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OpenAI

gpt-5.6-terra

reasoning off (gateway default)

* Conditional

Measured 2026-08-05 with reasoning off, in the same run as luna.

Score

71

Task done

87.37%

74–98% 95% CI bootstrap over items · n=95 · measured 2026-08-25

Refusal quality

88.9%

names the gap 90% · offers a route 87% · 10 probes x 3 iterations · 1 silent turn scored zero

Fabrication

0%

0 of 10 probes (30 probe runs) · ≤31%

Dead-air

66.3%

195 of 294 turns

Tool silence

100.0%

all of 19 items (195 tool-call turns) · ≥82%

Stalled

17.8%

16 of 90 runs

TTFT p50

701ms

701–797 p50–p90

Cost / 1M tok

$12.00

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