The best AI image generators, tested and ranked

Stable Diffusion came first of seven with a perfect 5 out of 5, scoring 5 on every part. It made 24 of our 25 images usable on the first try and all 25 by the end. The blind judges gave it 5 out of 5, we found only 12 defects in 250 checks, each usable image took 7.8 minutes, and it passed all 4 rights checks. Our Stable Diffusion review has the full results.

Stable Diffusion is Stability AI's family of image models, free to download and run under a community licence. You can run it yourself, use Stability's API, which has a long list of editing and control tools, or use Brand Studio, its team platform. The catch is set-up: running it yourself needs a capable graphics card, the API usually needs a developer, and businesses over 1 million USD in yearly revenue need an Enterprise licence. It has 1.8 out of 5 on Trustpilot from just 16 reviews (checked November 2026), mostly about billing and credits spent on bad results.

Adobe Firefly came second with 4.5 out of 5. It made 23 of 25 images usable on the first try, the blind judges gave it 4.5 out of 5, and it had only 22 defects in 250 checks, the second-fewest. It passed all 4 rights checks and scored a full 5 for value. Speed was its weakest part at 4, with 11.6 minutes per usable image. Read our Adobe Firefly review.

Firefly runs on the web, on phones and inside Adobe apps such as Photoshop and Illustrator. Adobe says its own models are trained on licensed Adobe Stock and public-domain content, and it offers IP indemnification to eligible enterprise customers. It also hosts partner models from Google, OpenAI and others, whose results are your responsibility. The catch is billing: in March 2026 Adobe agreed to pay 75 million USD to settle a US case over hidden cancellation fees, while denying wrongdoing. Adobe has 1.2 out of 5 on Trustpilot from 7,571 reviews (checked November 2026).

Midjourney came third with 4.5 out of 5, scoring 4.5 on every part. It made 23 of 25 images usable on the first try, and the blind judges gave it 4.6 out of 5, second only to Stable Diffusion. Each usable image took 8.7 minutes and it passed all 4 rights checks. Its weak spot was detail: 30 defects in 250 checks, more than Firefly.

Midjourney is a paid image generator known for a distinctive, artistic look, used on its website or Discord. Plans are measured in hours of fast GPU time, and your images show in a public gallery unless you have stealth mode, which only Pro and Mega include. There's no free plan and trials are suspended. It faces copyright suits from Disney, Universal, Warner Bros. Discovery, a group of artists and EVOX Productions, and has 1.7 out of 5 on Trustpilot from 373 reviews (checked November 2026).

OpenAI GPT Image came fourth with 4.5 out of 5. It made 22 of 25 images usable on the first try and 23 by the end, took 8.5 minutes per usable image, passed all 4 rights checks and scored a full 5 for value. Output quality was its lowest part at 4: the judges gave it 4.1 out of 5, and we found 42 defects in 250 checks. Our GPT Image review covers the full test.

GPT Image is OpenAI's family of image models, which replaced DALL-E. Most people use it inside ChatGPT: describe a picture, then ask for changes in plain words. Developers can use the API, which adds transparent backgrounds and sizes up to 4K. OpenAI doesn't publish how many images the Free, Go or Plus plans allow, filters can block prompts, and we couldn't confirm its ownership terms. OpenAI's two Trustpilot profiles sit at 1.3 out of 5 (1,297 reviews) and 1.6 (3,904), while the app has 4.8 on the App Store (checked November 2026).

Hotpot.ai came fifth with 3 out of 5, scoring 3 on every part. It made 18 of 25 images usable on the first try and 20 by the end. The judges gave it 3.1 out of 5, we found 80 defects in 250 checks, each usable image took 13.2 minutes, and it passed 3 of 4 rights checks. Our Hotpot.ai review explains the results.

Hotpot.ai is more a toolbox than a single generator: text-to-image, AI headshots, photo editing, video and social templates, all on one credit balance you can buy once. Be careful with money: its terms say AI services aren't refundable, plan prices weren't shown on the pricing page, and you get a licence to results, not ownership. It has 2.1 out of 5 on Trustpilot from only 9 reviews and 4.4 on G2 (checked November 2026).

Ideogram came sixth with 3 out of 5. Like Hotpot.ai, it made 18 of 25 images usable on the first try and 20 by the end, with 3.1 out of 5 from the judges. It made fewer mistakes than Hotpot (67 defects in 250 checks) but was slower at 15.4 minutes per usable image, and passed 3 of 4 rights checks. Control and editing was its weakest part at 2.5. Read our Ideogram review.

Ideogram is built around readable text inside images, a natural fit for posters and social posts. The free plan gives 30 credits a week, but needs a Google, Apple or Microsoft sign-in and makes everything public. Paid plans keep images private and keep generating in a slow queue when credits run out. Its terms don't restrict commercial use but disclaim liability, and payments are non-refundable. It has 3.8 out of 5 on Trustpilot from 168 reviews (checked November 2026).

Leonardo.ai came last of seven with 2 out of 5. It made only 15 of 25 images usable on the first try and 18 by the end, the judges gave it 1.9 out of 5, and we found 105 defects in 250 checks, the most in the test. Each usable image took 17.7 minutes, also the slowest. It passed 3 of 4 rights checks. More in our Leonardo.ai review.

Leonardo.ai offers a choice of models, including its own Phoenix model and Flux, with upscaling, background removal and short motion clips. The free plan gives 150 tokens a day, but those images are watermarked and, per a secondary source, carry no commercial licence. Users like it far more than our results suggest: 4.7 out of 5 on Trustpilot from 1,571 reviews (checked November 2026), the best rating here, with praise for friendly support.