Swallow - Post-trained Japanese - WMT20 Ja-En: leaderboard
Metric: BLEU. Source: swallow-llm.github.io. 68 models tracked.
Top models
| # | Model | Score |
|---|---|---|
| 1 | GPT-4o (2024-08-06) | 26.5 |
| 2 | gemma-4-26B-A4B-it (Thinking) | 26.1 |
| 3 | GPT-4.1 | 26 |
| 4 | Gemma 4 31B (IT) (Thinking) | 26 |
| 5 | Llama-3.3-Swallow-70B-Instruct-v0.4 | 25.1 |
| 6 | GPT-5.4 (Medium) | 24.9 |
| 7 | Qwen 3.5 122B A10B (Thinking) | 24.7 |
| 8 | Llama 3.3 70B Instruct | 24.6 |
| 9 | Qwen 3.5 27B (Thinking) | 24.1 |
| 10 | GPT-5 Mini (Medium) | 23.9 |
| 11 | Qwen 3.5 35B A3B (Thinking) | 23.9 |
| 12 | Gemma 3 27B (IT) | 23.8 |
| 13 | GPT-5 (Medium) | 23.6 |
| 14 | Llama 4 Scout Instruct | 23 |
| 15 | Qwen 3 235B A22B 2507 Instruct | 23 |
Interactive version: theaggregate.ai/benchmark?slug=swallow-post-trained-japanese-wmt20-ja-en · How It Works · Data refreshed daily, snapshot 2026-09-19.