Record the FLUX.2 klein Google brackets from four Gemini accounts

Three of four Google carriers clear with klein at or below 0.20, where it
matches qwen-zimage's PSNR at 0.35, beats its LPIPS, and keeps the objects
qwen-zimage redraws. The fourth is detected at 0.10 and inconclusive at 0.20,
so there is no Google operating point yet.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/chroma1-engine-research.md

@@ -673,10 +673,17 @@ the two limiting carriers, against `qwen-zimage` at 22.4-24.0 dB and
 OpenAI klein is the worse engine. It is fast, under one second per image on a
 warm H100.
 
-Google is unmeasured. At 0.10 klein kept far more of the Google carriers
-(LPIPS 0.04-0.07 against `qwen-zimage` 0.11-0.19 at 0.35, which also redraws
-objects), but the Gemini Verify AI tool returned an empty answer on the
-first upload and "a tool error or quota limit" on the second, so no Google
-verdict exists yet. Outputs, reports and oracle records:
-`.local-eval/flux2-klein-2026-09-27/`.
+Google, through Gemini on four accounts (the first returned "a tool error
+or quota limit" and later "the usage quota for checks on similar images has
+been exceeded", so the rest went to three others, each result recorded
+against its own slot): one carrier `(0.05, 0.10]`, one clean at 0.10 with
+0.05 unchecked, one `(0.10, 0.20]` ("Part of this image was edited or
+generated with Google AI" at 0.10), and one `detected` at 0.10 and
+"inconclusive" at 0.20, so its floor is above 0.20 or unsettled. At 0.20
+klein matched `qwen-zimage` at 0.35 on PSNR (17.0-20.3 against 17.6-21.0 dB)
+and beat it on LPIPS (0.079-0.152 against 0.111-0.191), and it kept the
+objects `qwen-zimage` redraws (the meatball bowl, the sign lettering). That is
+the one place klein could win, but no Google operating point exists until the
+fourth carrier settles above 0.20 and a margin is added. Outputs, reports and
+oracle records: `.local-eval/flux2-klein-2026-09-27/`.
 

docs/research-sweep-2026-09.md

@@ -61,8 +61,9 @@ This page is an index. Each finding lives in its canonical page.
   ([removal research](synthid-removal-research.md#color-restoration-after-regeneration-2026-09-27)).
   FLUX.2 klein 4B was measured the same day: stock inpainting copies the
   source through its reference tokens and keeps OpenAI SynthID, and without
-  them it clears OpenAI only at lower fidelity than `qwen-zimage`; its Google
-  verdict waits on the Gemini tool
+  them it clears OpenAI only at lower fidelity than `qwen-zimage`. On Google it
+  keeps objects `qwen-zimage` redraws, but one of four carriers is not yet
+  clean at 0.20
   ([Chroma1 research](chroma1-engine-research.md#flux2-klein-as-a-global-stage-2026-09-27)).
   Still open:
   Z-Image-Turbo as global stages (with an Apple Silicon arm through mflux),