external benchmark
Anthropic OSS-Fuzz write primitive leaderboard
Anthropic OSS-Fuzz Write-Primitive-or-Higher Rate. Every model the catalog carries a published Anthropic OSS-Fuzz write primitive value for, ranked by that value.
Share of evaluated OSS-Fuzz entry points where the model achieved a write primitive or stronger result.
Anthropic OSS-Fuzz write primitive ranking
1 model with a published Anthropic OSS-Fuzz write primitive value, ordered by that value, highest first. Models the source has not scored on this benchmark are not listed — they are unmeasured, not last.
| Rank | Model | Provider | Write-primitive-or-higher rate |
|---|---|---|---|
| 1 |  Claude Mythos 5 | Anthropic | 32.4 |
Evidence key: Observed
Rows are ordered by the value Claude Fable 5 and Claude Mythos 5 published, highest first. The source does not state whether a higher value is the better result, so this page does not either: for a benchmark that measures a rate of failure, read the table from the bottom.