Ant Group open-sources SingProbe, a token-level safety guardrail adapted to 29 mainstream open models
Ant Group
Ant Group's inclusionAI lab released SingProbe, a lightweight token-level safety guardrail that trains small probe heads (GuardMLP or a causal-MQA attention probe) on frozen base-model hidden states to flag query risk, unsafe responses, and hallucinations per token. The framework ships with trained adapters for 29 mainstream open models on Hugging Face, including Qwen3.5/3.8, GLM-5.3, DeepSeek-V4-Flash, gpt-oss-120b, and MiniMax-M2.7.
Why it matters
Guardrails that attach to frozen models without retraining give open-model deployments a drop-in safety layer, and cross-family coverage shows a portable recipe rather than a single-vendor add-on.
Importance: 2/5
Notable open-source safety release with cross-family model coverage