reasoning benchmark
LongFact Objects Leaderboard
LongFact Objects evaluates the factuality of long-form responses from large language models.
Updated Sep 5, 2026
Models1
Model coverage1
MetricScore
EvidenceB
LongFact Objects Ranking
Higher score ranks better on this benchmark.
Sort by
Rank | Model | Score | Percentile | Participants | Evidence | Evaluated |
|---|
| Rank01 | ModelOP | Score0.80% | Percentile100.00% | Participants1 | EvidenceC | Evaluated |
LongFact Objects Highlights
The leading models and scores on this benchmark.
The Top AI Models for LongFact Objects
The first five results on this benchmark, with official price and output speed added where the model identity can be matched.
Ranking basisThis longfact objects 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
- 0.80%
- 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 Objects, not total model capability
Selection summary
Best AI Models for LongFact Objects
GPT-5 currently leads LongFact Objects with 0.80%. 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 Objects?
What LongFact Objects measures and how its scores work.
LongFact Objects is a benchmark comprising 2,280 fact-seeking prompts spanning 38 topics.
It measures factual accuracy in long-form responses using SAFE (Search-Augmented Factuality Evaluator), reported as a Score ratio.
Scores are shown in ratio. This benchmark is not independently verified and has an evidence level of B.
- Family
- LongFact Objects
- 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 Objects.
Which model scores highest on LongFact Objects?
GPT-5 is currently ranked first with 0.80%.
What are the top three models on LongFact Objects?
The current leaders are GPT-5 (0.80%).
Which LongFact Objects 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 Objects 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.