Claude Sonnet 4 vs DeepSeek V4 Flash
Compare Claude Sonnet 4 by Anthropic against DeepSeek V4 Flash by DeepSeek, context windows of 200K vs 1.0M, tested across 53 shared challenges. Updated April 2026.
Which is better, Claude Sonnet 4 or DeepSeek V4 Flash?
Claude Sonnet 4 and DeepSeek V4 Flash are both competitive models. Claude Sonnet 4 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 Sonnet 4 and DeepSeek V4 Flash
Claude Sonnet 4 is made by anthropic while DeepSeek V4 Flash is from deepseek. Claude Sonnet 4 has a 200K token context window compared to DeepSeek V4 Flash's 1049K. On pricing, Claude Sonnet 4 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 Sonnet 4 uses 87.9x more emoji
