GPT-5.6 Luna (xHigh)
OpenAIProprietary
GPT-5.6 Luna (xHigh) is a vision-language model from OpenAI. It ranks 58 of 167 on LMArena’s overall vision board with 1257±7 from 11,055 votes. Its best category is Diagrams (#57 of 123). License: Proprietary.
Key figures
- Developer
- OpenAI
- License
- Proprietary
- First seen (our snapshots)
- 2026-10-26
No data: Captioning, Entity recognition.
Who it suits
- Overall #58 of 167: upper half.
- Strongest category: Diagrams (#57 of 123).
- Proprietary; used through OpenAI’s apps or API.
Neighbours on the overall board
| # | Model | Score | Votes | License | Δ vs this model |
|---|---|---|---|---|---|
| 55 |  Grok 4.20 Beta (Reasoning, 0309) xAI | 1262 | 26,796 | Proprietary | +5 |
| 56 |  Gemma 4 26B A4B Google | 1260 | 23,922 | Apache 2.0 | +3 |
| 57 | Grok 4.20 Multi-Agent Beta (0309) xAI | 1259 | 24,532 | Proprietary | +2 |
| 58 | GPT-5.6 Luna (xHigh) OpenAI | 1257 | 11,055 | Proprietary | |
| 59 |  MiMo-V2.6-Flash Xiaomi | 1256 | 3,618 | MIT | -1 |
| 60 |  Kimi K2.5 (Instant) Moonshot AI | 1254 | 4,111 | Modified MIT | -3 |
| 61 | Gemini 2.5 Flash Preview (09-2025) Google | 1254 | 4,792 | Proprietary | -3 |
Alternatives · More from OpenAI
| # | Model | Score | Votes | License |
|---|---|---|---|---|
| 18 | GPT-5.4 (High) OpenAI | 1303 | 30,747 | Proprietary |
| 21 | GPT-5.5 OpenAI | 1297 | 28,781 | Proprietary |
| 25 | GPT-5.5 (High) OpenAI | 1293 | 27,067 | Proprietary |
| 27 | GPT-5.4 OpenAI | 1292 | 22,804 | Proprietary |
| 29 | GPT-6.1 Sol (Max) OpenAI | 1288 | 2,330 | Proprietary |
Alternatives · Top open-weight models
| # | Model | Score | Votes | License |
|---|---|---|---|---|
| 24 |  GLM-5.3-Flash Z.ai | 1294 | 16,254 | MIT |
| 34 | Kimi K2.6 Moonshot AI | 1282 | 16,368 | Modified MIT |
| 38 |  DeepSeek-V4.1-Flash-20260910 (Max) DeepSeek | 1278 | 4,100 | MIT |
| 39 | Gemma 4 31B Google | 1276 | 40,219 | Apache 2.0 |
| 44 |  Qwen3.8-27B Alibaba | 1269 | 7,614 | Apache 2.0 |
How to read these scores
- If two scores differ by less than their ± intervals, the models are statistically close.
- Each category board is computed independently; do not compare scores across categories.
- Models with few votes move more; ranks of new entries may change.
FAQ
Where does GPT-5.6 Luna (xHigh) rank among vision models?
Overall rank 58 (1257); OCR rank 58 (1264); Diagrams rank 57 (1273); Homework rank 55 (1282); Creative writing rank 49 (1257); Humor rank 79 (1190); English rank 57 (1263); Chinese rank 55 (1294) (LMArena, data as of Oct 26, 2026).
How good is GPT-5.6 Luna (xHigh) at OCR?
GPT-5.6 Luna (xHigh) ranks 58 of 123 on LMArena’s OCR board with 1264 (7,472 votes).
Is GPT-5.6 Luna (xHigh) better with Chinese or English prompts?
Chinese board: #55 of 128 (1294); English board: #57 of 167 (1263). The boards are computed separately, so compare ranks rather than scores.
Is GPT-5.6 Luna (xHigh) open-weight?
No. LMArena lists it as Proprietary; it is available through OpenAI’s apps or API.
How far is GPT-5.6 Luna (xHigh) from #1?
#1 overall is Claude Fable 5 (High) (1325); GPT-5.6 Luna (xHigh) has 1257, 68 points behind.
Sources
LMArena data published Oct 19, 2026.
Synced here Oct 26, 2026.
Price, context length and release date have no reliable public data here and are not shown; all figures come from snapshots, blanks are –.