PLANS & CREDITS
Turn your idea into hardware. Start with 2.5 ACU for 14 days — €5 of AI usage. No card required.
Subscriptions and credit top-ups are available now through Stripe checkout in the web app. Sign in to choose a plan or manage your subscription.
Explore ideas and plan your first device.
Billed monthly
14 days · 2.5 ACU (€5 value)
No card required. No automatic subscription.
Build, test and improve your hardware.
Billed monthly
14 days · 2.5 ACU (€5 value)
No card required. No automatic subscription.
More AI capacity for ongoing development.
Billed monthly
14 days · 2.5 ACU (€5 value)
No card required. No automatic subscription.
Every plan: AI hardware engineering · Shared project files · CAD and PCB viewers · Download your work
A paid plan starts when you complete checkout and replaces the remaining trial allowance. It does not start automatically after the trial. Included ACU renew monthly and do not roll over.
Keep building with extra ACU at €2 each. An active Build or Pro subscription is required to purchase and use top-ups.
Purchased ACU do not expire.
Add 10 ACUPurchased ACU do not expire.
Add 25 ACUPurchased ACU do not expire.
Add 50 ACUStandard processing, ACU per million tokens. Fast mode doubles rates (2.5× for GPT-5.5). Eligible long-context requests double input rates and multiply output by 1.5. Supported flex/batch processing halves rates; cache writes cost 1.25× ordinary input. Reasoning is included in output.
| Model | Input | Cached input | Output |
|---|---|---|---|
| gpt-6-astra | 50 | 5 | 250 |
| gpt-6-sol | 10 | 1 | 50 |
| gpt-6-luna | 0.5 | 0.05 | 2.5 |
| gpt-5.6-sol | 20 | 2 | 100 |
| gpt-5.6-terra | 10 | 1 | 60 |
| gpt-5.6-luna | 1 | 0.1 | 6 |
| gpt-5.5 | 25 | 2.5 | 150 |
| gpt-5.5-pro | 150 | 0 | 900 |
| gpt-5.4 | 12.5 | 1.25 | 75 |
| gpt-5.4-pro | 150 | 0 | 900 |
| gpt-5.4-mini | 3.75 | 0.375 | 22.5 |
| gpt-5.4-nano | 1 | 0.1 | 6.25 |
| gpt-5.3-codex | 8.75 | 0.875 | 70 |
| gpt-5.2 | 8.75 | 0.875 | 70 |
| gpt-5.1 | 6.25 | 0.625 | 50 |
| gpt-5 | 6.25 | 0.625 | 50 |
Sign in to start a one-time 14-day trial with 2.5 ACU, equivalent to €5 at the additional-usage rate. AI work pauses when time or the allowance runs out. No card is required and no paid subscription starts automatically.
Sign in to the web app’s Plans & credits page to purchase a subscription or an eligible top-up through Stripe. In the iOS app, you can view your balance and use your account’s credits; in-app purchases are not available.
Agent Compute Units measure AI work across chat and engineering tasks. Foxy calculates usage from the selected model and actual token consumption using its published credit tariff. Complex requests can use more ACU. Waiting, viewing and downloading existing files do not use ACU.
Each AI task can spend up to 5 ACU, including agent-triggered 3D. Foxy reserves the available amount before work starts and returns the unused part afterwards. A direct 3D generation costs 0.25 ACU when its result is saved successfully. You can stop work and retain the files already created.
Trial credits expire after 14 days. Included subscription credits renew monthly without rollover, including on annual plans. Purchased top-up ACU do not expire; using them requires an active Build or Pro subscription.
The person who submits the AI request pays from their own allowance. Their request keeps the same payer through queued tasks, retries and automatic continuations.
Open Plans & credits in your account and select Manage subscription. Cancellation at the end of the paid term stops renewal. Already-created files remain available to view and download.
No. Components, fabrication, shipping and physical testing are separate. An ACU allowance does not guarantee completion of an entire device.