Claude Opus 5.5 (Low, Default Fallback) vs GPT-5.5 (High)
Which is better for the money: Claude Opus 5.5 (Low, Default Fallback) by Anthropic or GPT-5.5 (High) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-26.
Clear winner
Verdict
Pick Claude Opus 5.5 (Low, Default Fallback)
GPT-5.5 (High) vs Claude Opus 5.5 (Low, Default Fallback): 12.5% less intelligence, 296.4% more cost to run the AA benchmark, and 80.1% slower end-to-end.
| Metric | Claude Opus 5.5 (Low, Default Fallback) | GPT-5.5 (High) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 42.3 | 37.0 | −12.5% GPT-5.5 (High) is 12.5% less intelligent |
| Total AA cost (lower is better) | $860.33 | $3,410.76 | +296.4% GPT-5.5 (High) is 4.0× more expensive |
| End-to-end time (lower is better) | 11.52s | 20.75s | +80.1% GPT-5.5 (High) is 80.1% slower |
| Price per 1M tokens (in / out) | $4.00 / $20.0 | $5.00 / $30.0 | |
| Input modalities | Text, Image | Text, Image |
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-5.5 (High) is off the frontier: at the same or lower cost, Kimi K3.1 Pro scores 55.10 for $3117.
Claude Opus 5.5 (Low, Default Fallback)GPT-5.5 (High)Today's Pareto 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-low/gpt-5-5-high · Markdown: /api/v1/compare/claude-opus-5-5-low/gpt-5-5-high?format=md · llms.txt · agent skill