Claude Opus 5.5 (Medium, Default Fallback) vs LongCat 2.0
Which is better for the money: Claude Opus 5.5 (Medium, Default Fallback) by Anthropic or LongCat 2.0 by LongCat? 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 5.5 (Medium, Default Fallba… scores 32.1 points higher (51.2 vs 19.1) but costs 3.0× as much to run the benchmark ($1627 vs $545; both premium class). Pick Claude Opus 5.5 (Medium, Default Fallba… when the extra intelligence is worth the premium, otherwise LongCat 2.0.
| Metric | Claude Opus 5.5 (Medium, Default Fallback) | LongCat 2.0 | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 51.2 | 19.1 | −62.7% LongCat 2.0 is 62.7% less intelligent |
| Total AA cost (lower is better) | $1,626.81 | $544.74 | −66.5% LongCat 2.0 is 66.5% cheaper |
| End-to-end time (lower is better) | 17.57s | 35.51s | +102.1% LongCat 2.0 is 102.1% slower |
| Price per 1M tokens (in / out) | $4.00 / $20.0 | $0.75 / $2.95 | |
| Input modalities | Text, Image | Text |
LongCat 2.0 vs Claude Opus 5.5 (Medium, Default Fallback): 62.7% less intelligence, 66.5% less cost to run the AA benchmark, and 102.1% slower end-to-end.
Today's Pareto frontier
Against the frontier
- Claude Opus 5.5 (Medium, Default Fallback) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
- LongCat 2.0 is off the frontier: at the same or lower cost, GPT-6.1 Sol (High) scores 50.20 for $521.
Claude Opus 5.5 (Medium, Default Fallback)LongCat 2.0Today'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/claude-opus-5-5-medium/longcat-2-0 · Markdown: /api/v1/compare/claude-opus-5-5-medium/longcat-2-0?format=md · llms.txt · agent skill