Prusa Firmware 6.10.1 Adds Stable XL+ and XL Support
Prusa’s stable Buddy firmware 6.10.1 supports the XL+ and XL, recognizes the hardware variant automatically, and carries XL forward from 6.4.2.
Prusa released stable Buddy firmware 6.10.1 for the XL+ and XL on August 28. It adds support for the XL+ hardware, lets the printer identify its variant at startup, and carries the original XL forward from its prior 6.4.2 release with changes accumulated through later Buddy versions. Owners should use Prusa’s exact release assets and notes for their machine; this report does not establish upgrade reliability or replace the official installation process.
6.10.1 is stable for both XL+ and the original XL
The release was posted August 28 and supplies the exact tagged assets for the supported machines.
Prusa says no manual XL-versus-XL+ selection is required; the detected type appears in Settings under Hardware.
The stable label and release notes are official evidence, not independent reliability or upgrade-risk proof.
ReportPrusa Research
The XL+ hardware launch now has its matching stable firmware record
Prusa’s Buddy 6.10.1 release supports the XL+ and original XL. For XL+, it adds automatic hardware-variant recognition, contactless tool-offset calibration support, nozzle thermal-expansion compensation, and the associated new hardware support. For the original XL, Prusa says this release carries forward changes introduced after the XL’s previous 6.4.2 release.
The safe conclusion is compatibility and release scope, not measured performance. XL+ owners now have the stable firmware record intended for the shipping hardware. Original XL owners receive a larger accumulated change set than a one-line patch, so the full notes matter. The stable label and release notes are official evidence, not independent reliability or upgrade-risk proof. Prusa calls nozzle thermal-expansion compensation early-stage, and that label should remain attached to the feature. The Crafty Catsman has not installed the firmware, measured calibration, run a print, or tested an XL or XL+ on this release.
This is a compatibility release before it is a performance claim
Prusa lists XL+ support, contactless tool-offset calibration for XL+, nozzle thermal-expansion compensation for XL and XL+, and a bed move-down behavior after finish, pause, or stop. The notes say the XL last received firmware 6.4.2, so 6.10.1 also collects relevant changes from intervening Buddy releases.
Firmware completes the current XL+ handoff: The August XL+ hardware and upgrade records explain what the new machine and kit change. Firmware 6.10.1 is the official software-side handoff for that hardware. It does not alter the current price, order queue, upgrade-kit compatibility rule, or an owner’s exact delivery date.
- How does 6.10.1 behave across existing XL toolhead configurations in long production runs?
- When will Prusa publish any follow-up fixes or narrower point releases?
- How much practical calibration difference does early-stage thermal-expansion compensation make?
Wait if the recovery path is not clear:You cannot confirm the exact printer variant, release asset, installation steps, or recovery procedure from Prusa’s documentation.
Continue with the official release path:Your XL or XL+ matches the release, you have read the complete notes, and you can verify normal behavior after the update.
Buddy 6.10.1 — official XL firmware record
| Firmware field | Prusa Research Buddy 6.10.1 |
|---|---|
| Supported printers | Prusa XL+ and XL |
| Release channel | Stable |
| XL+ hardware identity | Detected automatically at startup |
| Thermal-expansion compensation | Officially described as early-stage |
| Independent installation evidence | Not established here |
Sources: Official stable release
Use the exact release for the exact printer, then verify the result on-device
Confirm that the downloaded asset and Prusa instructions match the XL or XL+ you actually own before updating.
Keep the working firmware in place until the official release assets, printer identity, and recovery path are clear for your machine.
Buddy 6.10.1 ships as stable for XL+ and XL
Prusa adds XL+ hardware support and brings the original XL forward from its prior 6.4.2 branch with the intervening Buddy changes named in the notes.
Primary pages and records used for this report.
Frequently Asked Questions
Is Prusa Buddy 6.10.1 a stable release?▼
Yes. Prusa labels 6.10.1 a stable firmware release for the Prusa XL+ and XL.
Does firmware 6.10.1 support the original Prusa XL?▼
Yes. The official release targets both XL+ and XL. Prusa says the original XL moves from its prior 6.4.2 release and receives the relevant intervening Buddy changes collected in 6.10.1.
Does an XL+ owner need to select the printer variant manually?▼
Prusa says the firmware identifies the XL or XL+ hardware at startup and shows the detected type under Settings → Hardware, so no manual variant selection is required.
Have a launch, correction, or test opportunity?
Brands, product teams, and knowledgeable sources can send relevant details, approved media, or corrections. Coverage is selected independently.
Choose the useful next step.
Use the exact release notes for the firmware decision, then continue into the XL+ lineup and owner-upgrade records for the hardware decision.
Get the next useful Prusa update.
When a source-backed change affects what to buy, update, test, or ignore, we send a short decision brief with the evidence, the workshop consequence, and what remains unknown.
Know what changed. Know what it means at the bench. Decide whether to act, wait, update, test, or ignore.
Scanned daily. Sent only when the signal changes a workshop decision, with a rare alert when waiting would matter.
See how The Workshop Signal works