Claude Sonnet 4.5
FrontierAnthropic•Released on 2025-11-15
Anthropic's best value flagship, coding ability close to Opus at 1/5 the price. HN users praise its performance on daily coding tasks, popular choice for Cursor and similar tools.
86
Overall Score
Voice of the community
sample 1,567“Claude Sonnet 3.5 is vastly better than GPT-4o. Better for writing, better for code.”
Core Specs
200K
Context Window
64K
Max Output
ReasoningOpen Sourcetextimage
Scenario Scores
Pros & Cons
Sentiment82% +12% ·6% −
Pros
- +Excellent value
- +Strong coding ability
- +Fast response
- +More generous quotas
Cons
- −Less capable than Opus for complex tasks
- −Slightly weaker creative writing
Pricing
Input (per 1M tokens)$3.00
Output (per 1M tokens)$15.00
Subscription$20/month
Free trial available
Updated on 2026-03-06
Get Started with Claude Sonnet
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💡 Sonnet is available on the free tier.
Benchmarks
sweBench69%
mmlu90.5%
humanEval94.2%
Tools Supporting This Model
Reliability
SLA99.9%
Incidents (30d)2
Last Incident2026-05-04
与 Opus 共享基础设施；5/4 13:59-14:45 UTC (~46min) Sonnet 4.5 + Opus 4.5 同时 elevated errors，已 resolved (status.claude.com)
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