Independent visual review / 6 matched prompts

Best AI Image Model: 3 Models, 6 Visual Tests

Grok Imagine 2, GPT Image 2, and Nano Banana 2 face the same six prompts. Inspect every output and choose by text, realism, UI, illustration, product work, or identity editing.

Models in this review

01Grok Imagine 2.0
02GPT Image 2
03Nano Banana 2

Review method

One output per model and scenario, reviewed against the exact source prompt. Ratings describe this fixed snapshot, not the models in general.

What the matched outputs reveal

Finding the best AI image model depends on the work, not a single leaderboard score. We tested one fixed output from each model on portraits, exact typography, mobile UI, isometric illustration, product photography, and identity-preserving edits. The evidence shows different strengths: GPT leads several finish-oriented dimensions, Grok is often more literal, and Nano remains competitive while sometimes adding unrequested detail. Use this best AI image model review as a dated decision aid, then test your own production prompt before committing to a workflow. Every rating below names the visible strength or failure behind the result.

01Photoreal portraitNatural skin, believable facial anatomy, and the restrained mood of a working fisherman at dawn.GPT Image 2 edgeOpen scenario
Grok Imagine 2.01K / 1152 x 1728
GPT Image 21K / 1024 x 1536
Nano Banana 21K / 848 x 1264

Dimension review

Realism and skin

Grok Imagine 2.0Tie

Highly convincing pores, silver stubble, and jacket weathering, although the face looks slightly cleaner and more portrait-polished than the brief suggests.

GPT Image 2Win

The most lived-in result: uneven weathering, wet hair, pores, and stubble remain natural without looking over-sharpened.

Nano Banana 2Loss

The wider framing reduces visible skin detail, and the face reads more like a staged lifestyle photograph than a close 85mm portrait.

Face and anatomy

Grok Imagine 2.0Tie

Facial proportions and eyes are coherent, with no visible deformation; the crop does not provide evidence about hands.

GPT Image 2Tie

The face, ears, eyes, and beard remain anatomically credible; hands are outside the frame and cannot be judged.

Nano Banana 2Tie

The visible face and both hands are coherent, with no decisive finger or facial defect in this sample.

Prompt and mood

Grok Imagine 2.0Tie

The boat, yellow jacket, harbor bokeh, and off-camera gaze are all present, but the expression feels formal rather than tired.

GPT Image 2Win

Best captures the requested calm, tired dignity while retaining the dawn boat setting and muted teal-and-amber palette.

Nano Banana 2Loss

The fishing context is strong, but the near full-body framing and mild smile move away from the requested waist-up, restrained portrait.

View full prompt

Exact source prompt

A photorealistic waist-up portrait of a middle-aged fisherman with a weathered face, silver stubble, and deep smile lines, wearing a yellow rain jacket, standing on a fishing boat at dawn. Soft overcast light, misty sea background with blurred harbor lights, natural skin texture with pores and stubble detail, catchlights in the eyes, shot on 85mm f/1.4, shallow depth of field, muted teal-and-amber palette. He looks slightly off-camera with a calm, tired dignity.

02Typography posterRender all three required text blocks exactly while preserving a usable art-deco jazz-poster hierarchy.GPT Image 2 edgeOpen scenario
Grok Imagine 2.01K / 1152 x 1728
GPT Image 21K / 1024 x 1536
Nano Banana 21K / 848 x 1264

Dimension review

Required text accuracy

Grok Imagine 2.0Tie

Correctly spells MIDNIGHT SWING, the full date line, and the ticket footer, including punctuation and 8PM.

GPT Image 2Tie

All three requested text blocks are crisp, correctly spelled, and positioned as usable poster copy.

Nano Banana 2Tie

The title, subtitle, date, time, and ticket footer are all rendered correctly despite the extra copy elsewhere.

Instruction discipline

Grok Imagine 2.0Win

Stays within the requested copy and visual elements without inventing event details.

GPT Image 2Win

Adds illustrative city scenery but does not fabricate names, billing, or other factual event text.

Nano Banana 2Loss

Hallucinates an unrequested performer list, including fictional names and billing that would need removal before publication.

Hierarchy and style

Grok Imagine 2.0Tie

Uses a direct oversized headline, centered saxophone, deep indigo, and a clean art-deco frame with strong legibility.

GPT Image 2Win

Builds the richest print-ready hierarchy, balancing the headline, saxophone, music, frame, and city-night illustration.

Nano Banana 2Tie

The glowing vector-like saxophone and ornamental frame are cohesive, though the invented billing crowds the lower hierarchy.

