GPT-6 Astra (Medium) vs Grok 4.3 (Non-reasoning)
Which is better for the money: GPT-6 Astra (Medium) by OpenAI or Grok 4.3 (Non-reasoning) 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 (Medium) scores 35.6 points higher (49.6 vs 14.0) but costs 9.7× as much to run the benchmark ($2434 vs $250; flagship vs mid-range cost classes). They are not alternatives at one budget: pick GPT-6 Astra (Medium) when you need intelligence above 14.0, and Grok 4.3 (Non-reasoning) when 14.0 is enough.
| Metric | GPT-6 Astra (Medium) | Grok 4.3 (Non-reasoning) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 49.6 | 14.0 | −71.8% Grok 4.3 (Non-reasoni… is 71.8% less intelligent |
| Total AA cost (lower is better) | $2,434.12 | $250.37 | −89.7% Grok 4.3 (Non-reasoni… is 89.7% cheaper |
| End-to-end time (lower is better) | 13.72s | 5.86s | −57.3% Grok 4.3 (Non-reasoni… is 57.3% faster |
| Price per 1M tokens (in / out) | $10.0 / $50.0 | $1.25 / $2.50 | |
| Input modalities | Text, Image | Text, Image |
Grok 4.3 (Non-reasoning) vs GPT-6 Astra (Medium): 71.8% less intelligence, 89.7% less cost to run the AA benchmark, and 57.3% faster 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 (Non-reasoning) is off the frontier: at the same or lower cost, MiMo-V2.6-Pro scores 46.30 for $207.
GPT-6 Astra (Medium)Grok 4.3 (Non-reasoning)Today's Pareto frontierEvery other model
Matchup
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