Claude Opus 5.5 (Xhigh, Default Fallback) vs Kimi K3.1 Pro
Which is better for the money: Claude Opus 5.5 (Xhigh, 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 (Xhigh, Default Fallbac… scores 0.9 points higher (56.0 vs 55.1) but costs 1.3× as much to run the benchmark ($4057 vs $3117; both flagship class). Pick Claude Opus 5.5 (Xhigh, Default Fallbac… when the extra intelligence is worth the premium, otherwise Kimi K3.1 Pro.
| Metric | Claude Opus 5.5 (Xhigh, Default Fallback) | Kimi K3.1 Pro | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 56.0 | 55.1 | −1.6% Kimi K3.1 Pro is 1.6% less intelligent |
| Total AA cost (lower is better) | $4,056.65 | $3,117.31 | −23.2% Kimi K3.1 Pro is 23.2% cheaper |
| End-to-end time (lower is better) | 123.06s | 42.64s | −65.4% Kimi K3.1 Pro is 65.4% 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 (Xhigh, Default Fallback): 1.6% less intelligence, 23.2% less cost to run the AA benchmark, and 65.4% faster end-to-end.
Today's Pareto frontier
Against the frontier
- Claude Opus 5.5 (Xhigh, 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 (Xhigh, Default Fallback)Kimi K3.1 ProToday's Pareto frontierEvery other model
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