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• New features
  • Filament presets for PVA and BVOH are now available directly on the printer for loading these filament types.

• New features
  • HT hotend support with automatic hotend detection
  • PPS and PPA filament presets for the HT hotend
  • PVA and BVOH filament presets
  • Filament color support
  • Tool mapping presets and Smart mapping
  • Automatic Z-axis alignment on uneven bed
  • Runout Reaction setting for instant or delayed runout handling (#5423)
• Changes and improvements
  • New versioning policy
  • Bed now moves further down after finishing, pausing or stopping a print [6.9.0]
  • Reorganized Tune menu [6.9.0]
  • Tool mapping is now preserved when reprinting a job [6.9.0]
  • New Customize button for tweaking a loaded filament
  • Stuck filament dialog now offers Ignore and Disable options [6.9.0]
  • Improved Nozzle Wiper cleaning [6.10.1]
  • Parking now lifts the Z axis faster [6.10.2]
  • Heater selftest now lowers the bed further to leave room for hands [6.9.1]
  • Chamber vents now close automatically at the end of a print [6.9.0]
  • Filament sensor selftest now detects a disconnected sensor [6.9.0]
  • G-code lines sent over USB/serial that are too long now show a warning
  • PrusaLink file downloads now keep long file names
  • Prusa Connect now shows changed chamber, fan and light values within seconds
  • MMU filament menu now shows the loaded filament and its color [MMU]
• Fixes
  • Fixed unreliable homing [C1/+] [6.9.1]
  • Fixed the Wi-Fi connection hanging after a communication error [6.10.2]
  • Fixed the PNG thumbnail of plain G-code files not showing in Prusa Connect
  • Fixed chamber temperature serial reporting format
  • Fixed an extra blob of filament when resuming after a power failure [6.9.0]
  • Fixed settings being lost when power was cut while they were being saved [6.10.1]
  • Fixed retract or purge running on a nozzle cooled down by the safety timer [6.9.0]
  • Fixed the Not enough tools G-code check blocking prints with no way to bypass it
  • Fixed a crash when the door was opened during homing
  • Fixed wrong remaining time after resuming from a power failure [6.9.0]
  • Fixed factory reset of the HW configuration not resetting calibrations [6.9.0]
  • Fixed M340 refusing to set the syslog host when metrics were allowed [6.9.0]
  • Fixed a crash on the print preview screen
  • Fixed text overflowing on the factory reset screen
  • Fixed a crash when changing Front PTFE Length [MMU]
  • Fixed tool mapping being ignored when starting a print from Prusa Connect
  • Display glitch recovery now also works on error and boot screens
  • Fixed not saving a crash dump on a red screen error (RSOD) [6.9.0]

• New features
  • HT hotend support with automatic hotend detection
  • PPS and PPA filament presets for the HT hotend
  • PVA and BVOH filament presets
  • Filament color support
  • Tool mapping presets and Smart mapping
  • Automatic Z-axis alignment on uneven bed
  • Runout Reaction setting for instant or delayed runout handling (#5423)
  • Changes and improvements

• New versioning policy
  • Bed now moves further down after finishing, pausing or stopping a print [6.9.0]
  • Reorganized Tune menu [6.9.0]
  • Tool mapping is now preserved when reprinting a job [6.9.0]
  • New Customize button for tweaking a loaded filament
  • Stuck filament dialog now offers Ignore and Disable options [6.9.0]
  • Improved Nozzle Wiper cleaning [6.10.1]
  • Parking now lifts the Z axis faster [6.10.2]
  • Heater selftest now lowers the bed further to leave room for hands [6.9.1]
  • Chamber vents now close automatically at the end of a print [6.9.0]
  • Filament sensor selftest now detects a disconnected sensor [6.9.0]
  • G-code lines sent over USB/serial that are too long now show a warning
  • PrusaLink file downloads now keep long file names
  • Prusa Connect now shows changed chamber, fan and light values within seconds
  • MMU filament menu now shows the loaded filament and its color [MMU]

• Fixes
  • Fixed unreliable homing [C1/+] [6.9.1]
  • Fixed the Wi-Fi connection hanging after a communication error [6.10.2]
  • Fixed the PNG thumbnail of plain G-code files not showing in Prusa Connect
  • Fixed chamber temperature serial reporting format
  • Fixed an extra blob of filament when resuming after a power failure [6.9.0]
  • Fixed settings being lost when power was cut while they were being saved [6.10.1]
  • Fixed retract or purge running on a nozzle cooled down by the safety timer [6.9.0]
  • Fixed the Not enough tools G-code check blocking prints with no way to bypass it
  • Fixed a crash when the door was opened during homing
  • Fixed wrong remaining time after resuming from a power failure [6.9.0]
  • Fixed factory reset of the HW configuration not resetting calibrations [6.9.0]
  • Fixed M340 refusing to set the syslog host when metrics were allowed [6.9.0]
  • Fixed a crash on the print preview screen
  • Fixed text overflowing on the factory reset screen
  • Fixed a crash when changing Front PTFE Length [MMU]
  • Fixed tool mapping being ignored when starting a print from Prusa Connect
  • Display glitch recovery now also works on error and boot screens
  • Fixed not saving a crash dump on a red screen error (RSOD) [6.9.0]

• Improved chamber temperature estimation.
• Reverted bed lowering to the previous behavior.

