While just a couple of years ago AI image generators used to produce obviously fake, sometimes horror-inducing results (remember AI-generated hands?), they’re now very capable tools, for both personal and professional use.
We asked Andrew Dyuzhov, SEO at Overchat AI, an all-in-one AI app that features multiple image generators, about the best ones to use and what makes them stand out.
The Best AI Image Generators
Here are the 4 models that consistently deliver the best results in 2025:
- Gpt-image-1 — for filters and AI characters
- Stable Diffusion — an open source variant
- Flux.1 — for editing images
- Recraft — for photorealistic results
Where to Access the Best AI Image Generators
While each of these tools have dedicated websites, if you want to try them all, purchasing 3+ different subscriptions can be expensive. Alternatively, you can try all of them on overchat.ai — an all-in-one AI app where you can switch between different AI models on the fly.
How do AI Image Generators Work?
Fundamentally all of these tools work the same, but there are two major types of AI image generators:
- Text-to-image generates take a prompt as an input. Basically, you type what you want to see and the AI creates that.
- Image-to-image generators take an input image and some kind of instruction. Then, they either modify the image according to the instruction or generate a new one with the uploaded picture as reference.
“Image-to-image generators are the most popular right now, they are powering AI characters and viral AI filters. Not all AI models can do image-to-image generation,” Andrew says.
For example, stable diffusion is a text-to-image generator, but GPT-image-1 can do both. On a technical level, both text-to-image and image-to-image generators use a process called diffusion.
“When the generator starts it creates a picture that looks like random noise, and with each iteration it rearranges the pixels until you get something that makes sense. The image essentially goes through a journey from random TV noise to a Jackson Pollock painting to a 4k photo,” Andrew explains.
What Makes the Best AI Image Generator?
When choosing the image generator there are two things that are most important:
- Prompt-following
- Overall fidelity
Prompt following refers to the ability to follow your instructions. For example, if you ask to generate an AI character wearing glasses with a square frame, amid a thousand other things, the AI should generate a square frame — not a round or heart-shaped one. Good prompt following makes it easier to use a model.
Overall fidelity is the ability of an AI model to recreate a particular style well.
“Most AI image generators output technically usable images, such as 1024×1024, so when we’re talking about fidelity we don’t usually mean that a model can’t output high-enough resolution. Instead, we’re talking about its ability to create a style faithfully and not make it weird.”
The best AI Image Generators in 2025
WIth that out of the way, let’s talk about the best AI image generator models you can use in 2025 (in no particular order):
GPT-image-1 — For Filters and AI Characters
Type: Text-to-image and image-to-image
GPT-image-1 is OpenAI’s latest model, and it’s the one behind most viral AI filters you see on social media, such as the ever-popular Ghibli Filter. Upload a photo and it can transform you into an anime character, age you up or down, or apply any style you can imagine. GPT-image-1 can recreate an image very well when applying filters, but note that it still regenerates the whole thing, so some likeness will be lost in the process. The only drawback is its speed. It takes about 30 seconds per image. Other models work in 5-10 seconds.
Stable Diffusion — The Open Source Option
Type: Text-to-image
Stable Diffusion is the only major model you can download and run on your own computer. This means total privacy — your images never leave your machine. You can also customize it in many ways, with hundreds of versions made by the community. The catch is that you need technical knowledge to run it locally, or you can use it through platforms like Overchat AI without the hassle.
Flux.1 — For Editing Images
Type: Text-to-image and image-to-image
Flux.1 can remove objects, change backgrounds, or modify specific elements while keeping everything else the same. While this might feel similar to using filters with GPT-image-1, Flux.1 doesn’t regenerate the entire image. This allows you to, for example, reposition a person in a photograph without altering their appearance.
Recraft — For Photorealistic Results
Type: Text-to-image
Recraft is very good at creating photorealistic results by default. When you need images that look like actual photographs, choose this model. GPT-image-1 can also achieve similar results, but it requires more advanced prompt engineering to get there.
Bottom Line
You can try all four of these models on Overchat AI for $4.99 per week, which is cheaper than subscribing to each one separately. You can also access them individually — GPT-image-1 through ChatGPT Plus ($20/month), Stable Diffusion and Flux.1 through various platforms (the price varies), and Recraft through its own website ($12/month)
