Custom Comparison
Compare 2 AI Models
GPT 5.6 Terra vs GPT 5.6 Luna
GPT 5.6 TerraOpenAI
GPT 5.6 LunaOpenAI
Up to 3 models. Every selection is in the address bar, so the comparison is a link you can send.
Interactive Comparison
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$2.5 / $15 per 1M tokens | $1 / $6 per 1M tokens | |
|---|---|---|
| Identity | ||
| Developer | OpenAI | OpenAI |
| Licence | Proprietary | Proprietary |
| Self-hostable | No | No |
| Cost | ||
| Blended $/1M tokensinput × 0.75 + output × 0.25 | $5.625 / 1M tokens | $2.250 / 1M tokens |
| Input price | $2.500 / 1M tokens | $1.000 / 1M tokens |
| Output price | $15.000 / 1M tokens | $6.000 / 1M tokens |
| Measured quality | ||
| LMArena Elo | 1465 (checked Oct 2026) | 1453 (checked Oct 2026) |
| LMArena rank | Rank 51 | Rank 75 |
| Elo per dollarLMArena Elo ÷ blended $/1M tokens | 260 | 646 |
