Most "free" AI image generators hand you a block of trial credits once and then stop. This one refills. The free plan on OpenModels carries a wallet of green credits that tops itself back up every hour toward a daily cap, and that wallet pays for the models running on our own GPUs. Here is exactly what it covers, and exactly where it runs out.
There are two wallets on an OpenModels account and they are not interchangeable. Green credits (⚡) refill on a clock and can only pay for models that run on hardware we own. Gold credits (✦) are bought with money and pay for everything, including the hosted models from Google, ByteDance, OpenAI and the rest. Signing up grants zero gold.
That split is the whole reason a free tier exists at all. A generation on our own GPU costs us electricity on a machine already paid for, so it can be generous. A generation on a hosted API costs real dollars per call, so it cannot.
Which plan: A free account's green wallet caps at ⚡20 a day and refills continuously toward that cap — about one credit every 72 minutes rather than a lump at midnight. Unused balance does not stack; it fills to the cap and stops.
| Plan | Green credits a day | Parallel jobs |
|---|---|---|
| Free | 20 | 2 |
| Starter | 100 | 3 |
| Creator | 200 | 5 |
| Pro | 400 | 10 |
| Ultra | 2,000 | 100 |
The own-GPU image lane is what green credits buy. Every model below runs on our hardware and starts at ⚡1 an image.
What it costs: Prices on our own hardware start at ⚡1 an image. They are set at runtime and can carry a demand multiplier when the render queue is deep, and if the local lane is unavailable the same model is served over a paid API and billed in gold instead. Treat ⚡1 as a floor, not a fixed price.
One hosted model is genuinely free on every plan: GPT Image 2 runs at 0 credits and accepts up to six reference images. The daily allowance rises with the plan — three runs a day on Free, ten on Starter, twenty-five on Creator, seventy-five on Pro and two hundred on Ultra. It rides a shared subscription rather than a metered API key, which is also its limit — when that subscription's daily allowance is exhausted the model pauses for everyone until it resets. It is a real option, not a way to avoid spending credits.
Try it with a starter prompt — Opens the composer with this prompt loaded. Nothing runs until you press Generate.
The wallet refills at a fixed rate, so the only real variable is how many credits each attempt costs you. Four habits account for most of the difference between twenty useful pictures a day and five.
One thing that does not help: waiting for a quiet moment to get a cheaper price. The demand multiplier applies to what a render costs while the queue is deep, and it is visible on the Generate button before you press it — but the base rate is set by us, not by the clock, so there is no cheap hour to wait for.
The own-GPU models are smaller than the hosted frontier ones, and that changes what a good prompt looks like. They follow concrete, physical description well and abstract art-direction badly. "Shot on 35mm, shallow depth of field, overcast light from the left" lands; "evocative, award-winning, masterpiece" does almost nothing except spend a credit.
Order matters more than length. Put the subject first, then what it is doing, then where it is, then the light, then the camera. If a detail is essential, say it once and plainly rather than three times in different words — repetition does not weight it, it just crowds out the rest of the description.
Being straight about this is more useful than a longer feature list. The free plan stops in five specific places.
| Limit | On the free plan | What lifts it |
|---|---|---|
| Daily credits | ⚡20, refilling | Any paid plan raises the cap |
| Hosted models | Not reachable with green credits | Buying gold credits, or a plan that grants them |
| Watermark | Always on | Creator and up can switch it off |
| Parallel jobs | 2 at a time | Starter 3, Creator 5, Pro 10 |
| Storage | 50 MB | Every paid tier raises it |
Watch out: Green credits are never for sale. Buying credits buys gold, which pays for hosted models and queue priority — it does not raise your daily green allowance. Only the plan does that.
It is a recurring allowance, not a trial. The green wallet refills toward its daily cap every hour, for as long as the account exists. There is no card required and nothing expires into a paywall.
Roughly twenty on the own-GPU lane, where images start at ⚡1. Prices are set at runtime and can rise when the render queue is deep, so treat it as about twenty rather than exactly twenty.
Yes, subject to the Terms. Output on the free and Starter plans carries an OpenModels watermark, which Creator and higher plans can switch off.
No. Those are hosted models billed per call by their provider, and green credits cannot pay for them. They open from the Starter plan, paid in gold credits.
For the daily allowance, yes. Without one you can still generate a single real picture on Z-Image Turbo before signing up, and it is kept and moved to your account when you do.