reasoning benchmark
LongFact Concepts Leaderboard
LongFact Concepts evaluates long-form factuality in large language models using 2,280 fact-seeking prompts across 38 topics.
Updated Sep 5, 2026
Models1
Model coverage1
MetricScore
EvidenceB
LongFact Concepts Ranking
Higher score ranks better on this benchmark.
Sort by
Rank | Model | Score | Percentile | Participants | Evidence | Evaluated |
|---|
| Rank01 | ModelOP | Score0.70% | Percentile100.00% | Participants1 | EvidenceC | Evaluated |
LongFact Concepts Highlights
The leading models and scores on this benchmark.
The Top AI Models for LongFact Concepts
The first five results on this benchmark, with official price and output speed added where the model identity can be matched.
Ranking basisThis longfact concepts AI model leaderboard uses descending score in the benchmark original unit. The leaderboard ranking keeps matched price and speed data separate from benchmark evidence.
- 01OPOpenAI
- Score
- 0.70%
- Price
- $1.3 input / $10 output per 1M tokens
- Speed
- Up to 100.00 tok/s via OpenAI
Strengths
- Ranks #1 of 1 compared models
- 100th percentile on this benchmark
- C evidence result
Considerations
- This result measures LongFact Concepts, not total model capability
Selection summary
Best AI Models for LongFact Concepts
GPT-5 currently leads LongFact Concepts with 0.70%. It is the top model on this specific benchmark, while the best LLM for the broader task should also be checked against other benchmarks, price, and runtime.
Use this leaderboard with the supporting benchmark results and coverage details above. A leaderboard position summarizes the selected ranking signal; it does not replace workload-specific testing.
What is LongFact Concepts?
What LongFact Concepts measures and how its scores work.
LongFact Concepts is a benchmark for evaluating long-form factuality in large language models.
It measures the factual accuracy of long-form responses using SAFE (Search-Augmented Factuality Evaluator).
Scores are shown in ratio. This benchmark is not independently verified and has an evidence level of B.
- Family
- LongFact Concepts
- Modality
- text
- Primary category
- reasoning
- Score direction
- higher
- LLMBoard eligible
- No
- Evaluation key
- overall
LLM Stats. Benchmark scores retain their original unit. Overall score eligibility is shown separately.
FAQ
Common questions about LongFact Concepts.
Which model scores highest on LongFact Concepts?
GPT-5 is currently ranked first with 0.70%.
What are the top three models on LongFact Concepts?
The current leaders are GPT-5 (0.70%).
Which LongFact Concepts model has the lowest official input price?
GPT-5 has the lowest matched official input price at $1.3 input / $10 output per 1M tokens.
Which models are fastest among LongFact Concepts results?
The fastest matched records are GPT-5 (100.00 tok/s via OpenAI).
Does the highest score result prove overall model quality?
No. This benchmark measures one defined capability or task. The overall LLMBoard score uses a separate aggregation across eligible benchmark evidence.