GPT-5.6 Luna (Max) vs Grok 4.3 (Non-reasoning)
Which is better for the money: GPT-5.6 Luna (Max) 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-5.6 Luna (Max) scores 23.3 points higher (37.3 vs 14.0) but costs 1.5× as much to run the benchmark ($320 vs $216; both mid-range class). Pick GPT-5.6 Luna (Max) when the extra intelligence is worth the premium, otherwise Grok 4.3 (Non-reasoning).
| Metric | GPT-5.6 Luna (Max) | Grok 4.3 (Non-reasoning) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 37.3 | 14.0 | −62.5% Grok 4.3 (Non-reasoni… is 62.5% less intelligent |
| Total AA cost (lower is better) | $319.93 | $215.93 | −32.5% Grok 4.3 (Non-reasoni… is 32.5% cheaper |
| End-to-end time (lower is better) | 124.29s | 5.81s | −95.3% Grok 4.3 (Non-reasoni… is 95.3% faster |
| Price per 1M tokens (in / out) | $0.20 / $1.20 | $1.25 / $2.50 | |
| Input modalities | Text, Image | Text, Image |
Grok 4.3 (Non-reasoning) vs GPT-5.6 Luna (Max): 62.5% less intelligence, 32.5% less cost to run the AA benchmark, and 95.3% faster end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-5.6 Luna (Max) is off the frontier: at the same or lower cost, MiMo-V2.6-Pro scores 46.30 for $207.
- 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-5.6 Luna (Max)Grok 4.3 (Non-reasoning)Today's Pareto frontierEvery other model
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