# FACTS Grounding v2 leaderboard

external benchmark

> Every figure below is reproduced as its upstream source published it: nothing is modelled, estimated, interpolated or converted. `Unavailable` means no source published the value — it is never a zero. Each value carries its evidence state and the date it was observed.

Page: https://modelscale.dev/leaderboards/benchmarks/external-facts-grounding-v2

Every model the catalog carries a published FACTS Grounding v2 value for, ranked by that value.

## Benchmark record

| Field | Value |
| --- | --- |
| Category | external |
| Measure | Long-form document-grounded answers |
| Tasks | 1,719 document-grounded examples: 860 public and 859 held out |
| Difficulty | — |
| Published by | [FACTS Grounding v2 methodology](https://arxiv.org/abs/2512.10791) |

FACTS Grounding v2 checks whether long-form answers remain supported by supplied documents. Its revised judge ensemble and public/private results remain separate from version 1.

## FACTS Grounding v2 ranking

No model in the catalog has a published FACTS Grounding v2 score. The benchmark is defined by FACTS Grounding v2 methodology, but the catalog carries no value for it yet. An absent value is shown as absent here rather than as a zero.

Rows are ordered by the value the source published, highest first. The source does not state whether a higher value is the better result, so this document does not either: for a benchmark that measures a rate of failure, read the table from the bottom.