Code Migration v1.1
Code · 2026-10-19
Vals Code Migration v1.1 reruns the Code Migration task set with every model on the Pi agent harness (v1 used mini-SWE-agent) and grades against revised hidden behavior-test suites; Vals states the scores are not directly comparable with v1. Agents work offline with the source program and submit a target-language implementation plus a Dockerfile; an anti-cheat checker zeroes wrapped executables, copied reference artifacts, hardcoded outputs and wrong-language submissions. The CLI split migrates 30 open-source repositories into their four non-source languages (120 migrations, each scored on roughly 100 to 400 hidden tests) and the COBOL split ports 10 COBOL programs to Java. Overall is the hidden-test pass rate with every source repository weighted equally, so CLI carries three times COBOL's weight.
Top models (higher is better)
| Model | Score |
|---|---|
| Claude Sonnet 5.5 | 86.9 |
| GPT-6 Astra | 80.6 |
| GPT-6.1 Sol | 77.3 |
| Muse Wonder | 72.4 |
| Gemini 4 Argon | 70.8 |
| DeepSeek V4.1 Flash 1017 | 67.5 |
| Muse Wonder Full | 62.8 |
| DeepSeek V4.1 Flash | 58.9 |
| GLM-5.3 | 55.1 |
| Grok 4.7 | 53.2 |
| Claude Haiku 5.5 | 52.4 |
| DeepSeek V4 Pro 0813 | 52.0 |
| GLM-5.3 Flash | 51.6 |
| MiMo-V2.6-Pro | 48.8 |
| Step 5 Preview | 47.0 |
| GPT-6 Luna | 46.7 |
| Hy4 Preview | 45.4 |
| MiMo-V2.6-Flash | 39.6 |
| Mercury 3 | 39.3 |
| Gemini 3.8 Flash | 38.6 |
| Kimi K3 | 28.6 |
| Muse Spark Open | 26.9 |
| Beam 1.0 501B A23B | 22.8 |
| MiniMax M3 | 20.9 |
| Inkling-Small | 10.4 |
| Inkling | 8.8 |