Free
$0/mo
Try the full IDE on real targets.
- Full desktop IDE: edit, build, flash, debug, serial
- HardwarePilot on Claude Haiku
- Enough usage to try HardwarePilot every month
- Hard stop at the limit. No surprise bills
Pricing
Plans for firmware work
Start free on the full IDE. Upgrade when you need stronger models, more HardwarePilot usage, or a shared team workspace.
Pro
$25/mo
Daily firmware work with stronger models.
- Everything in Free
- Haiku, Sonnet, and Opus. Pick or Auto-route
- Included AI usage every month, metered in your dashboard
- Optional overage with a spend cap you set
- Optional Frontier mode for harder tasks
Power
$75/mo
More headroom for heavier daily work.
- Everything in Pro
- More included AI usage every month, metered in your dashboard
- Frontier mode included in your pool, no opt-in needed
- Optional overage with a spend cap you set
Max
$200/mo
Maximum headroom for the heaviest workloads.
- Everything in Pro
- Maximum included AI usage every month, metered in your dashboard
- Frontier mode included in your pool, no opt-in needed
- Optional overage with a spend cap you set
Usage on every plan, Free included, is metered from real model cost. Free is Claude Haiku only. Billing docs · Sign in
Named models, metered usage
HardwarePilot runs on Claude models through your Prescaler account. Pick Haiku, Sonnet, or Opus yourself, or leave routing automatic.
01
Haiku
Fast default. Included on every plan, including Free.
02
Sonnet
Stronger reasoning for hard firmware questions. All paid plans.
03
Opus
Highest capacity for deep debugging and design work. All paid plans.
04
Frontier mode
Claude Fable 5, included in the pool on Power and Max, opt-in overage on Pro and Team.
FAQ
Questions engineers ask first
Tooling, targets, probes, privacy, and billing. Answered from what ships today.
macOS 13+ on Apple Silicon is the primary download path. Linux and Windows builds exist; treat them as secondary until they match macOS maturity.
Fourteen profiles ship in the catalog. STM32F405 is verified end to end on real hardware and QEMU, and it's the one to start with. F411 boots and runs under QEMU emulation, though not yet on physical silicon. Eight more (F103, H743, nRF52840, F746, L476, G031, nRF52832, and SAMD21) compile and link with the toolchain but haven't booted on a board yet; SAMD21 currently covers GPIO and clock gating only, with UART support still to come. F407VG and G071RB share proven OpenOCD tooling with their verified F405/G031 siblings but haven't been individually tested. RP2040 is configured in the catalog and queued for testing. ESP32-WROOM-32 ships with register data (Espressif's own SVD) so the Peripheral Browser and register-grounded AI answers work for it, though build and flash aren't wired up in-app yet. See the hardware docs for the full per-chip breakdown.
Prescaler builds with CMake or PlatformIO in the IDE. Flash and debug run over ST-Link, J-Link, or CMSIS-DAP from the same window. You can still open a terminal, but the default loop does not require juggling separate tools.
STM32F405 includes a QEMU path so you can exercise build, run, and debug without a board. Other catalog MCUs expect real silicon and a supported probe.
Yes. Open or import a CMake or PlatformIO project and keep working in the IDE. How deep it goes depends on your project, but the F405 demos are the smoothest place to start.
HardwarePilot builds a bounded prompt from open files or selection, SVD snippets, serial lines, build errors, debug state, and optional datasheet text excerpts. Agent mode may read additional project files and include their contents in later turns.
Edit, build, flash, debug, and serial stay local. When you use live HardwarePilot, that bounded context goes to Prescaler's cloud proxy and then the model provider. Live AI isn't available offline or air-gapped.
On every paid plan you can choose Haiku, Sonnet, or Opus yourself, or leave routing automatic: it starts on Haiku and moves up to Sonnet mid-run if the question turns out to need it. Free is Haiku only within the monthly request limit. Frontier mode (Claude Fable 5) is included in the pool on Power and Max, and a separate opt-in on Pro and Team.
Free counts Haiku requests (50/month) and hard-stops. Every paid plan meters usage as dollars in your account. You can enable overage with a spend cap; when the cap is hit, HardwarePilot hard-stops. There is no silent model downgrade.
Yes, live HardwarePilot requires sign-in. Free includes 50 Haiku requests a month once you create an account; there's no anonymous guest access.
Team is priced per seat with pooled AI usage across the workspace, invites, and owner / admin / member roles. The owner manages overage and Frontier settings for the team.
File bugs and hardware requests on GitHub Issues. Check the changelog for what shipped in each public build, and the security notes for what leaves the machine when AI is on.