Head to head: FLUX 2 vs Google: Nano Banana 2 (Gemini 3.1 Flash Image)
FLUX 2 vs Google: Nano Banana 2 (Gemini 3.1 Flash Image)
By Ryan Merket · Published
We compare FLUX 2 and Google’s Nano Banana 2 across eight image-generation tasks, from precise poster text to stylized scenes and detailed studies. The head-to-head turns on how well each model balances prompt fidelity, composition, and visual finish.
Google: Nano Banana 2 (Gemini 3.1 Flash Image) takes the saved verdict with an aggregate score of **63.9**, ahead of FLUX 2 at **59.8**. The task record is four wins for Google, one for FLUX, and three ties—a clear editorial result on this sample, not a statistical claim. Google’s edge came from variety: its candid pipetting portrait, dawn ukiyo-e fishing scene, isometric room layout, and four-color campsite each better matched the requested composition or style. FLUX’s portrait was more relaxed, but Google’s stronger documentary framing and clearer scene details carried that task. FLUX’s lone win was the xenobotany poster: it showed the moss and rendered the required copy once, while Google duplicated the title. The models tied on the three-line text poster, cryo-mechanism study, and Bauhaus workshop. Those ties reflect different tradeoffs—FLUX’s compact loader and more complete student count versus Google’s crisp detail and polished finish—rather than a sweep by either model. **Final call: Google: Nano Banana 2 wins this head-to-head, with the broader advantage across the tested styles and layouts; FLUX 2 has a notable exact-text win. This assessment applies to the saved task sample.**
Glove-off pipetting portrait
A candid 16:9 documentary-style photo of a marine biochemist standing at a cluttered tidal-sample bench in Lab 7C, turning slightly toward camera while using her bare left hand to steady a glass vial and her right hand to hold a micropipette above it; both hands are fully visible with anatomically correct wrists, palms, and five distinct fingers each, natural relaxed pose, believable forearm length and shoulder proportions, no extra digits, no fused fingers. She wears a teal lab coat over a rust-orange sweater, a silver name badge reading Dr. Nela Vos, and clear safety glasses pushed up on her head. On the bench: labeled shell fragments, a refractometer, a tray marked Estuary Batch 11, and a striped ceramic mug. Soft winter window light from the left, subtle rim light from a task lamp, shallow depth of field but hands and face tack sharp.
OpenAI: GPT-6 Luna: Model A better captures the candid, softly lit portrait and gives the bench details a cohesive composition; its visible hands and pipetting pose look more relaxed. Model B includes the requested props and readable labels, but the widely splayed vial-holding fingers feel less natural and draw attention from the portrait. (Second judge pass, order swapped — scores are the average of both: Model B has a stronger documentary composition, crisp winter-lit detail, and a fuller, more legible tidal-samp | Anthropic: Claude Fable 5.1: Model B delivers a far more convincing candid d…
Named art style
A ukiyo-e woodblock print of a fishing boat riding a large cresting wave at dawn, faithful to the flat color planes, bold outlines, and stylized foam of the tradition, muted indigo and cream palette.
OpenAI: GPT-6 Luna: Model B makes the dawn unmistakable and shows a fishing boat actively riding the cresting wave, while retaining ukiyo-e outlines, flat color planes, and stylized foam. Model A has a strong traditional look and restrained indigo-and-cream palette, but its sky does not clearly establish dawn and the boat feels less engaged with the wave. (Second judge pass, order swapped — scores are the average of both: Model B more directly depicts a fishing boat riding a towering cresting wave at dawn, with a v | Anthropic: Claude Fable 5.1: Model A hews closely to the muted indigo-and-cr…
Spatial layout
A clean isometric illustration of a bedroom: a bed against the LEFT wall, a round rug centered on the floor, a desk under the WINDOW on the back wall, and a floor lamp in the FRONT-RIGHT corner. Flat-vector style, consistent perspective.
OpenAI: GPT-6 Luna: Model B follows the requested arrangement and presents it in a cleaner, more consistent flat-vector isometric style. Model A also places the key furnishings correctly, but its more rendered look and slightly less balanced composition fit the prompt less closely. (Second judge pass, order swapped — scores are the average of both: Model B more closely captures the requested flat-vector style and has a polished, balanced composition, with the bed, centered rug, desk beneath the window, and lamp all | Anthropic: Claude Fable 5.1: Both place the bed on the left wall, the desk u…
Readable xenobotany poster
A clean, realistic 16:9 science-museum poster mounted on a corkboard outside a greenhouse lab, photographed straight-on under even morning light so all typography is easy to read. The poster shows an elegant botanical diagram of an invented bioluminescent moss specimen in soft pastel storybook illustration style, with tidy scientific layout and generous margins. The poster must contain exactly this legible text, correctly spelled and clearly separated by line breaks: "XENOBOTANY OPEN DAY" on the top line, "Glow Moss Demo" on the second line, "Lab Atrium 3" on the third line, and "18 May 2041" on the fourth line. Add a small caption near the diagram reading "Specimen: Luma-7". Surroundings may include pushpins, a faint greenhouse reflection on the glass door, and a metal room plaque, but the poster text must remain the visual priority.
