X-ai vs Anthropic

Battle of the providers: Comparing the frontier models from both X-ai and Anthropic to find the best cost-to-performance leaders.

Cross-Provider Frontier Leaders

Frontier Model	LMArena Elo	API Cost (1M)	Throughput
claude-opus-4-6-thinking	1504	$0.000005	31
grok-4.20-beta-0309-reasoning	1481	$0.000002	144
grok-4-1-fast-reasoning	1431	$2e-7	88

*These models represent the Pareto Frontier (optimal cost-to-performance).*