Grok 4.5 vs Mistral Large 3

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

Grok 4.5

xAI

AI Mastery Index93.4

LMSYS Arena1465

Technical (MMLU-Pro)92.8%

Cost per 1M Tokens$2

Mistral Large 3

Mistral

AI Mastery Index89.2

LMSYS Arena1430

Technical (MMLU-Pro)89.2%

Cost per 1M Tokens$0.5

Architect's Verdict

When comparing Grok 4.5 and Mistral Large 3, Grok 4.5 edges out in overall capabilities according to the AI Mastery Index. However, for cost-sensitive workloads, Mistral Large 3 offers a more economical API at $0.5 per 1M tokens. Your choice should depend heavily on whether you prioritize raw reasoning (MMLU) or scalable deployment economics.