GPT-5.5 (High) vs GPT-5.6 Sol (Xhigh)
Which is better for the money: GPT-5.5 (High) by OpenAI or GPT-5.6 Sol (Xhigh) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-26.
Clear winner
Verdict
Pick GPT-5.6 Sol (Xhigh)
GPT-5.6 Sol (Xhigh) vs GPT-5.5 (High): 18.9% more intelligence, 38.9% less cost to run the AA benchmark, and 71.2% slower end-to-end.
| Metric | GPT-5.5 (High) | GPT-5.6 Sol (Xhigh) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 37.0 | 44.0 | +18.9% GPT-5.6 Sol (Xhigh) is 18.9% more intelligent |
| Total AA cost (lower is better) | $3,410.76 | $2,082.28 | −38.9% GPT-5.6 Sol (Xhigh) is 38.9% cheaper |
| End-to-end time (lower is better) | 36.31s | 62.17s | +71.2% GPT-5.6 Sol (Xhigh) is 71.2% slower |
| Price per 1M tokens (in / out) | $5.00 / $30.0 | $4.00 / $20.0 | |
| Input modalities | Text, Image | Text, Image |
Today's Pareto frontier
Against the frontier
- GPT-5.5 (High) is off the frontier: at the same or lower cost, Kimi K3.1 Pro scores 55.10 for $3117.
- GPT-5.6 Sol (Xhigh) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
GPT-5.5 (High)GPT-5.6 Sol (Xhigh)Today's Pareto frontierEvery other model
Matchup
Compare something else
Agents:
Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/gpt-5-5-high/gpt-5-6-sol-xhigh · Markdown: /api/v1/compare/gpt-5-5-high/gpt-5-6-sol-xhigh?format=md · llms.txt · agent skill