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DeepSeek V4 Flash vs GPT-5.4

GPT-5.4 leads in 3 of 8 categories

Arena ELO

GPT-5.4

Cheaper

DeepSeek V4 Flash

Faster

GPT-5.4

Detailed Comparison

CategoryDeepSeek V4 FlashGPT-5.4
ProviderDeepSeek OpenAI
Context Window128K 1M WIN
Input Price ($/1M)$0.14 WIN$3
Output Price ($/1M)$0.28 WIN$15
Arena ELON/A 1560 WIN
CodingN/A unknown
ReasoningN/A unknown
Speed (tokens/sec)N/A ~50 t/s WIN
Open SourceYes No

Frequently Asked Questions

Which is cheaper, DeepSeek V4 Flash or GPT-5.4?

DeepSeek V4 Flash is approximately 98% cheaper than GPT-5.4 per million tokens.

Which is better for coding, DeepSeek V4 Flash or GPT-5.4?

DeepSeek V4 Flash scores N/A on coding benchmarks, while GPT-5.4 scores unknown.

Which has a larger context window?

DeepSeek V4 Flash supports 128K context, while GPT-5.4 supports 1M.

Is DeepSeek V4 Flash or GPT-5.4 open source?

DeepSeek V4 Flash is open source. GPT-5.4 is proprietary.