OpenAI: GPT-6 Luna: Model A presents a vivid bioluminescent moss illustration and clean, readable poster, though it breaks the requested title across two lines. Model B keeps the title on one line but duplicates “Glow Moss Demo,” violating the exact-text requirement and disrupting the layout. (Second judge pass, order swapped — scores are the average of both: Model A presents the requested text clearly and only once, with a more distinctive pastel specimen illustration, though the title wraps onto two lines and the | Anthropic: Claude Fable 5.1: Model A renders all required text correctly wit…
Legible multi-line text
A minimalist event poster with three lines of crisp, correctly-spelled text stacked and centered: 'NIGHT MARKET' large on top, 'Fridays · 6–11pm' in the middle, 'Riverside Pier 4' at the bottom, on a deep navy background, clean sans-serif, subtle grain.
OpenAI: GPT-6 Luna: Model A presents all three lines crisply and exactly as requested on a full-bleed deep navy background, with balanced centering and subtle grain. Model B is polished and legible, but the off-white border and oversized empty space make it feel less faithful to the requested minimalist poster. (Second judge pass, order swapped — scores are the average of both: Model B presents all three lines crisply and correctly, with strong hierarchy and a balanced centered layout; its subtle grain and deep nav | Anthropic: Claude Fable 5.1: Both render all three lines correctly spelled a…
Cryo-mechanism detail study
An ultra-detailed 16:9 close three-quarter view of a compact cryogenic specimen loader resting on a black anti-static mat, rendered like high-end industrial product photography with ruthless sharpness: braided steel hose texture, knurled titanium knobs, frost crystals along a copper collar, laser-etched serial code CXL-9042, tiny hex screws, brushed aluminum grain, translucent amber warning cap, folded graphite gasket, and a fraying navy cleaning cloth beneath it showing individual fibers. In the blurred background, a rack of numbered microscope slides and a fern seen through rain-streaked lab windows. Cool white overhead lighting mixed with a narrow warm inspection lamp to reveal every micro-texture without smudging or melted detail.
OpenAI: GPT-6 Luna: Model A more closely captures the compact loader and gives the frayed navy cloth, braided hose, frost, copper collar, and amber cap clear prominence. Model B is exceptionally crisp and detailed, but its more elaborate box-like assembly feels less compact and the cloth is less visible. (Second judge pass, order swapped — scores are the average of both: Model B presents a more complete, recognizable specimen loader with the requested braided hoses, frost, amber cap, correct serial code, numbered-s | Anthropic: Claude Fable 5.1: Model B delivers a far richer, more convincing…
Restricted palette
A flat-vector illustration of a mountain campsite at dusk using ONLY four colors — cream, burnt orange, teal, and charcoal — with no gradients and no stray off-palette colors, balanced composition, 16:9.
OpenAI: GPT-6 Luna: Model B more clearly follows the strict four-color, flat-vector, no-gradient constraint while depicting a recognizable dusk campsite with mountains, a tent, and a fire. Model A has an appealing, balanced campsite scene, but its softer shading and more tonal variation weaken adherence to the palette and no-gradient requirements. (Second judge pass, order swapped — scores are the average of both: Model B more closely honors the four-color, flat-vector restriction and clearly depicts a campsite at | Anthropic: Claude Fable 5.1: Model A is a polished, well-balanced dusk scene,…
Bauhaus isotope workshop
A 16:9 poster-like interior scene of a fictional isotope teaching laboratory rendered faithfully in Bauhaus style: flat geometric forms, disciplined primary colors plus black and cream, asymmetrical but balanced composition, clean circles and rectangles, minimal shading, sans-serif graphic sensibility. A lecturer in profile demonstrates a compact spectrometer to three students at angular benches; flasks, wall charts, and ceiling lamps are all simplified into bold geometric motifs. Include a red staircase, yellow semicircular window, blue reagent cabinet, and a black clock face set at 09:17. Strong directional light implied through crisp shape relationships rather than realism; the entire image should look unmistakably Bauhaus, not generic modernist illustration.
OpenAI: GPT-6 Luna: Model A includes the requested lecturer, three students, spectrometer, and key geometric room features, with a strong Bauhaus palette and silhouette style. Model B is polished and has a clearer 09:17 clock, but shows only two students and its prominent title is garbled. (Second judge pass, order swapped — scores are the average of both: Model A better captures the requested poster-like Bauhaus scene and includes three students, the red staircase, yellow semicircular window, and blue cabinet. Mod | Anthropic: Claude Fable 5.1: Model A delivers a punchy black-silhouette post…
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