← LLM 
OpenAI
gpt-4.1-mini
Measured 2026-08-25
* Conditional
Fabricates on 57% of out-of-policy questions — the worst rate on the board bar qwen-turbo. TTFT measured 2026-07-27.
Score
70
Task done
87.19%
78–95% 95% CI bootstrap over items · n=95 · measured 2026-08-25
Refusal quality
83.3%
names the gap 80% · offers a route 80% · 10 probes x 3 iterations · 3 silent turns scored zero
Fabrication
57%
17 of 30 probe runs
Dead-air
40.0%
102 of 255 turns
Tool silence
65.8%
102 of 155 tool-call turns
Stalled
16.7%
15 of 90 runs
TTFT p50
708ms
708–1094 p50–p90
Cost / 1M tok
$1.60
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