gpt-5.5 vs gpt-5.4 Benchmark Comparison
Direct benchmark comparison between gpt-5.5 and gpt-5.4 based on LMArena Elo and the latest 2026 API pricing.
Direct Technical & Pricing Comparison
| Frontier Model |
LMArena Elo |
API Cost (1M) |
Throughput |
| gpt-5.5 |
1477 |
$0.00000125 |
31 |
| gpt-5.4 |
1467 |
$0.0000025 |
54 |
*These models represent the Pareto Frontier (optimal cost-to-performance).*
Comparison Summary: These models are highly competitive, with a negligible Elo gap of only 10 points. The choice between them should be driven by specific API features or provider preference. Specifically, gpt-5.5 is currently on the Pareto line, suggesting it offers better systemic value for its performance tier.