Ref Hallucination Arena Skill for Claude

Reference Hallucination Arena Skill

Evaluate how accurately LLMs recommend real academic references using the

OpenJudge RefArenaPipeline:

• Load queries — from JSON/JSONL dataset
• Collect responses — BibTeX-formatted references from target models
• Extract references — parse BibTeX entries from model output
• Verify references — cross-check against Crossref / PubMed / arXiv / DBLP
• Score & rank — compute verification rate, per-field accuracy, discipline breakdown
• Generate report — Markdown report + visualization charts

Prerequisites

# Install OpenJudge
pip install py-openjudge

# Extra dependency for ref_hallucination_arena (chart generation)
pip install matplotlib

Gather from user before running

| Info | Required? | Notes |

|------|-----------|-------|

| Config YAML path | Yes | Defines endpoints, dataset, verification settings |

| Dataset path | Yes | JSON/JSONL file with queries (can be set in config) |

| API keys | Yes | Env vars: OPENAI_API_KEY, DASHSCOPE_API_KEY, etc. |

| CrossRef email | No | Improves API rate limits for verification |

| PubMed API key | No | Improves PubMed rate limits |

| Output directory | No | Default: ./evaluation_results/ref_hallucination_arena |

| Report language | No | "en" (default) or "zh" |

| Tavily API key | No | Required only if using tool-augmented mode |

Quick start

CLI

# Run evaluation with config file
python -m cookbooks.ref_hallucination_arena --config config.yaml --save

# Resume from checkpoint (default behavior)
python -m cookbooks.ref_hallucination_arena --config config.yaml --save

# Start fresh, ignore checkpoint
python -m cookbooks.ref_hallucination_arena --config config.yaml --fresh --save

# Override output directory
python -m cookbooks.ref_hallucination_arena --config config.yaml \
  --output_dir ./my_results --save

Python API

import asyncio
from cookbooks.ref_hallucination_arena.pipeline import RefArenaPipeline

async def main():
    pipeline = RefArenaPipeline.from_config("config.yaml")
    result = await pipeline.evaluate()

    for rank, (model, score) in enumerate(result.rankings, 1):
        print(f"{rank}. {model}: {score:.1%}")

asyncio.run(main())

CLI options

| Flag | Default | Description |

|------|---------|-------------|

| --config | — | Path to YAML configuration file (required) |

| --output_dir | config value | Override output directory |

| --save | False | Save results to file |

| --fresh | False | Start fresh, ignore checkpoint |

Minimal config file

task:
  description: "Evaluate LLM reference recommendation capabilities"

dataset:
  path: "./data/queries.json"

target_endpoints:
  model_a:
    base_url: "https://api.openai.com/v1"
    api_key: "${OPENAI_API_KEY}"
    model: "gpt-4"
    system_prompt: "You are an academic literature recommendation expert. Recommend {num_refs} real papers in BibTeX format. Only recommend papers you are confident actually exist."

  model_b:
    base_url: "https://dashscope.aliyuncs.com/compatible-mode/v1"
    api_key: "${DASHSCOPE_API_KEY}"
    model: "qwen3-max"
    system_prompt: "You are an academic literature recommendation expert. Recommend {num_refs} real papers in BibTeX format. Only recommend papers you are confident actually exist."