• New features
  • New editions: CORE One+ (Gen 2) and CORE One L+
  • Nozzle Wiper support, replacing the previous print-start nozzle cleaning routine
  • GT1.5 belts support
  • Expansion Joints Gen 2 support, with a much shorter Absorbing heat phase [C1+ (Gen 2)]
  • Immediate stop on filament runout
  • Guided calibration order - calibrations and tests declare their prerequisites
• Changes and improvements
  • Reorganized menus - some settings have been moved to different submenus
  • Filament compatibility checks in more places
  • Custom filament names may contain lowercase letters
• Fixes
  • Fixed not restoring original temperature on filament runout/mid-print change
  • More reliable communication with the xBuddy Extension
  • The last file in a folder was not visible, and related file list fixes
  • The printer no longer beeps on boot in Silent mode
  • An upward swipe on the touchscreen is no longer registered as a tap
  • And a lot more

Summary

• New features and improvements
  • Improved filament change between different materials
• Fixes
  • Support for older xBuddy versions
  • Fixed input shaper calibration for CoreXY printers
  • Fixed not loading custom Connect certificates
  • Fixed a crash when printing more than 1024 objects

Added compatibility with Gen 2

Fixes

• Fixed not loading custom Connect certificates

New features:

• Firmware image vendor-signed to prevent a malicious 3rd-party firmware attack vector 

Fixed Bugs:

• Reduced USB filesystem privileges to eliminate a potential attack vector
• Reduced privileges of Klipper components to eliminate potential attack vectors
• Removed unused source code stubs to eliminate potential attack vectors
• Printer REST API sanitized against potential malicious code injection
• Service SSH access removed
• Printer name validation by RFC 1123 fixed

Documents:

• Security content of Prusa Pro HT90 firmware 1.3.56, Advisory ID: PSA-2026-001

• Support for Prusa Connect
• Custom print profiles
• Updated PrusaLink Web
• Exposure time limits
• Reworked handling of USB flash drives
• API key support dropped
• Other improvements
• Bug fixes
• Known issues

• Extend all timers to 255 minutes
• IPA Filtering (new feature)
• Wash cycles (new feature)
• New heating algorithm
• Automatic fans control
• Factory reset option
• Improved self-test
• Bugfixes

• Improved chamber temperature estimation.
• Reverted bed lowering to the previous behavior.

• New features
  • HT hotend support with automatic hotend detection
  • PPS and PPA filament presets for the HT hotend
  • PVA and BVOH filament presets
  • Filament color support
  • Tool mapping presets and Smart mapping
  • Automatic Z-axis alignment on uneven bed
  • Runout Reaction setting for instant or delayed runout handling (#5423)
• Changes and improvements
  • New versioning policy
  • Bed now moves further down after finishing, pausing or stopping a print [6.9.0]
  • Reorganized Tune menu [6.9.0]
  • Tool mapping is now preserved when reprinting a job [6.9.0]
  • New Customize button for tweaking a loaded filament
  • Stuck filament dialog now offers Ignore and Disable options [6.9.0]
  • Improved Nozzle Wiper cleaning [6.10.1]
  • Parking now lifts the Z axis faster [6.10.2]
  • Heater selftest now lowers the bed further to leave room for hands [6.9.1]
  • Chamber vents now close automatically at the end of a print [6.9.0]
  • Filament sensor selftest now detects a disconnected sensor [6.9.0]
  • G-code lines sent over USB/serial that are too long now show a warning
  • PrusaLink file downloads now keep long file names
  • Prusa Connect now shows changed chamber, fan and light values within seconds
  • MMU filament menu now shows the loaded filament and its color [MMU]
• Fixes
  • Fixed unreliable homing [C1/+] [6.9.1]
  • Fixed the Wi-Fi connection hanging after a communication error [6.10.2]
  • Fixed the PNG thumbnail of plain G-code files not showing in Prusa Connect
  • Fixed chamber temperature serial reporting format
  • Fixed an extra blob of filament when resuming after a power failure [6.9.0]
  • Fixed settings being lost when power was cut while they were being saved [6.10.1]
  • Fixed retract or purge running on a nozzle cooled down by the safety timer [6.9.0]
  • Fixed the Not enough tools G-code check blocking prints with no way to bypass it
  • Fixed a crash when the door was opened during homing
  • Fixed wrong remaining time after resuming from a power failure [6.9.0]
  • Fixed factory reset of the HW configuration not resetting calibrations [6.9.0]
  • Fixed M340 refusing to set the syslog host when metrics were allowed [6.9.0]
  • Fixed a crash on the print preview screen
  • Fixed text overflowing on the factory reset screen
  • Fixed a crash when changing Front PTFE Length [MMU]
  • Fixed tool mapping being ignored when starting a print from Prusa Connect
  • Display glitch recovery now also works on error and boot screens
  • Fixed not saving a crash dump on a red screen error (RSOD) [6.9.0]

