GPT-5.5 (Xhigh) vs GPT-5.6 Sol (Medium)
Which is better for the money: GPT-5.5 (Xhigh) by OpenAI or GPT-5.6 Sol (Medium) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-25.
Clear winner
Verdict
Pick GPT-5.6 Sol (Medium)
GPT-5.6 Sol (Medium) vs GPT-5.5 (Xhigh): 2.1% more intelligence, 81.2% less cost to run the AA benchmark, and 81.2% faster end-to-end.
| Metric | GPT-5.5 (Xhigh) | GPT-5.6 Sol (Medium) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 38.4 | 39.2 | +2.1% GPT-5.6 Sol (Medium) is 2.1% more intelligent |
| Total AA cost (lower is better) | $5,294.36 | $997.39 | −81.2% GPT-5.6 Sol (Medium) is 81.2% cheaper |
| End-to-end time (lower is better) | 55.87s | 10.52s | −81.2% GPT-5.6 Sol (Medium) is 81.2% faster |
| 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 (Xhigh) is off the frontier: at the same or lower cost, Claude Opus 5.5 (Xhigh, Default Fallback) scores 56.00 for $4057.
- GPT-5.6 Sol (Medium) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Xhigh) scores 51.00 for $662.
GPT-5.5 (Xhigh)GPT-5.6 Sol (Medium)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-5-5/gpt-5-6-sol-medium · Markdown: /api/v1/compare/gpt-5-5/gpt-5-6-sol-medium?format=md · llms.txt · agent skill