Claude Sonnet 4.5

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Anthropic•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

Core Specs

200K
Context Window
64K
Max Output
✓
Reasoning
✗
Open Source
Multimodal Support
textimage

Scenario Scores

Coding
#6 / 1491
Writing
#8 / 1484
Translation
#9 / 1485
Data Analysis
#8 / 1484
Conversation
#5 / 1485
Image Gen
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User Feedback Highlights

Based on community feedback. Hover to see original reviews.

+ More generous quotas+ Strong coding ability+ Fast response− Slightly weaker creative writing+ Excellent value− Less capable than Opus for complex tasks
Sentiment:👍 82%😐 12%👎 6%

Pros & Cons

Pros

  • +Excellent value
  • +Strong coding ability
  • +Fast response
  • +More generous quotas

Cons

  • −Less capable than Opus for complex tasks
  • −Slightly weaker creative writing

Reliability

SLA99.9%
Incidents (30d)1
与 Opus 共享基础设施
View Status Page →

Pricing

Input (per 1M tokens)$3.00
Output (per 1M tokens)$15.00
Subscription$20/month
Free trial available
Updated on 2026-03-06

Tools Supporting This Model

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StackBlitz
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Open Source
CursorDefault
Anysphere
GitHub CopilotDefault
GitHub/Microsoft
LovableDefault
Lovable
ReplitDefault
Replit
v0Default
Vercel
Claude Code
Anthropic
Perplexity
Perplexity AI
Windsurf
Cognition AI

Compare with Others

Claude Sonnet 4.5 vs GPT-5.4 →Claude Sonnet 4.5 vs GPT-5.4 Thinking →Claude Sonnet 4.5 vs Claude Opus 4.6 →

Benchmarks

sweBench69%
mmlu90.5%
humanEval94.2%