Firefox 147 Working Exploit Rate (Firefox 147 exploits)
We show this table for reference; we do not rank on it.
Share of patched Firefox 147 JavaScript-engine targets for which the model produced a working arbitrary-code-execution exploit.
Benchmark score on Firefox 147 exploits — November 13, 2026
We compile the Firefox 147 exploits rows from provider self-reports. Claude Mythos 5 leads the table at 88.4%. We do not use these results to rank models overall.
1 modelAgenticCurrentDisplay onlyUpdated November 13, 2026
Benchmark score table (1 model)
The one result on this page was reported by the lab that built the model.
| Rank | Model / configuration | Score | Who ran it | Parameters (B) | Open / closed |
|---|---|---|---|---|---|
| 1 | Claude Mythos 5AnthropicReported by Anthropic | 88.4% | Reported by Anthropic | Not reported | Closed |
- Lab-reported
- Benchmark-run
- Independent
About Firefox 147 exploits
Year
2026
Tasks
250 Firefox 147 vulnerability trials
Format
Working arbitrary-code-execution rate
Difficulty
Browser exploit development
Anthropic evaluates Mythos with safeguards off on patched Firefox vulnerabilities. BenchLM stores the full-success working-exploit tier, not partial register-control results.
Firefox 147 exploits is one of the cyber benchmarks we track. The cybersecurity benchmark comparison sets it beside the others, one table per security job.
Freshness and provenance
Version
Firefox 147 exploits 2026
Refresh cadence
Quarterly
Staleness state
Current
Question availability
Public benchmark set
BenchLM uses freshness metadata to decide whether a benchmark should still be treated as a strong differentiator, a benchmark to watch, or a display-only reference. For the full scoring policy, see the BenchLM methodology page.
Questions
What does Firefox 147 exploits measure?
Share of patched Firefox 147 JavaScript-engine targets for which the model produced a working arbitrary-code-execution exploit.
Which model scores highest on Firefox 147 exploits?
Claude Mythos 5 by Anthropic currently leads with a score of 88.4% on Firefox 147 exploits.
How many models are evaluated on Firefox 147 exploits?
1 AI models have published results on Firefox 147 exploits in the BenchLM catalog.
Know when it’s worth switching models
The model to choose, the cheaper alternative, and the release we would wait on.
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