claude-opus-4-5-20251101 vs grok-4.20-multi-agent-beta-0309 Benchmark Comparison

Direct benchmark comparison between claude-opus-4-5-20251101 and grok-4.20-multi-agent-beta-0309 based on LMArena Elo and the latest 2026 API pricing.

Direct Technical & Pricing Comparison

Frontier Model	LMArena Elo	API Cost (1M)	Throughput
claude-opus-4-5-20251101	1469	$0.000005	43
grok-4.20-multi-agent-beta-0309	1476	$0.000002	535.5

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

Comparison Summary: These models are highly competitive, with a negligible Elo gap of only 7 points. The choice between them should be driven by specific API features or provider preference.