GPT-6 Astra (Medium) vs Kimi K3.1 Pro
Which is better for the money: GPT-6 Astra (Medium) by OpenAI 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 5.5 points higher (55.1 vs 49.6) but costs 1.3× as much to run the benchmark ($3117 vs $2434; both flagship class). Pick Kimi K3.1 Pro when the extra intelligence is worth the premium, otherwise GPT-6 Astra (Medium).
| Metric | GPT-6 Astra (Medium) | Kimi K3.1 Pro | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 49.6 | 55.1 | +11.1% Kimi K3.1 Pro is 11.1% more intelligent |
| Total AA cost (lower is better) | $2,434.12 | $3,117.31 | +28.1% Kimi K3.1 Pro is 28.1% more expensive |
| End-to-end time (lower is better) | 14.48s | 42.64s | +194.5% Kimi K3.1 Pro is 194.5% slower |
| Price per 1M tokens (in / out) | $10.0 / $50.0 | $2.00 / $10.0 | |
| Input modalities | Text, Image | Text, Image |
Kimi K3.1 Pro vs GPT-6 Astra (Medium): 11.1% more intelligence, 28.1% more cost to run the AA benchmark, and 194.5% slower end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-6 Astra (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.
GPT-6 Astra (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/gpt-6-astra-medium/kimi-k3-1-pro · Markdown: /api/v1/compare/gpt-6-astra-medium/kimi-k3-1-pro?format=md · llms.txt · agent skill