Best image model · Social media posts
The best AI image generator for social media posts: 7 models, tested
All 7 image models in llmwise on the same 2 social media prompts: every image as it was made, what the checks found in it, and what an image of each costs.
Based on 14 images made on September 29, 2026 through kie.ai with llmwise's own settings for each model, each checked by Claude Sonnet 5.5. How the images are checked.
Short answer
On our 2 social media prompts, run on all 7 image models in llmwise and checked the same way, Nano Banana Pro came first, passing 2 of 2 with 12 of 12 checks right. 1 of 7 passed every prompt; each image is below, with what the checks found.
Every image model on social media posts, ranked
Ranked by prompts passed, then by checks right (each question answered yes, each piece of writing read back), then by what an image counts as in llmwise.
| Model | Passed | Checks right | An image counts as | Time an image |
|---|---|---|---|---|
| Nano Banana Pro | 2 of 2 | 12 of 12 | 5 Claude Haiku 4.5 messages | 42.2 s |
| Qwen-Image 2.1 | 1 of 2 | 11 of 12 | 1 Claude Haiku 4.5 message | 57.4 s |
| FLUX.2 Pro | 1 of 2 | 11 of 12 | 2 Claude Haiku 4.5 messages | 175.3 s |
| Seedream 5.0 Lite | 1 of 2 | 11 of 12 | 2 Claude Haiku 4.5 messages | 42.3 s |
| Ideogram 3.0 | 1 of 2 | 11 of 12 | 2 Claude Haiku 4.5 messages | 63.6 s |
| GPT Image 2.5 Flare | 1 of 2 | 10 of 12 | 2 Claude Haiku 4.5 messages | 65.7 s |
| Nano Banana 2 | 1 of 2 | 10 of 12 | 2 Claude Haiku 4.5 messages | 70.8 s |
A summer sale post
Every model's image for this everyday square prompt, and what the checks found.
A square Instagram post for a summer sale: a flat lay of a striped beach towel and a pair of sunglasses on sand, with the words "SUMMER SALE" and "30% OFF" in clean white letters.
The writing it must carry, read back exactly (case and punctuation aside): “SUMMER SALE” and “30% OFF”.
The questions, each answered yes or no from the image alone:
- Is it seen from above, as a flat lay?
- Is there a striped towel?
- Is there a pair of sunglasses?
- Is the writing in white letters?
Read in it: “SUMMER”, “SALE”, “30% OFF”.
- Yes: The camera looks straight down at the towel, sunglasses and sand, so it reads as a flat lay.
- Yes: A blue and white striped towel covers the left side of the image.
- Yes: Tortoiseshell sunglasses with dark lenses lie on the towel.
- Yes: All the text (SUMMER, SALE, 30% OFF) is white.
$0.030 at kie.ai, 58.5 s, 1254 × 1254.
Read in it: “SUMMER”, “SALE”, “30% OFF”.
- Yes: The camera looks straight down on the sand, towel and sunglasses, giving a flat-lay view.
- Yes: A blue, white and yellow striped towel with fringe lies on the sand.
- Yes: A pair of tortoiseshell round sunglasses with dark lenses rests on the sand.
- Yes: The words SUMMER SALE 30% OFF are in white letters.
$0.040 at kie.ai, 56.0 s, 1024 × 1024.
Read in it: “SUMMER SALE”, “30% OFF”.
- Yes: The camera looks straight down on the towel, sunglasses, sand and shells arranged flat on the ground.
- Yes: A navy and white striped towel covers the left side of the image.
- Yes: A pair of tortoiseshell sunglasses with brown lenses sits on the towel edge and sand.
- Yes: Both "SUMMER SALE" and "30% OFF" are in white letters.
$0.090 at kie.ai, 43.5 s, 2048 × 2048.
Read in it: “SUMMER SALE”, “30% OFF”.
- Yes: The towel and sunglasses are photographed from directly above, lying flat on the sand.
- Yes: The towel has alternating blue and white horizontal stripes.
- Yes: Black aviator-style sunglasses rest on the towel.
- Yes: Both 'SUMMER SALE' and '30% OFF' are in white letters.
$0.028 at kie.ai, 45.9 s, 2048 × 2048.
Read in it: “SUMMER SALE”, “30% OFF”.
- Yes: The camera looks straight down on the towel and sunglasses lying flat on the sand.
- Yes: The towel has horizontal teal, coral and white stripes.
- Yes: A pair of tortoiseshell sunglasses lies on the towel.
- Yes: Both lines of text, 'SUMMER SALE' and '30% OFF', are white.
$0.025 at kie.ai, 174.4 s, 1024 × 1024.
Read in it: “SUMMER SALE”, “30% OFF”.
- Yes: The towel and sunglasses lie on flat sand and are photographed from directly above.
- Yes: A navy and white striped towel is draped on the sand at left.
- Yes: Aviator-style sunglasses with dark lenses and metal frames lie on the sand.
- Yes: Both 'SUMMER SALE' and '30% OFF' are in white letters.
$0.035 at kie.ai, 63.7 s, 1024 × 1024.
Read in it: “SUMMER SALE”, “30% OFF”.
