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Model: Sinestro38/qwen3-1p7b-sgd-polaris-step300-best-val
Source: Original Platform

reward_score_box_or_minerva.py

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+"""
+Reward function that tries `\boxed{}` extraction first, then Minerva-style "Answer: X".
+
+Why: verl's default math_dapo.compute_score uses Minerva regex (looks for literal
+"Answer: X" in the last 300 chars). That works for base/raw models that ramble in
+prose, but FAILS for distilled CoT models like DS-R1-Distill that emit
+`<think>...</think>\\boxed{X}` with no "Answer:" preamble. Matching both styles
+unblocks the SGD-on-DS-R1-Distill experiment without regressing the 1.7B-Base run.
+
+Selected via verl's custom_reward_function config:
+  custom_reward_function.path=/path/to/this/file.py
+  custom_reward_function.name=compute_score
+
+Returns a bare float (1.0 or -1.0) — NOT the {score, acc, pred} dict that
+math_dapo returns natively. verl's validation metric aggregator can't mean a
+field of None values (which `pred` becomes when no box is found), so the dict
+form crashes process_validation_metrics. The bare-float form sidesteps this.
+"""
+
+from verl.utils.reward_score import math_dapo
+
+
+def compute_score(data_source, solution_str, ground_truth, extra_info=None, **kwargs):
+    """Box-first, Minerva-fallback reward. Returns 1.0 (correct) or -1.0 (wrong)."""
+    boxed = math_dapo.compute_score(solution_str, ground_truth, strict_box_verify=True)
+    if boxed["score"] == 1.0:
+        return 1.0
+
+    minerva = math_dapo.compute_score(solution_str, ground_truth, strict_box_verify=False)
+    if minerva["score"] == 1.0:
+        return 1.0
+
+    return -1.0