GPT-5.6 Luna (Xhigh) vs Inkling Small
Which is better for the money: GPT-5.6 Luna (Xhigh) by OpenAI or Inkling Small by Thinking Machines? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-26.
Clear winner
Verdict
Pick GPT-5.6 Luna (Xhigh)
Inkling Small vs GPT-5.6 Luna (Xhigh): 25.7% less intelligence, 34.3% more cost to run the AA benchmark, and 68.3% faster end-to-end.
| Metric | GPT-5.6 Luna (Xhigh) | Inkling Small | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 34.6 | 25.7 | −25.7% Inkling Small is 25.7% less intelligent |
| Total AA cost (lower is better) | $179.33 | $240.85 | +34.3% Inkling Small is 34.3% more expensive |
| End-to-end time (lower is better) | 40.39s | 12.81s | −68.3% Inkling Small is 68.3% faster |
| Price per 1M tokens (in / out) | $0.20 / $1.20 | $0.30 / $1.20 | |
| Input modalities | Text, Image | Text, Image, Speech |
Today's Pareto frontier
Against the frontier
- GPT-5.6 Luna (Xhigh) is off the frontier: at the same or lower cost, Claude Haiku 5.5 (Xhigh) scores 41.20 for $158.
- Inkling Small is off the frontier: at the same or lower cost, MiMo-V2.6-Pro scores 46.30 for $207.
GPT-5.6 Luna (Xhigh)Inkling SmallToday's Pareto frontierOpen-weights frontierEvery other model
Matchup
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