Claude Sonnet 5 (Max) vs LongCat 2.0
Which is better for the money: Claude Sonnet 5 (Max) by Anthropic or LongCat 2.0 by LongCat? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-24.
Trade-off
Verdict
Depends on your budget
Claude Sonnet 5 (Max) scores 19.1 points higher (38.2 vs 19.1) but costs 13× as much to run the benchmark ($6998 vs $545; flagship vs premium cost classes). They are not alternatives at one budget: pick Claude Sonnet 5 (Max) when you need intelligence above 19.1, and LongCat 2.0 when 19.1 is enough.
| Metric | Claude Sonnet 5 (Max) | LongCat 2.0 | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 38.2 | 19.1 | −50.0% LongCat 2.0 is 50.0% less intelligent |
| Total AA cost (lower is better) | $6,998.25 | $544.74 | −92.2% LongCat 2.0 is 92.2% cheaper |
| End-to-end time (lower is better) | 183.62s | 35.54s | −80.6% LongCat 2.0 is 80.6% faster |
| Price per 1M tokens (in / out) | $2.00 / $10.0 | $0.75 / $2.95 | |
| Input modalities | Text, Image | Text |
LongCat 2.0 vs Claude Sonnet 5 (Max): 50.0% less intelligence, 92.2% less cost to run the AA benchmark, and 80.6% faster end-to-end.
Today's Pareto frontier
Against the frontier
- Claude Sonnet 5 (Max) is off the frontier: at the same or lower cost, Claude Opus 5.5 (Xhigh, Default Fallback) scores 56.00 for $4057.
- LongCat 2.0 is off the frontier: at the same or lower cost, GPT-6.1 Sol (High) scores 50.20 for $521.
Claude Sonnet 5 (Max)LongCat 2.0Today's Pareto frontierOpen-weights frontierEvery other model
Matchup
Compare something else
Agents:
Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/claude-sonnet-5/longcat-2-0 · Markdown: /api/v1/compare/claude-sonnet-5/longcat-2-0?format=md · llms.txt · agent skill