Claude Sonnet 5 (Low) vs GPT-5.6 Terra (High)
Which is better for the money: Claude Sonnet 5 (Low) by Anthropic or GPT-5.6 Terra (High) by OpenAI? 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 9.9 points higher (34.2 vs 24.3) but costs 1.2× as much to run the benchmark ($768 vs $653; both premium class). Pick GPT-5.6 Terra (High) when the extra intelligence is worth the premium, otherwise Claude Sonnet 5 (Low).
| Metric | Claude Sonnet 5 (Low) | GPT-5.6 Terra (High) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 24.3 | 34.2 | +40.7% GPT-5.6 Terra (High) is 40.7% more intelligent |
| Total AA cost (lower is better) | $652.70 | $767.78 | +17.6% GPT-5.6 Terra (High) is 17.6% more expensive |
| End-to-end time (lower is better) | 9.14s | 6.58s | −28.0% GPT-5.6 Terra (High) is 28.0% faster |
| Price per 1M tokens (in / out) | $2.00 / $10.0 | $2.00 / $12.0 | |
| Input modalities | Text, Image | Text, Image |
GPT-5.6 Terra (High) vs Claude Sonnet 5 (Low): 40.7% more intelligence, 17.6% more cost to run the AA benchmark, and 28.0% faster end-to-end.
Today's Pareto frontier
Against the frontier
- Claude Sonnet 5 (Low) 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) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Xhigh) scores 51.00 for $662.
Claude Sonnet 5 (Low)GPT-5.6 Terra (High)Today's Pareto 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-low/gpt-5-6-terra-high · Markdown: /api/v1/compare/claude-sonnet-5-low/gpt-5-6-terra-high?format=md · llms.txt · agent skill