Claude Opus 5.5 (Low, Default Fallback) vs GPT-5.6 Terra (Low)
Which is better for the money: Claude Opus 5.5 (Low, Default Fallback) by Anthropic or GPT-5.6 Terra (Low) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-27.
Trade-off
Verdict
Depends on your budget
Claude Opus 5.5 (Low, Default Fallback) scores 14.8 points higher (42.3 vs 27.5) but costs 2.5× as much to run the benchmark ($860 vs $350; premium vs mid-range cost classes). Pick Claude Opus 5.5 (Low, Default Fallback) when the extra intelligence is worth the premium, otherwise GPT-5.6 Terra (Low).
| Metric | Claude Opus 5.5 (Low, Default Fallback) | GPT-5.6 Terra (Low) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 42.3 | 27.5 | −35.0% GPT-5.6 Terra (Low) is 35.0% less intelligent |
| Total AA cost (lower is better) | $860.33 | $350.36 | −59.3% GPT-5.6 Terra (Low) is 59.3% cheaper |
| End-to-end time (lower is better) | 15.06s | 5.49s | −63.5% GPT-5.6 Terra (Low) is 63.5% faster |
| Price per 1M tokens (in / out) | $4.00 / $20.0 | $2.00 / $12.0 | |
| Input modalities | Text, Image | Text, Image |
GPT-5.6 Terra (Low) vs Claude Opus 5.5 (Low, Default Fallback): 35.0% less intelligence, 59.3% less cost to run the AA benchmark, and 63.5% faster end-to-end.
Today's Pareto frontier
Against the frontier
- Claude Opus 5.5 (Low, Default Fallback) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Xhigh) scores 51.00 for $662.
- GPT-5.6 Terra (Low) is off the frontier: at the same or lower cost, MiMo-V2.6-Pro scores 46.30 for $207.
Claude Opus 5.5 (Low, Default Fallback)GPT-5.6 Terra (Low)Today's Pareto frontierEvery other model
Matchup
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