GPT-6 Luna (High) vs gpt-oss-20b (High)
Which is better for the money: GPT-6 Luna (High) 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 (High) scores 23.9 points higher (32.9 vs 9.0) but costs 1.7× as much to run the benchmark ($47.9 vs $28.8; both budget class). Pick GPT-6 Luna (High) when the extra intelligence is worth the premium, otherwise gpt-oss-20b (High).
| Metric | GPT-6 Luna (High) | gpt-oss-20b (High) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 32.9 | 9.0 | −72.6% gpt-oss-20b (High) is 72.6% less intelligent |
| Total AA cost (lower is better) | $47.85 | $28.81 | −39.8% gpt-oss-20b (High) is 39.8% cheaper |
| End-to-end time (lower is better) | 12.43s | 16.79s | +35.1% gpt-oss-20b (High) is 35.1% slower |
| 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 (High): 72.6% less intelligence, 39.8% less cost to run the AA benchmark, and 35.1% slower end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-6 Luna (High) 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 (High)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-high/gpt-oss-20b · Markdown: /api/v1/compare/gpt-6-luna-high/gpt-oss-20b?format=md · llms.txt · agent skill