Translation (Lechmazur): leaderboard
Round-trip translation quality benchmark: English to target language and back across 10 languages, scoring preservation of meaning and fluency.
Metric: Mean Score. Source: github.com. Saturation forecast: Estimated already saturated. 8 models tracked.
Top models
| # | Model | Score | Overall rank |
|---|---|---|---|
| 1 | GPT-5 (Medium) | 8.69 | #98 (GPT-5) |
| 2 | Grok 4 | 8.57 | #181 |
| 3 | Gemini 2.5 Pro | 8.53 | #152 |
| 4 | Qwen 3 Max (Preview) | 8.32 | #230 |
| 5 | Mistral Medium 3.1 | 8.29 | #408 |
| 6 | Kimi K2 0905 | 8.29 | #288 |
No result here: #3 Claude Opus 5.5, #6 GPT-6 Astra, #7 GPT-6.1 Sol.
Interactive version: theaggregate.ai/benchmark?slug=translation-lechmazur · How It Works · Data refreshed daily, snapshot 2026-10-20.