Gemini 1.5 Flash vs DeepSeek-V4

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

Gemini 1.5 Flash

Google

AI Mastery Index80.2

LMSYS Arena1220

Technical (MMLU-Pro)81.2%

Cost per 1M Tokens$0.075

DeepSeek-V4

DeepSeek

AI Mastery Index91.8

LMSYS Arena1290

Technical (MMLU-Pro)91.8%

Cost per 1M Tokens$0.14

Architect's Verdict

When comparing Gemini 1.5 Flash and DeepSeek-V4, DeepSeek-V4 edges out in overall capabilities according to the AI Mastery Index. However, for cost-sensitive workloads, Gemini 1.5 Flash offers a more economical API at $0.075 per 1M tokens. Your choice should depend heavily on whether you prioritize raw reasoning (MMLU) or scalable deployment economics.