gpt-5-chat vs gpt-5.4 Benchmark Comparison
Direct benchmark comparison between gpt-5-chat 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-chat |
1427 |
$0.00000125 |
95 |
| gpt-5.4 |
1468 |
$0.0000025 |
48 |
*These models represent the Pareto Frontier (optimal cost-to-performance).*
Comparison Summary: gpt-5.4 is the more capable model in this pair, leading by 41 Elo points. However, neither model is currently Pareto-optimal. Developers looking for peak efficiency should investigate gemini-3-flash, which offers a superior benchmark-to-price ratio.