Claude Opus 5 (Medium) vs Kimi K3.1 Pro
Which is better for the money: Claude Opus 5 (Medium) 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
Kimi K3.1 Pro scores 10.3 points higher (55.1 vs 44.8) but costs 1.1× as much to run the benchmark ($3117 vs $2732; both flagship class). Pick Kimi K3.1 Pro when the extra intelligence is worth the premium, otherwise Claude Opus 5 (Medium).
| Metric | Claude Opus 5 (Medium) | Kimi K3.1 Pro | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 44.8 | 55.1 | +23.0% Kimi K3.1 Pro is 23.0% more intelligent |
| Total AA cost (lower is better) | $2,731.91 | $3,117.31 | +14.1% Kimi K3.1 Pro is 14.1% more expensive |
| End-to-end time (lower is better) | 13.14s | 42.64s | +224.5% Kimi K3.1 Pro is 224.5% slower |
| Price per 1M tokens (in / out) | $5.00 / $25.0 | $2.00 / $10.0 | |
| Input modalities | Text, Image | Text, Image |
Kimi K3.1 Pro vs Claude Opus 5 (Medium): 23.0% more intelligence, 14.1% more cost to run the AA benchmark, and 224.5% slower end-to-end.
Today's Pareto frontier
Against the frontier
- Claude Opus 5 (Medium) is off the frontier: at the same or lower cost, Claude Opus 5.5 (High, Default Fallback) scores 53.60 for $2172.
- Kimi K3.1 Pro is on today's frontier: nothing is both smarter and cheaper.
Claude Opus 5 (Medium)Kimi K3.1 ProToday'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-medium/kimi-k3-1-pro · Markdown: /api/v1/compare/claude-opus-5-medium/kimi-k3-1-pro?format=md · llms.txt · agent skill