Claude Sonnet 5.5
5 hours ago
- Claude Sonnet 5.5 is the second model in the Claude 5.5 family, offering a clear upgrade over Sonnet 5.
- It runs 30%+ faster and costs up to 30% less for most tasks.
- Performance gains are dramatic, especially in coding: Terminal-Bench 4.0 score jumps from 10.3% to 70.6%.
- It excels in knowledge work, image understanding, and long-horizon tasks, nearly matching Opus 5.5 on several benchmarks.
- Sonnet 5.5 writes more clearly and is a better collaborator, with a knack for design and polished outputs.
- Pricing is unchanged but it needs fewer tokens per task, reducing cost per task by up to 30%.
- Safety improvements include better alignment, new cyber safeguards, and distillation prevention; biology safeguards remain the same.
- Available on all major cloud platforms with zero data retention and adjustable effort levels to balance cost and quality.