GPT-5.6 Luna (High) vs Grok 4.3 (Non-reasoning)
Which is better for the money: GPT-5.6 Luna (High) 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 2026-10-27.
Clear winner
Verdict
Pick GPT-5.6 Luna (High)
Grok 4.3 (Non-reasoning) vs GPT-5.6 Luna (High): 56.4% less intelligence, 99.7% more cost to run the AA benchmark, and 63.9% faster end-to-end.
| Metric | GPT-5.6 Luna (High) | Grok 4.3 (Non-reasoning) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 32.1 | 14.0 | −56.4% Grok 4.3 (Non-reasoni… is 56.4% less intelligent |
| Total AA cost (lower is better) | $108.15 | $215.93 | +99.7% Grok 4.3 (Non-reasoni… is 99.7% more expensive |
| End-to-end time (lower is better) | 16.30s | 5.89s | −63.9% Grok 4.3 (Non-reasoni… is 63.9% faster |
| Price per 1M tokens (in / out) | $0.20 / $1.20 | $1.25 / $2.50 | |
| Input modalities | Text, Image | Text, Image |
Today's Pareto frontier
Against the frontier
- GPT-5.6 Luna (High) is off the frontier: at the same or lower cost, Claude Haiku 5.5 (High) scores 37.80 for $94.1.
- 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 (High)Grok 4.3 (Non-reasoning)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-5-6-luna-high/grok-4-3-non-reasoning · Markdown: /api/v1/compare/gpt-5-6-luna-high/grok-4-3-non-reasoning?format=md · llms.txt · agent skill