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9 undominated of 134 · Aug 28, 2026
As of Aug 28, 2026, GPT-5 Mini is dominated for Balanced on LMArena. GPT-5.6 Luna scores 55.1 higher and costs 35% less, with a covering envelope. 9 of 134 rated, priced standard models are undominated.
GPT-5.6 Luna is both better and cheaper than GPT-5 Mini.
Envelope-safe replacements
Each row scores at least as high, costs no more, and covers this model’s context, output, modalities, tools, and reasoning. A cheaper narrower model is not listed here.
| Model | LMArena | Effective $/M | You save |
|---|---|---|---|
| GPT-5.6 Luna | 1428.5 +55.1 | $0.450/M | 35% |
Higher score, lower price, named losses
Not a drop-in. The loss is why these are not a recommendation.
| Model | LMArena | Effective $/M | You give up |
|---|---|---|---|
| MiMo-V2.5-Pro | 1465.0 | $0.544/M | image, file |
| Qwen3.7 Plus | 1456.2 | $0.560/M | file |
| Gemma 4 31B | 1441.7 | $0.153/M | context, max output, file |
| Hy3 | 1441.2 | $0.144/M | context, image, file |
| MiniMax M3 | 1434.8 | $0.525/M | file |
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