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Claude Opus 5 anti-verbosity policy
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Anthropic introduced an anti-verbosity policy for Claude Opus 5 that constrains response length and complexity. The model achieved 100% on the ARC-AGI-3 public benchmark when paired with Claude Code and an additional skill.
- Claude Opus 5 implements anti-verbosity constraints to reduce unnecessary response length
- Model reached 100% accuracy on ARC-AGI-3 public benchmark
- Achievement required Claude Code integration plus one additional skill
- Policy aims to improve response efficiency and directness
- Benchmark result represents full performance on public ARC-AGI-3 test set