Full config reference

task

| Field | Required | Description |

|-------|----------|-------------|

| description | Yes | Evaluation task description |

| scenario | No | Usage scenario |

dataset

| Field | Default | Description |

|-------|---------|-------------|

| path | — | Path to JSON/JSONL dataset file (required) |

| shuffle | false | Shuffle queries before evaluation |

| max_queries | null | Max queries to use (null = all) |

target_endpoints.\<name\>

| Field | Default | Description |

|-------|---------|-------------|

| base_url | — | API base URL (required) |

| api_key | — | API key, supports ${ENV_VAR} (required) |

| model | — | Model name (required) |

| system_prompt | built-in | System prompt; use {num_refs} placeholder |

| max_concurrency | 5 | Max concurrent requests for this endpoint |

| extra_params | — | Extra API request params (e.g. temperature) |

| tool_config.enabled | false | Enable ReAct agent with Tavily web search |

| tool_config.tavily_api_key | env var | Tavily API key |

| tool_config.max_iterations | 10 | Max ReAct iterations (1–30) |

| tool_config.search_depth | "advanced" | "basic" or "advanced" |

verification

| Field | Default | Description |

|-------|---------|-------------|

| crossref_mailto | — | Email for Crossref polite pool |

| pubmed_api_key | — | PubMed API key |

| max_workers | 10 | Concurrent verification threads (1–50) |

| timeout | 30 | Per-request timeout in seconds |

| verified_threshold | 0.7 | Min composite score to count as VERIFIED |

evaluation

| Field | Default | Description |

|-------|---------|-------------|

| timeout | 120 | Model API request timeout in seconds |

| retry_times | 3 | Number of retry attempts |

output

| Field | Default | Description |

|-------|---------|-------------|

| output_dir | ./evaluation_results/ref_hallucination_arena | Output directory |

| save_queries | true | Save loaded queries |

| save_responses | true | Save model responses |

| save_details | true | Save verification details |

report

| Field | Default | Description |

|-------|---------|-------------|

| enabled | true | Enable report generation |

| language | "zh" | Report language: "zh" or "en" |

| include_examples | 3 | Examples per section (1–10) |

| chart.enabled | true | Generate charts |

| chart.orientation | "vertical" | "horizontal" or "vertical" |

| chart.show_values | true | Show values on bars |

| chart.highlight_best | true | Highlight best model |

Dataset format

Each query in the JSON/JSONL dataset:

{
  "query": "Please recommend papers on Transformer architectures for NLP.",
  "discipline": "computer_science",
  "num_refs": 5,
  "language": "en",
  "year_constraint": {"min_year": 2020}
}

| Field | Required | Description |

|-------|----------|-------------|

| query | Yes | Prompt for reference recommendation |

| discipline | No | computer_science, biomedical, physics, chemistry, social_science, interdisciplinary, other |

| num_refs | No | Expected number of references (default: 5) |

| language | No | "zh" or "en" (default: "zh") |

| year_constraint | No | {"exact": 2023}, {"min_year": 2020}, {"max_year": 2015}, or {"min_year": 2020, "max_year": 2024} |

Official dataset: OpenJudge/ref-hallucination-arena

Interpreting results

Overall accuracy (verification rate):

• > 75% — Excellent: model rarely hallucinates references
• 60–75% — Good: most references are real, some fabrication
• 40–60% — Fair: significant hallucination, use with caution
• < 40% — Poor: model frequently fabricates references

Per-field accuracy:

• title_accuracy — % of titles matching real papers
• author_accuracy — % of correct author lists
• year_accuracy — % of correct publication years
• doi_accuracy — % of valid DOIs

Verification status:

• VERIFIED — title + author + year all exactly match a real paper
• SUSPECT — partial match (e.g. title matches but authors differ)
• NOT_FOUND — no match in any database
• ERROR — API timeout or network failure

Ranking order: overall accuracy → year compliance rate → avg confidence → completeness

Output files

evaluation_results/ref_hallucination_arena/
├── evaluation_report.md          # Detailed Markdown report
├── evaluation_results.json       # Rankings, per-field accuracy, scores
├── verification_chart.png        # Per-field accuracy bar chart
├── discipline_chart.png          # Per-discipline accuracy chart
├── queries.json                  # Loaded evaluation queries
├── responses.json                # Raw model responses
├── extracted_refs.json           # Extracted BibTeX references
├── verification_results.json     # Per-reference verification details
└── checkpoint.json               # Pipeline checkpoint for resume

API key by model

| Model prefix | Environment variable |

|-------------|---------------------|

| gpt-*, o1-*, o3-* | OPENAI_API_KEY |

| claude-* | ANTHROPIC_API_KEY |

| qwen-*, dashscope/* | DASHSCOPE_API_KEY |

| deepseek-* | DEEPSEEK_API_KEY |

| Custom endpoint | set api_key + base_url in config |

Additional resources

• Full config examples: cookbooks/ref_hallucination_arena/examples/
• Documentation: docs/validating_graders/ref_hallucination_arena.md
• Official dataset: HuggingFace
• Leaderboard: openjudge.me/leaderboard