Claude 3.7 Thinking Sonnet vs Claude Sonnet 4.5
Compare Claude 3.7 Thinking Sonnet and Claude Sonnet 4.5, both from Anthropic, context windows of 200K vs 200K, tested across 43 shared challenges. Updated April 2026.
Which is better, Claude 3.7 Thinking Sonnet or Claude Sonnet 4.5?
Claude 3.7 Thinking Sonnet and Claude Sonnet 4.5 are both competitive models. Claude 3.7 Thinking Sonnet costs $6/M input tokens vs $3/M for Claude Sonnet 4.5. Context windows: 200K vs 200K tokens. Compare their real outputs side by side below.
Key Differences Between Claude 3.7 Thinking Sonnet and Claude Sonnet 4.5
Claude 3.7 Thinking Sonnet is made by anthropic while Claude Sonnet 4.5 is from anthropic. Claude 3.7 Thinking Sonnet has a 200K token context window compared to Claude Sonnet 4.5's 200K. On pricing, Claude 3.7 Thinking Sonnet costs $6/M input tokens vs $3/M for Claude Sonnet 4.5.
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Style Comparison
Claude Sonnet 4.5 uses 45.2x more emoji
vsAsk them anything yourself
Some models write identically. You are paying for the brand.
178 models fingerprinted across 32 writing dimensions. Free research.
185x
price gap between models that write identically
178
models
12
clone pairs
32
dimensions
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
