Claude Sonnet 5 (Xhigh) vs Kimi K2.6 (Reasoning)
Which is better for the money: Claude Sonnet 5 (Xhigh) by Anthropic or Kimi K2.6 (Reasoning) by Kimi? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-25.
Trade-off
Verdict
Depends on your budget
Claude Sonnet 5 (Xhigh) scores 7.4 points higher (34.4 vs 27.0) but costs 2.1× as much to run the benchmark ($3255 vs $1528; flagship vs premium cost classes). Pick Claude Sonnet 5 (Xhigh) when the extra intelligence is worth the premium, otherwise Kimi K2.6 (Reasoning).
| Metric | Claude Sonnet 5 (Xhigh) | Kimi K2.6 (Reasoning) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 34.4 | 27.0 | −21.5% Kimi K2.6 (Reasoning) is 21.5% less intelligent |
| Total AA cost (lower is better) | $3,255.40 | $1,528.20 | −53.1% Kimi K2.6 (Reasoning) is 53.1% cheaper |
| End-to-end time (lower is better) | 26.92s | 53.05s | +97.1% Kimi K2.6 (Reasoning) is 97.1% slower |
| Price per 1M tokens (in / out) | $2.00 / $10.0 | $0.95 / $4.00 | |
| Input modalities | Text, Image | Text, Image, Video |
Kimi K2.6 (Reasoning) vs Claude Sonnet 5 (Xhigh): 21.5% less intelligence, 53.1% less cost to run the AA benchmark, and 97.1% slower end-to-end.
Today's Pareto frontier
Against the frontier
- Claude Sonnet 5 (Xhigh) is off the frontier: at the same or lower cost, Kimi K3.1 Pro scores 55.10 for $3117.
- Kimi K2.6 (Reasoning) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
Claude Sonnet 5 (Xhigh)Kimi K2.6 (Reasoning)Today's Pareto frontierOpen-weights frontierEvery other model
Matchup
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Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/claude-sonnet-5-xhigh/kimi-k2-6 · Markdown: /api/v1/compare/claude-sonnet-5-xhigh/kimi-k2-6?format=md · llms.txt · agent skill