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Claude Sonnet 4.6 vs DeepSeek V4 Flash

Claude Sonnet 4.6 leads in 3 of 8 categories

Arena ELO

Claude Sonnet 4.6

Cheaper

DeepSeek V4 Flash

Faster

Claude Sonnet 4.6

Detailed Comparison

CategoryClaude Sonnet 4.6DeepSeek V4 Flash
ProviderAnthropic DeepSeek
Context Window1M WIN128K
Input Price ($/1M)$2 $0.14 WIN
Output Price ($/1M)$12 $0.28 WIN
Arena ELO1440 WINN/A
Coding79.6% SWE-bench N/A
Reasoning72.5% OSWorld N/A
Speed (tokens/sec)~80 t/s WINN/A
Open SourceNo Yes

Frequently Asked Questions

Which is cheaper, Claude Sonnet 4.6 or DeepSeek V4 Flash?

DeepSeek V4 Flash is approximately 97% cheaper than Claude Sonnet 4.6 per million tokens.

Which is better for coding, Claude Sonnet 4.6 or DeepSeek V4 Flash?

Claude Sonnet 4.6 scores 79.6% SWE-bench on coding benchmarks, while DeepSeek V4 Flash scores N/A.

Which has a larger context window?

Claude Sonnet 4.6 supports 1M context, while DeepSeek V4 Flash supports 128K.

Is Claude Sonnet 4.6 or DeepSeek V4 Flash open source?

Claude Sonnet 4.6 is proprietary. DeepSeek V4 Flash is open source.

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