Anthropic launches Claude Sonnet 5.5: 30% faster, up to 30% cheaper, 70.6% on Terminal-Bench
addyosmani · x · 2026-09-29
Anthropic has launched Claude Sonnet 5.5, per employee Addy Osmani: 30% faster and up to 30% cheaper than Sonnet 5 for most workloads, targeting well-scoped everyday tasks like bug fixes, docs, and slides.
Benchmarks show clear gains in agentic coding and computer use:
- 70.6% on Terminal-Bench 4.0
- 80.1% on OSWorld 2.1
The team also showcased the generational jump by having models paint the same photo in code.
Related event: Anthropic Launches Claude Sonnet 5.5: Over 30% Faster, Up to 30% Cheaper(58 posts)→
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