View full prompt

Exact source prompt

A vertical jazz festival poster titled "MIDNIGHT SWING" in large bold cream letters, with the subtitle "LIVE JAZZ NIGHT — AUGUST 22, 8PM" and a footer line "TICKETS AT THE DOOR • ALL AGES". Deep indigo background with a large glowing brass saxophone, floating music notes, subtle grain texture, warm gold accents, art-deco frame border, crisp legible typography, print-quality poster design.

03Mobile fitness UIFollow a dense screen specification with sharp small text, correct metrics, and a coherent iOS-style layout.Mixed evidenceOpen scenario
Grok Imagine 2.01K / 1008 x 1792
GPT Image 21K / 941 x 1672
Nano Banana 21K / 768 x 1376

Dimension review

Small-text clarity

Grok Imagine 2.0Win

Labels, units, chart ticks, weekday names, and navigation text remain sharp at native size.

GPT Image 2Win

Maintains clean microcopy across stat chips, the heart-rate chart, tabs, and supporting card text.

Nano Banana 2Loss

Most copy is readable, but the extra right-side chip is clipped and the chart ends with the malformed weekday label 'San'.

Layout obedience

Grok Imagine 2.0Win

Includes PULSE, every requested metric, the weekly chart, four tabs, and the floating workout action without unrelated modules.

GPT Image 2Tie

The requested metrics and navigation are present, but PULSE is omitted and an unrequested achievement card is added.

Nano Banana 2Loss

Turns the requested screen into a hand-held phone mockup and adds a clipped fourth stat chip, weakening direct layout compliance.

UI polish

Grok Imagine 2.0Tie

Highly usable and coherent, though denser and more dashboard-like than a restrained iOS product screen.

GPT Image 2Win

Has the strongest spacing rhythm, restrained shadows, chart treatment, icon consistency, and credible iOS proportions.

Nano Banana 2Tie

The device presentation and teal system look polished, but the cropped chip and external mockup reduce production usability.

View full prompt

Exact source prompt

A mobile fitness app screen called "PULSE": top bar with greeting "Good morning, Maya" and a small avatar, a large activity ring card showing "8,432 steps" and "612 kcal", a horizontal row of stat chips "Run 5.2km", "Sleep 7h 20m", "Water 1.8L", a line chart of weekly heart rate labeled "Resting HR 58 bpm", a bottom tab bar with Home, Stats, Coach, Profile icons, and a floating teal "Start workout" button. Clean light UI, soft gray cards, rounded corners, teal accent color, realistic iOS-style layout, screen-sharp rendering.

04Isometric bookshopBalance a cute vector-diorama style with a specific cutaway space, three readers, a cafe counter, plants, and a sleeping cat.GPT Image 2 edgeOpen scenario
Grok Imagine 2.01K / 1408 x 1408
GPT Image 21K / 1254 x 1254
Nano Banana 21K / 1024 x 1024

Dimension review

Style match

Grok Imagine 2.0Tie

Crisp, warm, and highly legible, but closer to polished concept art than a gently textured vector illustration.

GPT Image 2Win

Best balances clean illustrated shapes, soft grain, terracotta and sage color, and miniature-diorama lighting.

Nano Banana 2Tie

The flattest and cutest vector treatment of the three, with clear linework and a restrained pastel palette.

Composition

Grok Imagine 2.0Tie

The cutaway is clean and readable, though the larger central floor makes the shop feel less intimate.

GPT Image 2Win

Creates the clearest corner-shop cutaway and naturally groups the counter, three readers, window, and cat.

Nano Banana 2Loss

The compact arrangement is charming, but the barista and browsing customer shift focus away from three customers reading.

Requested detail

Grok Imagine 2.0Win

Includes three active readers, two book walls, espresso equipment, hanging plants, warm lamps, and a cat asleep on books.

GPT Image 2Win

Completes every requested story detail while adding credible cafe equipment, pastries, shelves, and warm practical lighting.

Nano Banana 2Loss

Most requested objects are present, but one of the three customers browses a shelf instead of reading and a barista is added.

View full prompt

Exact source prompt

A cozy isometric illustration of a tiny corner bookshop cafe in cutaway view: bookshelves on two walls, a small espresso counter, three customers reading, a cat asleep on a stack of books, warm lamp light, plants hanging by the window, soft pastel palette with terracotta and sage accents, clean vector shapes, subtle grain, gentle shadows, cute miniature diorama style.

05Luxury product shotSpell the product name correctly and obey the material, lighting, surface, water, and single-petal constraints of a premium fragrance ad.Grok Imagine 2.0 edgeOpen scenario
Grok Imagine 2.01K / 1408 x 1408
GPT Image 21K / 1254 x 1254
Nano Banana 21K / 1024 x 1024

Dimension review

Label accuracy

Grok Imagine 2.0Tie

Renders NOIR ÉCLAT correctly, including the accented capital É, in crisp gold label typography.

