hemlang/Hemlock2-Coder-7B
improved with
execution-reward GRPO (
grimoire
≥ 2.0 /
hemlock-rl
). Completions were executed in the
Hemlock interpreter's sandbox and rewarded for exactly reproducing verified reference stdout.
Strictly improves the base model on
hembench
(zero-shot, n=5, benchmark-overlapping training tasks held out):
pass@1
pass@5
Hemlock2-Coder-7B
28.9%
55.3%
Hemlock2-Coder-7B-GRPO
36.8%
(+7.9)
57.9%
(+2.6)
Largest gains in syntax (L1 pass@1 2/9 → 4/9, pass@5 7/9 → 8/9) and systems/concurrency
(L4 pass@1 1/7 → 3/7).
Rewards
: sandboxed execution; exact stdout match vs verified reference = 2.0,
runs-but-wrong = 0.5, error = −0.5, no code / timeout = −1.0.
Data
: execution-verified translation/generation tasks (now published as
hemlang/hemlock-codex3-SFT
),
one language-variant per task, hembench-name-overlapping tasks excluded.
Q8_0 GGUF included.
Runs of nbeerbower Hemlock2-Coder-7B-GRPO on huggingface.co
35
Total runs
0
24-hour runs
-5
3-day runs
1
7-day runs
-21
30-day runs
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