GPT-5.6 Sol (Xhigh) vs Grok 4.5 (High)
Which is better for the money: GPT-5.6 Sol (Xhigh) by OpenAI or Grok 4.5 (High) by SpaceXAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-24.
Trade-off
Verdict
Depends on your budget
GPT-5.6 Sol (Xhigh) scores 5.2 points higher (44.0 vs 38.8) but costs 1.7× as much to run the benchmark ($2082 vs $1244; flagship vs premium cost classes). Pick GPT-5.6 Sol (Xhigh) when the extra intelligence is worth the premium, otherwise Grok 4.5 (High).
| Metric | GPT-5.6 Sol (Xhigh) | Grok 4.5 (High) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 44.0 | 38.8 | −11.8% Grok 4.5 (High) is 11.8% less intelligent |
| Total AA cost (lower is better) | $2,082.28 | $1,243.85 | −40.3% Grok 4.5 (High) is 40.3% cheaper |
| End-to-end time (lower is better) | 28.41s | 18.82s | −33.8% Grok 4.5 (High) is 33.8% faster |
| Price per 1M tokens (in / out) | $4.00 / $20.0 | $2.00 / $6.00 | |
| Input modalities | Text, Image | Text, Image |
Grok 4.5 (High) vs GPT-5.6 Sol (Xhigh): 11.8% less intelligence, 40.3% less cost to run the AA benchmark, and 33.8% faster end-to-end.
Today's Pareto frontier
Against the frontier
- 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.
- Grok 4.5 (High) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
GPT-5.6 Sol (Xhigh)Grok 4.5 (High)Today's Pareto frontierEvery other model
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Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/gpt-5-6-sol-xhigh/grok-4-5 · Markdown: /api/v1/compare/gpt-5-6-sol-xhigh/grok-4-5?format=md · llms.txt · agent skill