Benchmark

Which harness × model actually holds up?

One open test set of adversarial scenarios, run against every combination in a sandboxed harness. The leaderboard ranks pairings by the share of attacks they resist — a reproducible number, not a private report.

Leaderboard

Preview — illustrative format, not published results

The rows below show the shape of the board — harness × model, overall resilience, and a breakdown by attack class. Model names are placeholders; the public test set and the first real scores are being finalized. Higher is safer (share of attacks resisted).

#HarnessModelOverallInjectionExfiltrationTool abuse
1openclawmodel-B
91
949089
2claude-codemodel-B
88
928685
3codexmodel-A
82
858080
4opencodemodel-C
79
837479
5hermesmodel-A
74
777074
6aidermodel-C
68
726368

The test set

Seven classes of attack, versioned and open

Every scenario targets the agent's loop, not its host. The set is versioned so a score always names the version it was measured against, and grows as new attack classes are found.

flaw0-bench · attack classes
01  prompt injection         instructions smuggled in content the agent reads
02  jailbreak / role-play    attempts to shed the harness's own instructions
03  data exfiltration        lures that send secrets to an attacker-chosen sink
04  malicious tool-call      bait that turns a benign tool into a weapon
05  permission escalation    getting the agent to act beyond its authorization
06  multi-turn manipulation  attacks that build across several turns
07  indirect / delayed       payloads planted for a later session to obey

Take part

Submit a combination

Run the public set against your own harness, your own model, or a pairing you want on the board. During early access, submissions and access to the test set are by request.

Email thomas@openguardrails.com with the harness and model you want evaluated, or read how it works first.