GPT-6 Astra (Low) vs Grok 4.3 (High)
Which is better for the money: GPT-6 Astra (Low) by OpenAI or Grok 4.3 (High) 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 (Low) scores 20.9 points higher (45.8 vs 24.9) but costs 4.2× as much to run the benchmark ($1537 vs $363; premium vs mid-range cost classes). They are not alternatives at one budget: pick GPT-6 Astra (Low) when you need intelligence above 24.9, and Grok 4.3 (High) when 24.9 is enough.
| Metric | GPT-6 Astra (Low) | Grok 4.3 (High) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 45.8 | 24.9 | −45.6% Grok 4.3 (High) is 45.6% less intelligent |
| Total AA cost (lower is better) | $1,536.78 | $363.24 | −76.4% Grok 4.3 (High) is 76.4% cheaper |
| End-to-end time (lower is better) | 12.01s | 30.35s | +152.7% Grok 4.3 (High) is 152.7% slower |
| Price per 1M tokens (in / out) | $10.0 / $50.0 | $1.25 / $2.50 | |
| Input modalities | Text, Image | Text, Image |
Grok 4.3 (High) vs GPT-6 Astra (Low): 45.6% less intelligence, 76.4% less cost to run the AA benchmark, and 152.7% slower end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-6 Astra (Low) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
- Grok 4.3 (High) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Medium) scores 47.80 for $361.
GPT-6 Astra (Low)Grok 4.3 (High)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-low/grok-4-3 · Markdown: /api/v1/compare/gpt-6-astra-low/grok-4-3?format=md · llms.txt · agent skill