Claude Fable 5 (Max, Opus 4.8 Fallback) vs Gemini 3.1 Pro Preview
Which is better for the money: Claude Fable 5 (Max, Opus 4.8 Fallback) by Anthropic or Gemini 3.1 Pro Preview by Google? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-25.
Depends on your budget
Claude Fable 5 (Max, Opus 4.8 Fallback) scores 19.9 points higher (49.6 vs 29.7) but costs 5.8× as much to run the benchmark ($11161 vs $1935; flagship vs premium cost classes). They are not alternatives at one budget: pick Claude Fable 5 (Max, Opus 4.8 Fallback) when you need intelligence above 29.7, and Gemini 3.1 Pro Preview when 29.7 is enough.
| Metric | Claude Fable 5 (Max, Opus 4.8 Fallback) | Gemini 3.1 Pro Preview | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 49.6 | 29.7 | −40.1% Gemini 3.1 Pro Preview is 40.1% less intelligent |
| Total AA cost (lower is better) | $11,160.86 | $1,935.39 | −82.7% Gemini 3.1 Pro Preview is 82.7% cheaper |
| End-to-end time (lower is better) | 85.37s | 25.04s | −70.7% Gemini 3.1 Pro Preview is 70.7% faster |
| Price per 1M tokens (in / out) | $10.0 / $50.0 | $2.00 / $12.0 | |
| Input modalities | Text, Image | Text, Image, Speech, Video |
Gemini 3.1 Pro Preview vs Claude Fable 5 (Max, Opus 4.8 Fallback): 40.1% less intelligence, 82.7% less cost to run the AA benchmark, and 70.7% faster end-to-end.
Against the frontier
- Claude Fable 5 (Max, Opus 4.8 Fallback) is off the frontier: at the same or lower cost, Claude Opus 5.5 (Max, Default Fallback) scores 57.60 for $8708.
- Gemini 3.1 Pro Preview is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
Compare something else
Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/claude-fable-5/gemini-3-1-pro-preview · Markdown: /api/v1/compare/claude-fable-5/gemini-3-1-pro-preview?format=md · llms.txt · agent skill