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Claude Opus 4.6 vs DeepSeek V4 Flash

Claude Opus 4.6 leads in 3 of 8 categories

Arena ELO

Claude Opus 4.6

Cheaper

DeepSeek V4 Flash

Faster

Claude Opus 4.6

Detailed Comparison

CategoryClaude Opus 4.6DeepSeek V4 Flash
ProviderAnthropic DeepSeek
Context Window1M WIN128K
Input Price ($/1M)$5 $0.14 WIN
Output Price ($/1M)$25 $0.28 WIN
Arena ELO1561 WINN/A
Coding80.8% SWE-bench N/A
Reasoning65.4% Terminal-Bench N/A
Speed (tokens/sec)~40 t/s WINN/A
Open SourceNo Yes

Frequently Asked Questions

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

DeepSeek V4 Flash is approximately 99% cheaper than Claude Opus 4.6 per million tokens.

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

Claude Opus 4.6 scores 80.8% SWE-bench on coding benchmarks, while DeepSeek V4 Flash scores N/A.

Which has a larger context window?

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

Is Claude Opus 4.6 or DeepSeek V4 Flash open source?

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

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