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Claude Opus 4.5 vs DeepSeek V4

Claude Opus 4.5 leads in 3 of 8 categories

Arena ELO

Claude Opus 4.5

Cheaper

DeepSeek V4

Faster

Claude Opus 4.5

Detailed Comparison

CategoryClaude Opus 4.5DeepSeek V4
ProviderAnthropic DeepSeek
Context Window200K WIN128K
Input Price ($/1M)$5 $0.435 WIN
Output Price ($/1M)$25 $0.87 WIN
Arena ELO1380 WINN/A
Coding80.9% SWE-bench N/A
Reasoningunknown N/A
Speed (tokens/sec)~35 t/s WINN/A
Open SourceNo Yes

Frequently Asked Questions

Which is cheaper, Claude Opus 4.5 or DeepSeek V4?

DeepSeek V4 is approximately 96% cheaper than Claude Opus 4.5 per million tokens.

Which is better for coding, Claude Opus 4.5 or DeepSeek V4?

Claude Opus 4.5 scores 80.9% SWE-bench on coding benchmarks, while DeepSeek V4 scores N/A.

Which has a larger context window?

Claude Opus 4.5 supports 200K context, while DeepSeek V4 supports 128K.

Is Claude Opus 4.5 or DeepSeek V4 open source?

Claude Opus 4.5 is proprietary. DeepSeek V4 is open source.

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