Anthropic Ships Sonnet 5.5: Real-World Test on Website Build and Multi-Currency Sheet
Rasmic · x · 2026-09-30
Anthropic shipped Sonnet 5.5 today, and the author tested it on real work rather than benchmark charts:
- It built a first-pass website for a limo fleet.
- It analyzed a messy multi-currency financial sheet.
- It missed a currency conversion until the author caught it.
The post also breaks down what shipped and how Sonnet 5.5 compares with Opus 5.5 and GPT-6 Sol. Takeaway: if your last AI-for-work attempt was six months ago, it's worth trying again.
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