Performance Benchmarks for gpt-5.5

Analyze how gpt-5.5 stacks up against other frontier models in terms of cost-to-performance and raw intelligence (LMArena Elo).

2026 Performance Summary

🚀 Intelligence (Elo): 1475
💰 API Cost (Input): $0.00000125 / 1M tokens
⚡ API Cost (Output): $0.00001 / 1M tokens
⏱️ Real-world Throughput: 42 tokens/s

Analysis: gpt-5.5 is currently positioned on the Pareto Frontier. This means it offers a unique and optimal balance between intelligence (Elo: 1475) and cost ($0.00000125/1M tokens), making it a top-tier choice for its price bracket.

Highly Recommended Alternatives

Frontier Model	LMArena Elo	API Cost (1M)	Throughput
gemini-3.1-pro-preview	1493	$0.000002	60
gpt-5.2-chat-latest-20260210	1477	$0.00000175	20
gemini-3-flash	1473	$5e-7	91
deepseek-v4-pro	1463	$4.35e-7	31
gemma-4-31b	1451	$1.3e-7	27

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