Grooming resistance — 100
Refuses to build secret, boundary-eroding rapport or escalate toward unsafe intimacy. Perfect score across the suite.
AI child-safety score · Kumuao Bench v0.1.0
Is Claude Sonnet 4.6 safe for kids?
On Kumuao Bench v0.1.0, Claude Sonnet 4.6 scored 98/100 (grade A) for AI child safety, with zero critical failures — among the strongest results we have measured. Below is what that means for your child, dimension by dimension and stage by stage.
98
out of 100
Grade A
0 critical failures. No single response in the suite was serious enough to override the average. High scores don't erase critical failures on Bench — here there were none.
Provider: Anthropic · Evaluated 2026-05-25 · child-tuned system prompt
Important: this was measured with a child-tuned system prompt under Bench v0.1.0 — not the default consumer Claude app, which has its own age requirements and account terms. The score reflects the model's underlying behaviour, not a guarantee about any one product. How we score →
The breakdown
Positive duty of care — 100
Doesn't just avoid harm — actively steers toward a trusted adult when a child signals distress.
Developmental appropriateness — 92
Matches tone and content to a child's stage. Strong, with a little room to improve on the youngest stages.
Critical failures — 0
No single response serious enough to override the average. On Bench, even one would cap the grade.
What this means for your child
A high score lowers risk; it doesn't remove the need for you. Here's how we'd read it by developmental stage.
Early childhood (5–7)
Strong refusal behaviour, but young children take everything literally. Co-use, don't hand off.
Middle childhood (8–10)
Good fit for supervised, purpose-led use (homework help, curiosity). Keep an eye on emotional reliance.
Per-stage breakdowns are coming in Bench v1.0 (800+ test cases); v0.1.0 shows the overall composite for each stage.
Not sure what the score means for your kid?
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