GPT-5.6 Terra (High) vs LongCat 2.0
Which is better for the money: GPT-5.6 Terra (High) by OpenAI or LongCat 2.0 by LongCat? 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
GPT-5.6 Terra (High) scores 15.1 points higher (34.2 vs 19.1) but costs 1.4× as much to run the benchmark ($768 vs $545; both premium class). Pick GPT-5.6 Terra (High) when the extra intelligence is worth the premium, otherwise LongCat 2.0.
| Metric | GPT-5.6 Terra (High) | LongCat 2.0 | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 34.2 | 19.1 | −44.2% LongCat 2.0 is 44.2% less intelligent |
| Total AA cost (lower is better) | $767.78 | $544.74 | −29.0% LongCat 2.0 is 29.0% cheaper |
| End-to-end time (lower is better) | 6.43s | 37.67s | +485.8% LongCat 2.0 is 485.8% slower |
| Price per 1M tokens (in / out) | $2.00 / $12.0 | $0.75 / $2.95 | |
| Input modalities | Text, Image | Text |
LongCat 2.0 vs GPT-5.6 Terra (High): 44.2% less intelligence, 29.0% less cost to run the AA benchmark, and 485.8% slower end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-5.6 Terra (High) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Xhigh) scores 51.00 for $662.
- LongCat 2.0 is off the frontier: at the same or lower cost, GPT-6.1 Sol (High) scores 50.20 for $521.
GPT-5.6 Terra (High)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/gpt-5-6-terra-high/longcat-2-0 · Markdown: /api/v1/compare/gpt-5-6-terra-high/longcat-2-0?format=md · llms.txt · agent skill