Performance Benchmarks for grok-4.3

Analyze how grok-4.3 stacks up against other frontier models in terms of cost-to-performance and raw intelligence (LMArena Elo).

2026 Performance Summary

🚀 Intelligence (Elo): 1456
💰 API Cost (Input): $0.00000125 / 1M tokens
⚡ API Cost (Output): $0.0000025 / 1M tokens
⏱️ Real-world Throughput: 71 tokens/s

Analysis: While grok-4.3 is a capable model, it is currently outperformed in efficiency by claude-opus-4-7-thinking. claude-opus-4-7-thinking sits higher on the Pareto line, offering approximately 47 points more intelligence (Elo) for a comparable or lower API cost.

Highly Recommended Alternatives

Frontier Model	LMArena Elo	API Cost (1M)	Throughput
claude-opus-4-7-thinking	1503	$0.000005	51
gemini-3.1-pro-preview	1493	$0.000002	80
grok-4.20-beta-0309-reasoning	1477	$0.00000125	68
gemini-3-flash	1474	$5e-7	78
deepseek-v4-pro	1463	$4.35e-7	29

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