FLUX.2 Klein — 4B vs 9B (bf16 vs FP8) txt2img on RTX 5090
Timings & VRAM
| Variant | CFG | Steps | Load | Avg gen / prompt | Peak VRAM | Success |
|---|---|---|---|---|---|---|
| 4b-bf16 | 1.0 | 4 | 2.8s | 1.1s | 17.32 GB | 10 / 10 |
| 9b-bf16 | 1.0 | 4 | 1.5s | 5.0s | 17.68 GB | 10 / 10 |
| 9b-fp8 | 1.0 | 4 | 1.1s | 1.7s | 20.14 GB | 10 / 10 |
Same seed (42) and resolution (1024×1024) across variants. Per-variant settings — 4b-bf16: 4 steps, cfg 1.0; 9b-bf16: 4 steps, cfg 1.0; 9b-fp8: 4 steps, cfg 1.0.
prompt_00
Dog wrapped in white towel after bath, photographed with direct flash and high exposure, fur wet details sharply visible, editorial raw portrait, cinematic harsh flash lighting, intimate humorous documentary style.
Prompt sent for
Prompt sent for
prompt_01
Soaking wet tiger cub taking shelter under a banana leaf in the rainy jungle, close up photo
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Prompt sent for
prompt_02
An old faded family portrait photograph from the early 1900s showing a family of five standing stiffly in front of their modest wooden farmhouse.
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Prompt sent for
prompt_03
Ultra-wide 4MP environment concept art of a dense sci-fi megacity at night, elevated view, layered skyscrapers with holographic billboards, flying vehicles crisscrossing the sky, moody blue and magenta color palette, light fog, sharp but painterly rendering.
Prompt sent for
Prompt sent for
prompt_04
High-fidelity mockup of a mobile fitness app on a modern smartphone, showing a dashboard screen with readable labels: "Today", "Steps", "Calories", and a graph of weekly progress. Clean, flat UI design, white cards on a soft gradient background, sharp text and icons, 4MP resolution.
Prompt sent for
Prompt sent for
prompt_05
High-fashion campaign image of a model in a flowing metallic silver coat standing in a minimalist concrete room, dramatic side lighting creating long shadows, glossy reflections on the floor, cinematic 16:9 composition, cool-toned color grade, extremely detailed fabrics and skin.
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Prompt sent for
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A bohemian-style female travel blogger with sun-kissed skin and messy beach waves, sitting on a tropical beach at sunset. She’s wearing a flowy white sundress and holding up a weathered postcard with “/u/WanderlustDreamer” scrawled on it. Golden hour lighting bathes the scene in warm tones.
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Prompt sent for
prompt_07
A close-up portrait of a young woman with freckles and auburn hair, holding a vintage tarot card in front of her face. Only her curious green eyes are visible above the ornate card design. Soft, warm lighting creates a mystical atmosphere.
Prompt sent for
Prompt sent for
prompt_08
A tiny astronaut hatching from an egg on the moon.
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Prompt sent for
prompt_09
Anthropomorphic penguin in disheveled formal wear hunched on worn leather bar stool, dimly lit neighborhood bar, shot on 35mm film f/2.8, 50mm lens, practical lighting from overhead warm bar lamps and neon signs, film grain, slight desaturation, Rembrandt lighting creating dramatic face shadows, half-empty whiskey glass in sharp focus, blurred bottles background, melancholic atmosphere, rule of thirds, lonely late-night mood,
