Claude 3.7 Sonnet vs DeepSeek V4 Flash
Compare Claude 3.7 Sonnet by Anthropic against DeepSeek V4 Flash by DeepSeek, context windows of 200K vs 1.0M, tested across 54 shared challenges. Updated April 2026.
Which is better, Claude 3.7 Sonnet or DeepSeek V4 Flash?
Claude 3.7 Sonnet and DeepSeek V4 Flash are both competitive models. Claude 3.7 Sonnet costs $3/M input tokens vs $0.14/M for DeepSeek V4 Flash. Context windows: 200K vs 1049K tokens. Compare their real outputs side by side below.
Key Differences Between Claude 3.7 Sonnet and DeepSeek V4 Flash
Claude 3.7 Sonnet is made by anthropic while DeepSeek V4 Flash is from deepseek. Claude 3.7 Sonnet has a 200K token context window compared to DeepSeek V4 Flash's 1049K. On pricing, Claude 3.7 Sonnet costs $3/M input tokens vs $0.14/M for DeepSeek V4 Flash.
Per 1M tokens
DeepSeek V4 Flash is cheaper on both — 21× input, 54× output
No community votes yet. On paper, DeepSeek V4 Flash has the edge — newer, bigger context window.
DeepSeek V4 Flash is 54x cheaper per token — worth considering if cost matters.
Style Comparison
Claude 3.7 Sonnet uses 4.3x more headings
