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Claude Opus 4.8 vs DeepSeek V4 Flash

Both models are evenly matched

Arena ELO

Claude Opus 4.8

Cheaper

DeepSeek V4 Flash

Faster

Tie

Detailed Comparison

CategoryClaude Opus 4.8DeepSeek V4 Flash
ProviderAnthropic DeepSeek
Context Window200K WIN128K
Input Price ($/1M)$5 $0.14 WIN
Output Price ($/1M)$25 $0.28 WIN
Arena ELO1580 WINN/A
CodingN/A N/A
ReasoningN/A N/A
Speed (tokens/sec)N/A N/A
Open SourceNo Yes

Frequently Asked Questions

Which is cheaper, Claude Opus 4.8 or DeepSeek V4 Flash?

DeepSeek V4 Flash is approximately 99% cheaper than Claude Opus 4.8 per million tokens.

Which has a larger context window?

Claude Opus 4.8 supports 200K context, while DeepSeek V4 Flash supports 128K.

Is Claude Opus 4.8 or DeepSeek V4 Flash open source?

Claude Opus 4.8 is proprietary. DeepSeek V4 Flash is open source.

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