DeepSeek-V4 vs Grok 4.5

Head-to-head technical comparison of intelligence, capabilities, and API pricing.

DeepSeek-V4

DeepSeek

AI Mastery Index91.8

LMSYS Arena1449

Technical (MMLU-Pro)91.8%

Cost per 1M Tokens$0.14

Grok 4.5

xAI

AI Mastery Index93.4

LMSYS Arena1465

Technical (MMLU-Pro)92.8%

Cost per 1M Tokens$2

Architect's Verdict

When comparing DeepSeek-V4 and Grok 4.5, Grok 4.5 edges out in overall capabilities according to the AI Mastery Index. However, for cost-sensitive workloads, DeepSeek-V4 offers a more economical API at $0.14 per 1M tokens. Your choice should depend heavily on whether you prioritize raw reasoning (MMLU) or scalable deployment economics.