X-ai vs Openai

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

Cross-Provider Frontier Leaders

Frontier Model	LMArena Elo	API Cost (1M)	Throughput
grok-4.20-beta-0309-reasoning	1481	$0.000002	144
gpt-5.2-chat-latest-20260210	1479	$0.00000175	50
gpt-5.1	1439	$0.00000125	53
grok-4-1-fast-reasoning	1431	$2e-7	88
gpt-oss-120b	1354	$3.9e-8	52
gpt-oss-20b	1318	$3e-8	3

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