GPT-6 Astra (Medium) vs Grok 4.3 (High)
Which is better for the money: GPT-6 Astra (Medium) by OpenAI or Grok 4.3 (High) by SpaceXAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-25.
Trade-off
Verdict
Depends on your budget
GPT-6 Astra (Medium) scores 24.7 points higher (49.6 vs 24.9) but costs 6.7× as much to run the benchmark ($2434 vs $363; flagship vs mid-range cost classes). They are not alternatives at one budget: pick GPT-6 Astra (Medium) when you need intelligence above 24.9, and Grok 4.3 (High) when 24.9 is enough.
| Metric | GPT-6 Astra (Medium) | Grok 4.3 (High) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 49.6 | 24.9 | −49.8% Grok 4.3 (High) is 49.8% less intelligent |
| Total AA cost (lower is better) | $2,434.12 | $363.24 | −85.1% Grok 4.3 (High) is 85.1% cheaper |
| End-to-end time (lower is better) | 14.07s | 28.87s | +105.2% Grok 4.3 (High) is 105.2% 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 (Medium): 49.8% less intelligence, 85.1% less cost to run the AA benchmark, and 105.2% 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.
- 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 (Medium)Grok 4.3 (High)Today'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/grok-4-3 · Markdown: /api/v1/compare/gpt-6-astra-medium/grok-4-3?format=md · llms.txt · agent skill