GPT-6 Astra (Xhigh) vs Grok 4.6 (Xhigh)
Which is better for the money: GPT-6 Astra (Xhigh) by OpenAI or Grok 4.6 (Xhigh) by SpaceXAI? 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 8.2 points higher (52.4 vs 44.2) but costs 1.7× as much to run the benchmark ($3803 vs $2242; both flagship class). Pick GPT-6 Astra (Xhigh) when the extra intelligence is worth the premium, otherwise Grok 4.6 (Xhigh).
| Metric | GPT-6 Astra (Xhigh) | Grok 4.6 (Xhigh) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 52.4 | 44.2 | −15.6% Grok 4.6 (Xhigh) is 15.6% less intelligent |
| Total AA cost (lower is better) | $3,802.98 | $2,241.91 | −41.0% Grok 4.6 (Xhigh) is 41.0% cheaper |
| End-to-end time (lower is better) | 188.57s | 47.23s | −75.0% Grok 4.6 (Xhigh) is 75.0% faster |
| Price per 1M tokens (in / out) | $10.0 / $50.0 | $2.00 / $6.00 | |
| Input modalities | Text, Image | Text, Image |
Grok 4.6 (Xhigh) vs GPT-6 Astra (Xhigh): 15.6% less intelligence, 41.0% less cost to run the AA benchmark, and 75.0% 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.
- Grok 4.6 (Xhigh) is off the frontier: at the same or lower cost, Claude Opus 5.5 (High, Default Fallback) scores 53.60 for $2172.
GPT-6 Astra (Xhigh)Grok 4.6 (Xhigh)Today's Pareto frontierEvery other model
Matchup
Compare something else
Agents:
Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/gpt-6-astra-xhigh/grok-4-6-xhigh · Markdown: /api/v1/compare/gpt-6-astra-xhigh/grok-4-6-xhigh?format=md · llms.txt · agent skill