ExploitGym
A controlled benchmark for evaluating whether AI agents can extend vulnerability-triggering inputs into working exploits.
Data verifiedBenchmark score on ExploitGym — July 9, 2026
BenchLM mirrors the published score view for ExploitGym. Claude Mythos 5 leads the public snapshot at 17.5% , followed by GPT-5.5 (13.4%) and GPT-5.4 (6.0%). BenchLM does not use these results to rank models overall.
Claude Mythos 5
Anthropic
claude-mythos-5
GPT-5.5
OpenAI
gpt-5-5
GPT-5.4
OpenAI
gpt-5-4
The published ExploitGym snapshot is tightly clustered at the top: Claude Mythos 5 sits at 17.5%, while the third row is only 11.5 points behind. The broader top-10 spread is 16.7 points, so the benchmark still separates strong models even when the leaders cluster.
4 models have been evaluated on ExploitGym. The benchmark falls in the Agentic category. This category carries a 22% weight in BenchLM.ai's overall scoring system. ExploitGym is currently displayed for reference but excluded from the scoring formula, so it does not directly affect overall rankings.
About ExploitGym
Year
2026
Tasks
898 exploitation tasks
Format
Working exploit generation
Difficulty
Advanced cybersecurity exploitation
ExploitGym contains 898 containerized tasks sourced from real-world vulnerabilities across userspace programs, V8, and the Linux kernel. BenchLM normalizes successful exploit counts to percentage of the 898-task suite and keeps the benchmark display-only because it measures dual-use offensive cybersecurity capability.
BenchLM freshness & provenance
Version
ExploitGym 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.
Benchmark score table (4 models)
FAQ
What does ExploitGym measure?
A controlled benchmark for evaluating whether AI agents can extend vulnerability-triggering inputs into working exploits.
Which model scores highest on ExploitGym?
Claude Mythos 5 by Anthropic currently leads with a score of 17.5% on ExploitGym.
How many models are evaluated on ExploitGym?
4 AI models have been evaluated on ExploitGym on BenchLM.
Compare Top Models on ExploitGym
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