What is Prompt Playground?

A workspace in Pretty Prompt where you send one prompt to multiple AI models at once and compare the outputs side by side. It works for image generation, chat completions, and other model types supported by your providers.

Do I need my own API key?

Yes. Prompt Playground runs requests through your own API keys, so you pay providers directly and stay in control of usage. Add keys once in the web app and reuse them across sessions.

Which models can I compare?

Any models your API keys unlock — image models like Gemini Flash Image, Flux, and Imagen, plus chat models from OpenAI, Anthropic, Google, and others. Add as many models as you want to a run and compare them in one screen.

Is it only for image prompts?

No. Image comparison is where side-by-side testing shines, but Playground also works for text, chat, and other prompt types. Same flow: one prompt, multiple models, one view.

How is this different from the prompt optimizer?

The optimizer restructures a prompt so a single model responds better. Playground sends the same prompt to several models so you can pick the best output or learn which model fits your use case.

Is Prompt Playground free?

Access is included with Pretty Prompt. You still pay your model providers for API usage through your own keys. See https://www.pretty-prompt.com/pricing for subscription details.

Where do my prompts go?

Requests go from Pretty Prompt to the providers you configure, using your keys. Pretty Prompt does not resell or reroute your API traffic to a shared pool.

How do I get started?

Sign in at app.pretty-prompt.com/playground, add at least one API key, pick your models, paste a prompt, and run. Results appear in parallel so you can compare without switching tabs.

Compare AI models in one prompt

Prompt Playground sends one text or image prompt to multiple models at once. Compare Gemini, Flux, Imagen, GPT, Claude and more on a single screen — with your own API keys.

4.9 stars from 130+ ratings. 40,000+ users.

Why compare models side by side?

Testing prompts model-by-model means copying the same text into ChatGPT, then Claude, then Gemini, then an image API — and trying to remember which output came from where. That friction makes it easy to stick with one default model even when another would do better.

Prompt Playground removes the tab shuffle. Write a prompt once, select the models you want, and run them in parallel. Image prompts are where this shines most: a light model like Gemini Flash Image next to heavier options like Flux 2 Pro and Imagen Ultra, all from the same input.

Open any result to compare it against the others. Add as many models as you need. It works for images, chat, text, and pretty much any prompt type your API keys support. Bring your own keys, pay providers directly, and keep control of usage.

How Prompt Playground works

Step 1

Add your API keys

Connect OpenAI, Anthropic, Google, and other providers you already use. You pay them directly.

Step 2

Pick models and paste a prompt

Choose as many models as you want — image, chat, or text — and send one prompt to all of them.

Step 3

Compare side by side

Results land in one view. Open any output to compare it against the others and pick the winner.

Prompt Playground lives in the Pretty Prompt web app, alongside your prompt library, history, and optimizer tools.

One prompt, many models

Same prompt, multiple models — compare outputs side by side without leaving the page.

Built for images, chat, and more

Playground is not limited to one modality. If your API key unlocks it, you can add it to a comparison run.

Image generation: Run the same visual prompt through Gemini Flash Image, Flux, Imagen, and more. See style, composition, and fidelity differences instantly.
Chat and completions: Compare tone, structure, and accuracy across GPT, Claude, and Gemini on support replies, drafts, and brainstorming.
Model selection: Stop guessing which model fits a task. Run a few real prompts, compare outputs, and standardize on what works.

Playground vs testing models one by one

Side-by-side comparison saves time when you are choosing models, tuning image prompts, or validating which LLM fits a workflow.

Decision point	Prompt Playground	Separate provider tabs	Custom API script
Best for	Side-by-side model comparison with one prompt	Quick one-off checks in each provider UI	Teams building internal tooling
Compare multiple models at once	Yes	No (one tab per model)	Yes (if you build it)
Works with your API keys	Yes	Per provider only	Yes
Image + text + chat in one place	Yes	Split across dashboards	Depends on your build
Setup time	Minutes (add keys, pick models)	None, but slow to compare	Days to weeks

Best for

Prompt Playground

Side-by-side model comparison with one prompt

Separate provider tabs

Quick one-off checks in each provider UI

Custom API script

Teams building internal tooling

Compare multiple models at once

Prompt Playground

Yes

Separate provider tabs

No (one tab per model)

Custom API script

Yes (if you build it)

Works with your API keys

Prompt Playground

Yes

Separate provider tabs

Per provider only

Custom API script

Yes

Image + text + chat in one place

Prompt Playground

Yes

Separate provider tabs

Split across dashboards

Custom API script

Depends on your build

Setup time

Prompt Playground

Minutes (add keys, pick models)

Separate provider tabs

None, but slow to compare

Custom API script

Days to weeks

Pair Playground with prompt improvement to structure prompts first, then compare how each model responds. See plans and limits.

Prompt Playground FAQ

40,000+ users, 4.9 stars

4.9 / 5on Chrome Web Store(130+ reviews)

Haim Moskowitz

Product & Marketing Lead•

PrettyDamnQuick

"Incredibly useful tool, makes my prompts 50x more effective, try it, you'll never go back to your "manual" prompts!"

Ophir Shay

Associate•

TLV Partners

"Super simple to onboard and surprisingly intuitive. I started using Pretty Prompt and now I can't imagine going back to manual prompting. It's become part of my daily flow and honestly worth every penny."

read the reviews

Test your next prompt across every model

Stop switching tabs. Compare outputs in one screen with your own API keys.

See plans