signal量子位2026-09-23
Claude Opus 5.5 Surprise: Migrates 680k Lines of Code in a Day, API Price Cut by 20%
Claude Opus 5.5 tops multiple benchmarks in coding, knowledge work, and computer use, with output speed 30% faster than Opus 5. API prices drop 20% to $4 per million input tokens and $20 output, while cache read price falls 60% to $0.20. Early testers migrated 680k lines of code in under a day, and it introduces Fable 5.1-level safety guardrails.
- for who
- Developers and engineering teams running large codebase migrations, audits, and agent programming workflows on the Claude API
- why now
- Claude Opus 5.5发布，API降价20%，缓存价砍60%。
- what changes
- Multi-week migration projects and cache-heavy agent loops become same-day tasks with roughly 40% lower total cost
- to do
- Adopt Opus 5.5 for migration and audit workloads and leverage the 60%-cheaper cache-read tier for long-context agent workflows
key points
- Opus 5.5 tops benchmarks, output 30%+ faster than Opus 5, migrates 680K-line codebase in a day
- API price drops 20% to $4/$20 per M tokens; cache reads cut 60% to $0.20 per M tokens
- First Opus with Fable 5.1-level safety guardrails; Sonnet 5.5 and Haiku 5.5 arrive in weeks
#claude opus 5.5#benchmark testing#api pricing#coding capability5 sources · confidence high
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