GPT-5.6 Luna is an OpenAI model that specialises in writing. On CrapGPT a typical chat costs 0.038¢, 8.8x cheaper than the median model, so NZ$1 buys about 2,638 chats. It ranks #14 of 25 for overall ability and scores highest at maths. OpenAI small model, polished writing.
| True cost per chat | 0.038¢ NZD |
|---|---|
| API list price | $0.19999999999999998 input / $1.2 output per 1M tokens (USD) |
| Speciality | Writing |
| Vendor | OpenAI |
| Data sources | 4 |
Scores blend every source we can match (LMArena, Epoch AI, Artificial Analysis and CrapGPT's own tests), each converted to a percentile against the current field. Updated 2026-10-11.
GPT-5.6 Luna vs Step 3.7 FlashGPT-5.6 Luna vs Grok 4.7GPT-5.6 Luna vs Ling 3.0 Flash VLGPT-5.6 Luna vs MiMo V2.5GPT-5.6 Luna vs GLM 5.3 Flash
About 0.038¢ NZD per typical chat on CrapGPT, based on measured token use. The API list price is $0.19999999999999998 per million input tokens and $1.2 per million output tokens (USD). There is no subscription.
You can try it with CrapGPT's free daily allowance after a one-tap Google sign-in.
Its strongest category is maths (score 73, #7 on CrapGPT), followed by reasoning (66). Scores blend public benchmarks and our own tests on one 0 to 100 scale.
Ling 3.1 Flash costs 0.021¢ a chat with similar overall ability (81 vs 64).