GPT-5.4 nano (Xhigh) vs GPT-5.5 (High)
Which is better for the money: GPT-5.4 nano (Xhigh) by OpenAI or GPT-5.5 (High) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-26.
Trade-off
Verdict
Depends on your budget
GPT-5.5 (High) scores 16.3 points higher (37.0 vs 20.7) but costs 10× as much to run the benchmark ($3411 vs $331; flagship vs mid-range cost classes). They are not alternatives at one budget: pick GPT-5.5 (High) when you need intelligence above 20.7, and GPT-5.4 nano (Xhigh) when 20.7 is enough.
| Metric | GPT-5.4 nano (Xhigh) | GPT-5.5 (High) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 20.7 | 37.0 | +78.7% GPT-5.5 (High) is 78.7% more intelligent |
| Total AA cost (lower is better) | $331.24 | $3,410.76 | +929.7% GPT-5.5 (High) is 10× more expensive |
| End-to-end time (lower is better) | 80.67s | 20.75s | −74.3% GPT-5.5 (High) is 74.3% faster |
| Price per 1M tokens (in / out) | $0.20 / $1.25 | $5.00 / $30.0 | |
| Input modalities | Text, Image | Text, Image |
GPT-5.5 (High) vs GPT-5.4 nano (Xhigh): 78.7% more intelligence, 929.7% more cost to run the AA benchmark, and 74.3% faster end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-5.4 nano (Xhigh) is off the frontier: at the same or lower cost, MiMo-V2.6-Pro scores 46.30 for $207.
- GPT-5.5 (High) is off the frontier: at the same or lower cost, Kimi K3.1 Pro scores 55.10 for $3117.
GPT-5.4 nano (Xhigh)GPT-5.5 (High)Today's Pareto frontierEvery other model
Matchup
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Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/gpt-5-4-nano/gpt-5-5-high · Markdown: /api/v1/compare/gpt-5-4-nano/gpt-5-5-high?format=md · llms.txt · agent skill