Claude Opus 5.5 (Medium, Default Fallback) vs Gemini 3.5 Flash (High)
Which is better for the money: Claude Opus 5.5 (Medium, Default Fallback) by Anthropic or Gemini 3.5 Flash (High) by Google? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-25.
Clear winner
Verdict
Pick Claude Opus 5.5 (Medium, Default Fallback)
Gemini 3.5 Flash (High) vs Claude Opus 5.5 (Medium, Default Fallback): 36.3% less intelligence, 159.5% more cost to run the AA benchmark, and 6.0% faster end-to-end.
| Metric | Claude Opus 5.5 (Medium, Default Fallback) | Gemini 3.5 Flash (High) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 51.2 | 32.6 | −36.3% Gemini 3.5 Flash (Hig… is 36.3% less intelligent |
| Total AA cost (lower is better) | $1,626.81 | $4,222.12 | +159.5% Gemini 3.5 Flash (Hig… is 2.6× more expensive |
| End-to-end time (lower is better) | 17.57s | 16.52s | −6.0% Gemini 3.5 Flash (Hig… is 6.0% faster |
| Price per 1M tokens (in / out) | $4.00 / $20.0 | $1.50 / $9.00 | |
| Input modalities | Text, Image | Text, Image, Speech, Video |
Today's Pareto frontier
Against the frontier
- Claude Opus 5.5 (Medium, Default Fallback) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
- Gemini 3.5 Flash (High) is off the frontier: at the same or lower cost, Claude Opus 5.5 (Xhigh, Default Fallback) scores 56.00 for $4057.
Claude Opus 5.5 (Medium, Default Fallback)Gemini 3.5 Flash (High)Today's Pareto frontierEvery other model
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Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/claude-opus-5-5-medium/gemini-3-5-flash · Markdown: /api/v1/compare/claude-opus-5-5-medium/gemini-3-5-flash?format=md · llms.txt · agent skill