Claude Opus 5.5 (Max, Default Fallback) vs Kimi K3.1 Pro
Which is better for the money: Claude Opus 5.5 (Max, Default Fallback) by Anthropic or Kimi K3.1 Pro by Kimi? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-24.
Trade-off
Verdict
Depends on your budget
Claude Opus 5.5 (Max, Default Fallback) scores 2.5 points higher (57.6 vs 55.1) but costs 2.8× as much to run the benchmark ($8708 vs $3117; both flagship class). Pick Claude Opus 5.5 (Max, Default Fallback) when the extra intelligence is worth the premium, otherwise Kimi K3.1 Pro.
| Metric | Claude Opus 5.5 (Max, Default Fallback) | Kimi K3.1 Pro | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 57.6 | 55.1 | −4.3% Kimi K3.1 Pro is 4.3% less intelligent |
| Total AA cost (lower is better) | $8,708.20 | $3,117.31 | −64.2% Kimi K3.1 Pro is 64.2% cheaper |
| End-to-end time (lower is better) | 626.13s | 42.64s | −93.2% Kimi K3.1 Pro is 93.2% faster |
| Price per 1M tokens (in / out) | $4.00 / $20.0 | $2.00 / $10.0 | |
| Input modalities | Text, Image | Text, Image |
Kimi K3.1 Pro vs Claude Opus 5.5 (Max, Default Fallback): 4.3% less intelligence, 64.2% less cost to run the AA benchmark, and 93.2% faster end-to-end.
Today's Pareto frontier
Against the frontier
- Claude Opus 5.5 (Max, Default Fallback) is on today's frontier: nothing is both smarter and cheaper.
- Kimi K3.1 Pro is on today's frontier: nothing is both smarter and cheaper.
Claude Opus 5.5 (Max, Default Fallback)Kimi K3.1 ProToday's Pareto frontierEvery other model
Matchup
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