Claude Sonnet 5 (Xhigh) vs gpt-oss-20b (High)
Which is better for the money: Claude Sonnet 5 (Xhigh) by Anthropic or gpt-oss-20b (High) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-26.
Trade-off
Verdict
Depends on your budget
Claude Sonnet 5 (Xhigh) scores 25.4 points higher (34.4 vs 9.0) but costs 113× as much to run the benchmark ($3255 vs $28.8; flagship vs budget cost classes). They are not alternatives at one budget: pick Claude Sonnet 5 (Xhigh) when you need intelligence above 9.0, and gpt-oss-20b (High) when 9.0 is enough.
| Metric | Claude Sonnet 5 (Xhigh) | gpt-oss-20b (High) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 34.4 | 9.0 | −73.8% gpt-oss-20b (High) is 73.8% less intelligent |
| Total AA cost (lower is better) | $3,255.40 | $28.81 | −99.1% gpt-oss-20b (High) is 99.1% cheaper |
| End-to-end time (lower is better) | 26.92s | 14.95s | −44.5% gpt-oss-20b (High) is 44.5% faster |
| Price per 1M tokens (in / out) | $2.00 / $10.0 | $0.05 / $0.22 | |
| Input modalities | Text, Image | Text |
gpt-oss-20b (High) vs Claude Sonnet 5 (Xhigh): 73.8% less intelligence, 99.1% less cost to run the AA benchmark, and 44.5% faster end-to-end.
Today's Pareto frontier
Against the frontier
- Claude Sonnet 5 (Xhigh) is off the frontier: at the same or lower cost, Kimi K3.1 Pro scores 55.10 for $3117.
- gpt-oss-20b (High) is off the frontier: at the same or lower cost, GPT-6 Luna (Low) scores 21.50 for $10.6.
Claude Sonnet 5 (Xhigh)gpt-oss-20b (High)Today's Pareto frontierOpen-weights frontierEvery other model
Matchup
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