• New features
  • HT hotend support with automatic hotend detection
  • PPS and PPA filament presets for the HT hotend
  • PVA and BVOH filament presets
  • Filament color support
  • Tool mapping presets and Smart mapping
  • Automatic Z-axis alignment on uneven bed
  • Runout Reaction setting for instant or delayed runout handling (#5423)
  • Changes and improvements

• New versioning policy
  • Bed now moves further down after finishing, pausing or stopping a print [6.9.0]
  • Reorganized Tune menu [6.9.0]
  • Tool mapping is now preserved when reprinting a job [6.9.0]
  • New Customize button for tweaking a loaded filament
  • Stuck filament dialog now offers Ignore and Disable options [6.9.0]
  • Improved Nozzle Wiper cleaning [6.10.1]
  • Parking now lifts the Z axis faster [6.10.2]
  • Heater selftest now lowers the bed further to leave room for hands [6.9.1]
  • Chamber vents now close automatically at the end of a print [6.9.0]
  • Filament sensor selftest now detects a disconnected sensor [6.9.0]
  • G-code lines sent over USB/serial that are too long now show a warning
  • PrusaLink file downloads now keep long file names
  • Prusa Connect now shows changed chamber, fan and light values within seconds
  • MMU filament menu now shows the loaded filament and its color [MMU]

• Fixes
  • Fixed unreliable homing [C1/+] [6.9.1]
  • Fixed the Wi-Fi connection hanging after a communication error [6.10.2]
  • Fixed the PNG thumbnail of plain G-code files not showing in Prusa Connect
  • Fixed chamber temperature serial reporting format
  • Fixed an extra blob of filament when resuming after a power failure [6.9.0]
  • Fixed settings being lost when power was cut while they were being saved [6.10.1]
  • Fixed retract or purge running on a nozzle cooled down by the safety timer [6.9.0]
  • Fixed the Not enough tools G-code check blocking prints with no way to bypass it
  • Fixed a crash when the door was opened during homing
  • Fixed wrong remaining time after resuming from a power failure [6.9.0]
  • Fixed factory reset of the HW configuration not resetting calibrations [6.9.0]
  • Fixed M340 refusing to set the syslog host when metrics were allowed [6.9.0]
  • Fixed a crash on the print preview screen
  • Fixed text overflowing on the factory reset screen
  • Fixed a crash when changing Front PTFE Length [MMU]
  • Fixed tool mapping being ignored when starting a print from Prusa Connect
  • Display glitch recovery now also works on error and boot screens
  • Fixed not saving a crash dump on a red screen error (RSOD) [6.9.0]

Summary

• New features and improvements
  • Improved filament change between different materials
• Fixes
  • Support for older xBuddy versions
  • Fixed input shaper calibration for CoreXY printers
  • Fixed not loading custom Connect certificates
  • Fixed a crash when printing more than 1024 objects

Summary

• New features and improvements
  • Improved filament change between different materials
• Fixes
  • Support for older xBuddy versions
  • Fixed input shaper calibration for CoreXY printers
  • Fixed not loading custom Connect certificates
  • Fixed a crash when printing more than 1024 objects

Summary

• New features and improvements
  • Improved filament change between different materials
• Fixes
  • Support for older xBuddy versions
  • Fixed input shaper calibration for CoreXY printers
  • Fixed not loading custom Connect certificates
  • Fixed a crash when printing more than 1024 objects

Summary

• New features and improvements
  • Improved filament change between different materials
• Fixes
  • Support for older xBuddy versions
  • Fixed input shaper calibration for CoreXY printers
  • Fixed not loading custom Connect certificates
  • Fixed a crash when printing more than 1024 objects

Summary

• New features and improvements
  • Improved filament change between different materials
• Fixes
  • Support for older xBuddy versions
  • Fixed input shaper calibration for CoreXY printers
  • Fixed not loading custom Connect certificates
  • Fixed a crash when printing more than 1024 objects

