GPT-6 Luna (Medium) vs Grok 4.3 (Non-reasoning)
Which is better for the money: GPT-6 Luna (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 2026-10-24.
Clear winner
Verdict
Pick GPT-6 Luna (Medium)
Grok 4.3 (Non-reasoning) vs GPT-6 Luna (Medium): 53.2% less intelligence, 703.2% more cost to run the AA benchmark, and 28.6% faster end-to-end.
| Metric | GPT-6 Luna (Medium) | Grok 4.3 (Non-reasoning) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 29.9 | 14.0 | −53.2% Grok 4.3 (Non-reasoni… is 53.2% less intelligent |
| Total AA cost (lower is better) | $31.17 | $250.37 | +703.2% Grok 4.3 (Non-reasoni… is 8.0× more expensive |
| End-to-end time (lower is better) | 8.25s | 5.89s | −28.6% Grok 4.3 (Non-reasoni… is 28.6% faster |
| Price per 1M tokens (in / out) | $0.10 / $0.50 | $1.25 / $2.50 | |
| Input modalities | Text, Image | Text, Image |
Today's Pareto frontier
Against the frontier
- GPT-6 Luna (Medium) is on today's frontier: nothing is both smarter and cheaper.
- 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 Luna (Medium)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-6-luna-medium/grok-4-3-non-reasoning · Markdown: /api/v1/compare/gpt-6-luna-medium/grok-4-3-non-reasoning?format=md · llms.txt · agent skill