Claude Opus 5 (Xhigh) vs Mercury 2
Which is better for the money: Claude Opus 5 (Xhigh) by Anthropic or Mercury 2 by Inception? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-25.
Trade-off
Verdict
Depends on your budget
Claude Opus 5 (Xhigh) scores 38.9 points higher (49.7 vs 10.8) but costs 56× as much to run the benchmark ($5868 vs $105; flagship vs mid-range cost classes). They are not alternatives at one budget: pick Claude Opus 5 (Xhigh) when you need intelligence above 10.8, and Mercury 2 when 10.8 is enough.
| Metric | Claude Opus 5 (Xhigh) | Mercury 2 | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 49.7 | 10.8 | −78.3% Mercury 2 is 78.3% less intelligent |
| Total AA cost (lower is better) | $5,867.76 | $104.94 | −98.2% Mercury 2 is 98.2% cheaper |
| End-to-end time (lower is better) | 35.31s | 6.56s | −81.4% Mercury 2 is 81.4% faster |
| Price per 1M tokens (in / out) | $5.00 / $25.0 | $0.25 / $0.75 | |
| Input modalities | Text, Image | Text |
Mercury 2 vs Claude Opus 5 (Xhigh): 78.3% less intelligence, 98.2% less cost to run the AA benchmark, and 81.4% faster end-to-end.
Today's Pareto frontier
Against the frontier
- Claude Opus 5 (Xhigh) is off the frontier: at the same or lower cost, Claude Opus 5.5 (Xhigh, Default Fallback) scores 56.00 for $4057.
- Mercury 2 is off the frontier: at the same or lower cost, Claude Haiku 5.5 (High) scores 37.80 for $94.1.
Claude Opus 5 (Xhigh)Mercury 2Today's Pareto frontierEvery other model
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Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/claude-opus-5-xhigh/mercury-2 · Markdown: /api/v1/compare/claude-opus-5-xhigh/mercury-2?format=md · llms.txt · agent skill