GPT Image 2Tie

The two-line NOIR ÉCLAT label is correctly spelled, centered, and commercially usable.

Nano Banana 2Tie

Correctly spells NOIR ÉCLAT with the accent and keeps the supporting PARFUM PARIS copy legible.

Prompt obedience

Grok Imagine 2.0Win

Alone follows the request for a single orchid petal and includes wet marble, droplets, gold cap, and dark side lighting.

GPT Image 2Loss

Matches the bottle and environment well but replaces the requested single petal with a complete orchid flower.

Nano Banana 2Loss

Also substitutes a full orchid for one petal, despite strong compliance on the frosted bottle, wet surface, and haze.

Commercial finish

Grok Imagine 2.0Tie

Credible and sharply lit, but the bottle reads darker and less visibly frosted than requested.

GPT Image 2Win

Has the clearest frosted glass, directional haze beam, wet reflection, cap material, and balanced negative space.

Nano Banana 2Tie

Strong frosted material, haze, reflection, and centered luxury composition, with slightly softer label presentation.

View full prompt

Exact source prompt

A luxury product photograph of a frosted glass perfume bottle labeled "NOIR ÉCLAT" with a brushed gold cap, standing on wet black marble with soft reflections, a single orchid petal beside it, dramatic side lighting with a haze beam, water droplets on the glass, dark charcoal background with a subtle gradient, the label text crisp and correctly spelled, high-end commercial fragrance advertising style.

06Identity-preserving editKeep the reference subject's face, hair, outfit, and pose while moving her to a misty mountain-lake yoga deck at sunrise.Grok Imagine 2.0 edgeOpen scenario

Reference

Keep the reference subject's face, hair, outfit, and pose while moving her to a misty mountain-lake yoga deck at sunrise.

Grok Imagine 2.01K / 1728 x 1152
GPT Image 21K / 1536 x 1024
Nano Banana 21K / 1264 x 843

Dimension review

Face identity

Grok Imagine 2.0Win

Keeps the eye shape, jawline, nose, closed-mouth expression, bangs, and ponytail closest to the reference.

GPT Image 2Tie

The subject remains recognizably similar, but the facial proportions and skin rendering drift slightly more than Grok's edit.

Nano Banana 2Loss

Introduces a broad toothy smile and visible changes to the eyes and face shape, producing the largest identity shift.

Scene obedience

Grok Imagine 2.0Tie

Completes the wooden deck, mountain lake, pine forest, mist, sunrise, outfit, and original stretch pose.

GPT Image 2Tie

Faithfully replaces the park with a misty alpine lake and deck while retaining clothing, pose, and warm sunrise direction.

Nano Banana 2Tie

Also performs the full location change and retains the outfit and stretch, despite the facial-expression change.

Body continuity

Grok Imagine 2.0Tie

Limb placement, hands, socks, clothing, bracelet, and jade bangle remain coherent with the reference pose.

GPT Image 2Tie

Preserves the split stretch and accessories without a decisive hand, foot, or clothing defect.

Nano Banana 2Tie

The body and pose remain continuous and usable; no clear anatomy failure separates it from the other edits.

View full prompt

Exact source prompt

Keep the same woman from the reference photo — preserve her face, hairstyle, and identity exactly. Change the scene: she is now stretching on a wooden yoga deck overlooking a mountain lake at sunrise, wearing the same outfit, with soft golden light, mist over the water, and distant pine forests. Natural photorealistic result, consistent facial proportions, no alteration of her facial features.

Choose a model by task

There is no overall champion. These recommendations describe strengths visible in this six-prompt snapshot and may change with another prompt or model update.

TaskModel fitWhy
Exact text and instruction controlGrok Imagine 2.0 / GPT Image 2Both rendered the required poster and product text correctly without inventing factual event billing; Nano matched the required copy but added a fictional performer list.
Photoreal peopleGPT Image 2This portrait sample has the most natural weathering, skin variation, stubble, and restrained expression.
Mobile UIGrok Imagine 2.0 / GPT Image 2Choose Grok for specification obedience and GPT for the strongest visual system, spacing, and iOS polish.
Stylized illustrationGPT Image 2The bookshop output best balances miniature composition, warm atmosphere, soft grain, and requested detail.
Product photographyGPT Image 2 / Grok Imagine 2.0Choose GPT for commercial material and lighting finish, or Grok when literal object constraints such as a single petal matter most.
Identity-preserving editsGrok Imagine 2.0It preserved the reference face and quiet expression most closely while completing the requested scene replacement.

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