- Yes: The towel and sunglasses are shown from directly above, lying flat on the sand.
- Yes: The towel has blue and white vertical stripes.
- Yes: A pair of black sunglasses with dark lenses sits on the towel.
- Yes: Both 'SUMMER SALE' and '30% OFF' are in white letters.
$0.020 at kie.ai, 23.1 s, 1024 × 1024.
A book club announcement, top and bottom
Every model's image for this hard portrait prompt, and what the checks found.
A portrait social media post announcing a book club: an open book and a cup of tea on a wooden table. The words "BOOK CLUB" at the top and "THURSDAY 7PM" at the bottom, and nothing else written.
The writing it must carry, read back exactly (case and punctuation aside): “BOOK CLUB” and “THURSDAY 7PM”.
The questions, each answered yes or no from the image alone:
- Is there an open book?
- Is there a cup of tea?
- Is there one line of writing at the top and one at the bottom?
- Apart from those two lines, is nothing else written?
Failed: questions 3 and 4 answered no.
Read in it: “BOOK”, “CLUB”, “THURSDAY 7PM”.
- Yes: An open book with pages showing lies on the wooden table.
- Yes: A blue-and-white patterned teacup on a saucer holds amber tea.
- No: The top has two lines of writing (BOOK and CLUB), not one, plus THURSDAY 7PM at the bottom.
- No: Besides the top and bottom text, the open book's pages have small print, though it is unreadable.
$0.030 at kie.ai, 72.9 s, 1024 × 1536.
Failed: questions 3 and 4 answered no.
Read in it: “BOOK”, “CLUB”, “THURSDAY 7PM”.
- Yes: An open book with pages showing lies on the wooden table.
- Yes: A cup of steaming tea sits on a saucer on the table.
- No: The top has two lines, 'BOOK' and 'CLUB', not one, and the bottom has one line, 'THURSDAY 7PM'.
- No: The book pages have tiny text and the tea bag tag has small writing, so there is more writing than the headline and the bottom line.
$0.040 at kie.ai, 85.5 s, 848 × 1264.
Read in it: “BOOK CLUB”, “THURSDAY 7PM”.
- Yes: An open book with fanned pages lies on the wooden table.
- Yes: A ceramic mug holds a steaming dark liquid with a spoon in it, which looks like tea.
- Yes: "BOOK CLUB" is at the top and "THURSDAY 7PM" is at the bottom, one line each.
- Yes: No other writing is visible; the book pages show no legible text.
$0.090 at kie.ai, 40.8 s, 1696 × 2528.
Failed: question 4 answered no.
Read in it: “BOOK CLUB”, “THURSDAY 7PM”.
- Yes: An open book with pages fanned out lies on the wooden table.
- Yes: A cup on a saucer holds a brown steaming liquid that looks like tea.
- Yes: "BOOK CLUB" is at the top and "THURSDAY 7PM" is at the bottom.
- No: The book's pages show tiny, unreadable text-like marks, so the image contains more than those two lines.
$0.028 at kie.ai, 38.8 s, 1664 × 2496.
Failed: question 4 answered no.
Read in it: “BOOK CLUB”, “THURSDAY 7PM”.
- Yes: An open book lies on the wooden table in the center of the image.
- Yes: A cup of steaming amber tea sits at the right of the book.
- Yes: "BOOK CLUB" is at the top and "THURSDAY 7PM" is at the bottom.
- No: The book's pages contain small lines of text and page numbers, so other writing appears in the image, though it is illegible.
$0.025 at kie.ai, 176.2 s, 688 × 1024.
Failed: question 1 answered no.
Read in it: “BOOK CLUB”, “THURSDAY 7PM”.
- No: The book is standing upright with its page edges facing the viewer, so it is closed, not open.
- Yes: A white cup holds an amber-colored liquid that looks like tea.
- Yes: "BOOK CLUB" is at the top and "THURSDAY 7PM" is at the bottom, one line each.
- Yes: No other writing is visible on the book, cup, or table.
$0.035 at kie.ai, 63.5 s, 864 × 1152.
Failed: question 4 answered no.
Read in it: “BOOK CLUB”, “THURSDAY 7PM”.
- Yes: An open book with pages showing lies on the wooden table.
- Yes: A ceramic cup on a saucer holds a dark tea-like liquid.
- Yes: "BOOK CLUB" is at the top and "THURSDAY 7PM" is at the bottom, one line each.
- No: The open book's pages show small blurry lines of text, so there is other writing, though it is unreadable.
$0.020 at kie.ai, 91.7 s, 832 × 1248.
More image tests
Questions
What's the best AI image generator for social media posts?
On our 2 social media prompts, run on all 7 image models in llmwise and checked the same way, Nano Banana Pro came first, passing 2 of 2 with 12 of 12 checks right. 1 of 7 passed every prompt; each image is below, with what the checks found.
How are the images checked?
Every image is checked the same way by Claude Sonnet 5.5, whose maker has no image model here: it first writes out all the writing it can read, without being told what should be there, then answers each question yes or no from the image. An image passes when all its writing is there and every answer is yes. Nothing else is judged.
Claude, GPT, Gemini, DeepSeek, Grok, Kimi, and GLM, in one chat.
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