GPT-5.6 Luna vs Inkling Small
Both have similar output pricing, while GPT-5.6 Luna offers a larger context window. Choose GPT-5.6 Luna or Inkling Small based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | GPT-5.6 Luna | Inkling Small |
|---|---|---|
| Provider | OpenAI | Thinking Machines |
| Input / 1M tokens | $0.20 | $0.45 |
| Output / 1M tokens | $1.20 | $1.20 |
| Context window | 1.1M | 524K |
| Parameters | — | — |
| Open weights | — | — |
| Released | — | — |
| LMArena (Chatbot Arena) Elo score | 1431 | 1412 |
| LMArena WebDev Elo score | 1518 | 1408 |
| LMArena Vision Elo score | 1258 | 1235 |
| GPQA Diamond score | 91.6 | 88.5 |
| Epoch Capabilities Index score | 156 | 150 |
FAQ
Is GPT-5.6 Luna or Inkling Small cheaper?
GPT-5.6 Luna and Inkling Small have comparable output pricing.
Which has the larger context window, GPT-5.6 Luna or Inkling Small?
GPT-5.6 Luna has the larger context window (1.1M tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.