2026-09-26 (AA independent numbers on the Luna half):
AA v4.3.2 — GPT-6 Luna: level-with-predecessor intelligence at
half cost; Coding Agent Index 41 (−2 from GPT-5.6 Luna, the
family's coding regression: SWE-Atlas-QnA 44 vs 49, DeepSWE 64 vs
66); hallucination 93→77%, accuracy flat (~44%); knowledge-work
regressions (GDPval −75 Elo, AA-Briefcase −45 — shorter
deliverables omitting rubric elements); AutomationBench-AA 50→53.
Cost/task on the AA suite: Luna (max) $0.07. Head-to-head vs
Anthropic (AA release comparison): Luna (max) 37 vs Claude
Sonnet 5 (adaptive, max) 38 — a one-point statistical tie at
matched effort (Luna xhigh 34 = Sonnet xhigh 34; Luna high 32 =
Sonnet high 32) — at ~1/70th the cost per task ($0.04 vs
$2.87 at xhigh) and ~2× the output speed (145 vs 79 t/s).
Sonnet 5 leads low-effort (24 vs 21) and sector columns (legal,
healthcare); Luna leads strategy & ops. Anthropic has no
Luna-class budget model shipping — Haiku 5.5/Sonnet 5.5 remain
ledgered as pending. GLM 5.3 Flash is the
actual same-band rival.
2026-09-22 OpenAI's tier lands at Flash-class money — GPT-6 Luna
list $0.10/$0.50 undercuts GLM 5.3 Flash's $0.15/$0.50 input;
GPT-6 Sol $2/$10 sits above the Flash tier. The "50% cut" is vs
GPT-5.6 promotional pricing, not Astra. The cheap-frontier race
is now three-way: GLM Flash / DeepSeek V4.1 Flash / GPT-6 Luna.