Backend probe · same seed

Runware vs fal vs Vertex AI — identical seed, side by side

All three columns get the same fixed seed (2439154), the same reference image and the same prompt, 3 runs each. Each frame shows its phash fingerprint and output dimensions. 27/27 generations returned.

How to read this

Same seed on all three, same prompt and reference, 3 runs each. The phash (bottom-right of each frame) is a perceptual fingerprint — two frames with the same hash are the same image. Output dimensions differ between providers (fal auto-sizes to the reference aspect; Runware and Vertex return 1536×2752).

brazil

seed 2439154 (identical on both) · same reference + prompt

Reference input

Runware · google:4@3

run 1acbaab2edae1 · 1536×2752

run 25f6757729991 · 1536×2752

run 3dc04e7d6efe2 · 1536×2752

fal.ai · nano-banana-2/edit

run 1607ffb11336e · 912×1184

run 2607ffb11336e · 912×1184

run 3607ffb11336e · 912×1184

Google Vertex AI · gemini-3.1-flash-image

run 13a29c2a1aef0 · 1536×2752

run 27bcce9ca7376 · 1536×2752

run 38fac2acb4a94 · 1536×2752

turkiye

seed 2439154 (identical on both) · same reference + prompt

Reference input

Runware · google:4@3

run 1937194098159 · 1536×2752

run 2797943279a61 · 1536×2752

run 38018f9f1383a · 1536×2752

fal.ai · nano-banana-2/edit

run 1e3ce21b06fd7 · 799×1344

run 29031e52b3e8c · 799×1344

run 3e797b1de12b7 · 799×1344

Google Vertex AI · gemini-3.1-flash-image

run 13cebdf35f9de · 1536×2752

run 259aa81b9169c · 1536×2752

run 343e0a6749da5 · 1536×2752

germany

seed 2439154 (identical on both) · same reference + prompt

Reference input

Runware · google:4@3

run 1aba03fb1de60 · 1536×2752

run 2f9da99b14bb9 · 1536×2752

run 3ab092a4a9a88 · 1536×2752

fal.ai · nano-banana-2/edit

run 19f39ecaf0657 · 896×1200

run 29f39ecaf0657 · 896×1200

run 3b77089156211 · 896×1200

Google Vertex AI · gemini-3.1-flash-image

run 1789e8c6f789b · 1536×2752

run 209b5df0f8e52 · 1536×2752

run 36bd98745d8a0 · 1536×2752

Method: seed=2439154 identical on both; same positivePrompt + reference image; fal nano-banana-2/edit vs Vertex gemini-3.1-flash-image (aiplatform.googleapis.com, ADC). Separate from the main 5-provider comparison.