GPT-6 Luna (Xhigh) vs gpt-oss-20b (High)
Which is better for the money: GPT-6 Luna (Xhigh) by OpenAI or gpt-oss-20b (High) by OpenAI? 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-6 Luna (Xhigh) scores 25.6 points higher (34.6 vs 9.0) but costs 2.3× as much to run the benchmark ($66.8 vs $28.8; mid-range vs budget cost classes). Pick GPT-6 Luna (Xhigh) when the extra intelligence is worth the premium, otherwise gpt-oss-20b (High).
| Metric | GPT-6 Luna (Xhigh) | gpt-oss-20b (High) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 34.6 | 9.0 | −74.0% gpt-oss-20b (High) is 74.0% less intelligent |
| Total AA cost (lower is better) | $66.81 | $28.81 | −56.9% gpt-oss-20b (High) is 56.9% cheaper |
| End-to-end time (lower is better) | 21.27s | 16.79s | −21.1% gpt-oss-20b (High) is 21.1% faster |
| Price per 1M tokens (in / out) | $0.10 / $0.50 | $0.05 / $0.22 | |
| Input modalities | Text, Image | Text |
gpt-oss-20b (High) vs GPT-6 Luna (Xhigh): 74.0% less intelligence, 56.9% less cost to run the AA benchmark, and 21.1% faster end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-6 Luna (Xhigh) is on today's frontier: nothing is both smarter and cheaper.
- gpt-oss-20b (High) is off the frontier: at the same or lower cost, GPT-6 Luna (Low) scores 21.50 for $10.6.
GPT-6 Luna (Xhigh)gpt-oss-20b (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-6-luna-xhigh/gpt-oss-20b · Markdown: /api/v1/compare/gpt-6-luna-xhigh/gpt-oss-20b?format=md · llms.txt · agent skill