 saved in sample · Historical sample
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Based on 5 sampled comments from this thread. Analyzed 2026-07-24.
- Praise: Very impressive headline benchmark numbers — there's a buzz about this model potentially stepping up the game in AI performance.
- Praise: The focus on cost for performance is refreshing; it suggests a shift towards more accessible AI solutions.
- Concern: The benchmark table feels manipulative, with suspiciously selective highlighting that raises eyebrows about the validity of the performance claims.
- Concern: There's concern that while the numbers look good, the classifiers might render the model unusable, putting a damper on the excitement.