gpt-oss-120b (High) vs Grok 4.5 (High)
Which is better for the money: gpt-oss-120b (High) 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
Grok 4.5 (High) scores 27.2 points higher (38.8 vs 11.6) but costs 10× as much to run the benchmark ($1244 vs $123; premium vs mid-range cost classes). They are not alternatives at one budget: pick Grok 4.5 (High) when you need intelligence above 11.6, and gpt-oss-120b (High) when 11.6 is enough.
| Metric | gpt-oss-120b (High) | Grok 4.5 (High) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 11.6 | 38.8 | +234.5% Grok 4.5 (High) is 3.3× more intelligent |
| Total AA cost (lower is better) | $122.71 | $1,243.85 | +913.7% Grok 4.5 (High) is 10× more expensive |
| End-to-end time (lower is better) | 12.38s | 18.82s | +52.0% Grok 4.5 (High) is 52.0% slower |
| Price per 1M tokens (in / out) | $0.15 / $0.60 | $2.00 / $6.00 | |
| Input modalities | Text | Text, Image |
Grok 4.5 (High) vs gpt-oss-120b (High): 234.5% more intelligence, 913.7% more cost to run the AA benchmark, and 52.0% slower end-to-end.
Today's Pareto frontier
Against the frontier
- gpt-oss-120b (High) is off the frontier: at the same or lower cost, GPT-6 Luna (Max) scores 38.10 for $122.
- 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-oss-120b (High)Grok 4.5 (High)Today's Pareto frontierOpen-weights frontierEvery other model
Matchup
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Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/gpt-oss-120b/grok-4-5 · Markdown: /api/v1/compare/gpt-oss-120b/grok-4-5?format=md · llms.txt · agent skill