kitaniai/OpenJudgment-4B-Preview

OpenJudgment 4B Preview — training dataset

The custom human-supervised typed-judgment corpus used for OpenJudgement-4B-Preview, developed by Kitani. It adapts documented 2025–2026 source releases into Noul, Choice, and Score decisions. No Mix-v3 rows or local synthetic generators were reused in this corpus.

This is an experimental training dataset, not evidence of Jev parity. Coverage is incomplete, source labels can be disputed, and the model remains unfinished. The source-specific terms below continue to apply.

The selected model checkpoint was trained for 700 optimizer steps, seeing 44,741 decisions and 49,046,168 input tokens. Those are actual training exposures; the full corpus and split sizes below describe the available data, not how much the selected model consumed.

Size and format

111,049 decisions across 64,054 normalized prompt groups. Exact Qwen3.5-4B native no-thinking prompt tokens: 120,570,589. These are corpus tokens, not training exposures. A different backbone/template requires fresh tokenization. No truncation; every prompt fits 32,768 tokens with this tokenizer.

Split	Decisions	Input tokens
train	87,621	98,928,078
validation	11,278	13,647,382
calibration	2,968	3,282,800
test	7,446	4,300,500
challenge	1,736	411,829

Types: {"score": 42750, "noul": 25594, "choice": 42705}. State, instructions, candidates and keys are model inputs. All other fields are labels/provenance and must never be included as input. Noul targets contain a scalar probability of true; Choice/Score targets align with candidates. Score keys are zero-based rubric positions. Python/API code constructs JSON from predicted distributions; the model need not generate JSON token by token.

Selected sources and adaptations

• NVIDIA HelpSteer3 (2025): actual individual human preference ratings become three-way Choice (response1/tie/response2). Human feedback's documented categorical opening becomes a five-level helpfulness Score. At least two raters required; every feedback opening must parse exactly, otherwise the whole response is excluded. Rationales never enter state. No DeepSeek-generated Principle subset is used. Duplicate response-rating tasks across pairs are deduplicated; conflicting distributions are excluded; training prompt groups capped at six judgments.
• NVIDIA Aegis 2.0 (2025, renamed Nemotron Content Safety Dataset V2): ONLY explicitly human-labeled prompt safety, converted to Noul under the source taxonomy. No response LLM-jury labels, refusal augmentation, or redacted examples. This teaches classification, not reproducing unsafe responses or generic refusal behavior.
• ClimateCheck (2025 with 2026 expansion): expert-adjudicated support/insufficient/refutation labels become evidence-based Choice. Missing evidence is not labeled as a false claim. Claim groups kept together; official test preserved. Some original claims predate this annotation release.
• UAReviews (November 2025, 2026 paper): original Ukrainian human intent labels become five-way Choice. Row-level train/test/challenge respected despite a single physical source file. Only 20% was independently gold-checked in the paper; per-row membership is unavailable. This is multilingual intent data, not English support routing.
• CoVal (2025 with subsequent update): human societal-preference rankings become four-way Choice using empirical top-choice votes; ties divide that annotator's vote equally. No demographics or rationales are inputs. These are subjective preferences, not factual ground truth.

Recent source publication does not mean every underlying prompt or generated candidate response was newly written. Source labels are human-supervised; many candidate responses being judged were generated by models. Source revisions, dates, attribution, licenses and hashes are in source_manifest.json.

Verification and limitations

Independent audit reconstructs every emitted target and model-visible state against pinned originals, checks IDs and split isolation, and verifies no official evaluation row entered training. Exact duplicate decisions removed; conflicting decisions excluded. Connected normalized state/prompt groups reserve official holdouts before new 90/5/3/2 train/validation/calibration/test allocation. Challenge remains evaluation-only. Source test is combined with newly reserved development test rows; source_split retains origin.

This proves faithful conversion, not that human labels are infallible. Human disagreements are retained as empirical frequencies, not invented calibrated confidence. Unknown model pretraining exposure and semantic near-duplicates cannot be ruled out. Publish per-source/per-type metrics; do not use only aggregate accuracy. Evaluation audits inspect annotation integrity, not model predictions. The associated model was selected using validation data and calibrated on the calibration split. Model evaluation records are included in the model repository; the test and challenge splits are for evaluation, not training.

Coverage remains incomplete for English ticket routing, résumé seniority, bespoke business rules, and task-specific natural rubrics. The corpus is deliberately not padded with weak recent reuploads or repetitive synthetic examples. These gaps must be evaluated before full training. The dataset is not for teaching Doom gameplay or general code generation.

Rights

Original source terms and attribution remain in force: CC BY 4.0 for HelpSteer3, Aegis, UAReviews and CoVal; MIT for ClimateCheck. Retain source-specific notices and the CoVal source terms on reuse/anonymity. Adaptations described above; no blanket relicensing of source material. Source content can contain disturbing material for moderation assessment.

Reproduction

Code is in code/. Fetch pins are fixed; scripts only fetch/adapt/audit/count/publish data. v4_build.py writes normalized records; v4_audit.py verifies original labels; v4_token_stats.py counts exact native prompt tokens without loading model weights. Dependencies and pinned versions used: Python 3.12, pyarrow, huggingface_hub, transformers 5.17.0 for token counting. The code preserves the original build workflow; references to private staging repositories or pre-training authorization markers are historical. Training code and model-selection records are available in the model repository.