GPT-6 Astra (Xhigh) vs Kimi K3 (Low)
Which is better for the money: GPT-6 Astra (Xhigh) by OpenAI or Kimi K3 (Low) by Kimi? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-26.
Trade-off
Verdict
Depends on your budget
GPT-6 Astra (Xhigh) scores 22.3 points higher (52.4 vs 30.1) but costs 3.2× as much to run the benchmark ($3803 vs $1190; flagship vs premium cost classes). They are not alternatives at one budget: pick GPT-6 Astra (Xhigh) when you need intelligence above 30.1, and Kimi K3 (Low) when 30.1 is enough.
| Metric | GPT-6 Astra (Xhigh) | Kimi K3 (Low) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 52.4 | 30.1 | −42.6% Kimi K3 (Low) is 42.6% less intelligent |
| Total AA cost (lower is better) | $3,802.98 | $1,190.42 | −68.7% Kimi K3 (Low) is 68.7% cheaper |
| End-to-end time (lower is better) | 176.59s | 49.80s | −71.8% Kimi K3 (Low) is 71.8% faster |
| Price per 1M tokens (in / out) | $10.0 / $50.0 | $3.00 / $15.0 | |
| Input modalities | Text, Image | Text, Image |
Kimi K3 (Low) vs GPT-6 Astra (Xhigh): 42.6% less intelligence, 68.7% less cost to run the AA benchmark, and 71.8% faster end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-6 Astra (Xhigh) is off the frontier: at the same or lower cost, Kimi K3.1 Pro scores 55.10 for $3117.
- Kimi K3 (Low) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
GPT-6 Astra (Xhigh)Kimi K3 (Low)Today's Pareto frontierOpen-weights frontierEvery other model
Matchup
Compare something else
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Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/gpt-6-astra-xhigh/kimi-k3-low · Markdown: /api/v1/compare/gpt-6-astra-xhigh/kimi-k3-low?format=md · llms.txt · agent skill