• Add filament presence check at start of print
• Region Mesh Bed Levelling fixes
• Show filament color/name during M600
• Fix safety timer not handled correctly
• Delay Z-Axis on Autoload
• Replace hard coded crash z lift value with Pause Z lift value.
• Send host actions on filament runout
• Lower MIN_Z_FOR_UNLOAD from 50mm to 20mm
• Add "load filament" if autoload is disabled
• Abort nozzle change if filament is loaded
• PowerPanic related changes
• Reduce ambient shutdown to 80 °C
• Added utils/build.py to be able to compile the firmware
• MMU related changes
• Minor fixes
• Community related changes

• Add filament presence check at start of print
• Region Mesh Bed Levelling fixes
• Show filament color/name during M600
• Fix safety timer not handled correctly
• Delay Z-Axis on Autoload
• Replace hard coded crash z lift value with Pause Z lift value.
• Send host actions on filament runout
• Lower MIN_Z_FOR_UNLOAD from 50mm to 20mm
• Add "load filament" if autoload is disabled
• Abort nozzle change if filament is loaded
• PowerPanic related changes
• Reduce ambient shutdown to 80 °C
• Added utils/build.py to be able to compile the firmware
• MMU related changes
• Minor fixes
• Community related changes

Fixes

• Fixed not loading custom Connect certificates

• Add filament presence check at start of print
• Region Mesh Bed Levelling fixes
• Show filament color/name during M600
• Fix safety timer not handled correctly
• Delay Z-Axis on Autoload
• Replace hard coded crash z lift value with Pause Z lift value.
• Send host actions on filament runout
• Lower MIN_Z_FOR_UNLOAD from 50mm to 20mm
• Add "load filament" if autoload is disabled
• Abort nozzle change if filament is loaded
• PowerPanic related changes
• Reduce ambient shutdown to 80 °C
• Added utils/build.py to be able to compile the firmware
• MMU related changes
• Minor fixes
• Community related changes

• Support for Prusa Connect
• Custom print profiles
• Updated PrusaLink Web
• Exposure time limits
• Reworked handling of USB flash drives
• API key support dropped
• Other improvements
• Bug fixes
• Known issues

• Add filament presence check at start of print
• Region Mesh Bed Levelling fixes
• Show filament color/name during M600
• Fix safety timer not handled correctly
• Delay Z-Axis on Autoload
• Replace hard coded crash z lift value with Pause Z lift value.
• Send host actions on filament runout
• Lower MIN_Z_FOR_UNLOAD from 50mm to 20mm
• Add "load filament" if autoload is disabled
• Abort nozzle change if filament is loaded
• PowerPanic related changes
• Reduce ambient shutdown to 80 °C
• Added utils/build.py to be able to compile the firmware
• MMU related changes
• Minor fixes
• Community related changes

• Extend all timers to 255 minutes
• IPA Filtering (new feature)
• Wash cycles (new feature)
• New heating algorithm
• Automatic fans control
• Factory reset option
• Improved self-test
• Bugfixes

• Add filament presence check at start of print
• Region Mesh Bed Levelling fixes
• Show filament color/name during M600
• Fix safety timer not handled correctly
• Delay Z-Axis on Autoload
• Replace hard coded crash z lift value with Pause Z lift value.
• Send host actions on filament runout
• Lower MIN_Z_FOR_UNLOAD from 50mm to 20mm
• Add "load filament" if autoload is disabled
• Abort nozzle change if filament is loaded
• PowerPanic related changes
• Reduce ambient shutdown to 80 °C
• Added utils/build.py to be able to compile the firmware
• MMU related changes
• Minor fixes
• Community related changes

• Add filament presence check at start of print
• Region Mesh Bed Levelling fixes
• Show filament color/name during M600
• Fix safety timer not handled correctly
• Delay Z-Axis on Autoload
• Replace hard coded crash z lift value with Pause Z lift value.
• Send host actions on filament runout
• Lower MIN_Z_FOR_UNLOAD from 50mm to 20mm
• Add "load filament" if autoload is disabled
• Abort nozzle change if filament is loaded
• PowerPanic related changes
• Reduce ambient shutdown to 80 °C
• Added utils/build.py to be able to compile the firmware
• MMU related changes
• Minor fixes
• Community related changes

• Preheat error improved
• Improved temperature regulation
• Remaining time estimation
• Adjustable beeper notifications
• Incomplete file check updated
• G-code fixes (M27, M110, M115)

• Preheat error improved
• Improved temperature regulation
• Remaining time estimation
• Adjustable beeper notifications
• Incomplete file check updated
• G-code fixes (M27, M110, M115)

• Improved XYZ calibration
• XYZ calibration results are now available in Support menu
• Selftest fixed
• Improved unload filament
• Multi Material
• When stopping a print, user is asked what filaments to unload
• “T?” Gcode added, which selects extruder to use prior to the print
• Added support for MK1