Claude 2 vs Claude Sonnet 4.5
Compare Claude 2 and Claude Sonnet 4.5, both from Anthropic, context windows of 100K vs 200K, tested across 3 shared challenges. Updated April 2026.
Which is better, Claude 2 or Claude Sonnet 4.5?
Claude 2 and Claude Sonnet 4.5 are both competitive models. Claude 2 costs $11.02/M input tokens vs $3/M for Claude Sonnet 4.5. Context windows: 100K vs 200K tokens. Compare their real outputs side by side below.
Key Differences Between Claude 2 and Claude Sonnet 4.5
Claude 2 is made by anthropic while Claude Sonnet 4.5 is from anthropic. Claude 2 has a 100K token context window compared to Claude Sonnet 4.5's 200K. On pricing, Claude 2 costs $11.02/M input tokens vs $3/M for Claude Sonnet 4.5.
No community votes yet. On paper, Claude Sonnet 4.5 has the edge — newer, bigger context window.
Style Comparison
Claude Sonnet 4.5 uses 47.9x more hedging
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.
