Tesla software update 2026.38.5.6 was listed on October 24, 2026, adding another build to the 2026.38.5 family. Its eight official entries include FSD (Supervised) v14.3.12 Down Under and associated driving controls for the listed HW4 Model S (New), Model 3, Model X (New), and Model Y. The documented feature descriptions match those in 2026.38.5.5, providing a useful comparison without identifying a specific new correction in this build.
The supervised-driving package describes revised reinforcement-learning training and visual perception for rare situations, reduced visibility, three-dimensional geometry, and traffic signs. Compiler and runtime changes carry a stated 20% reaction-time improvement. Other refinements address close following, lane positioning, parking, emergency vehicles, school buses, animals, difficult traffic lights, and unusual road obstructions. Broader reasoning and pothole avoidance remain upcoming improvements.
Arrival Options supports Carpark, Indoor Carpark, Street, Driveway, and Pull Over. The system remembers preferences and parking positions for each destination, evaluates suitable choices with a reasoning model, and moves the navigation pin to match the selected option. This gives drivers control over how a trip finishes as well as where it ends.
Speed Profiles combines the selected driving style with speed limits and surrounding traffic. SLOTH favors slower driving and more conservative lane choices than CHILL; MAD MAX permits higher speeds than HURRY. Moving the right scroll wheel changes the profile rather than a precise maximum-speed offset. More assertive settings do not remove the requirement for continuous driver supervision.
The interface includes Self-Driving statistics under Controls > Self-Driving, touchscreen activation from Park or during a drive, and direct Speed Profile and Arrival Option adjustments in the visualization. Brake Confirm defaults off for the start button, so pressing and releasing the brake is not required as a confirmation step when disabled. Drivers can enable it under Self-Driving > Brake Confirm.
Halloween Mode separately lists AMD vehicles, including Cybertruck, for themed graphics, visitor effects, a light show, and Photobooth functions. Phone-based Set Arrival Energy requires Tesla App 4.58.0 or later. Security improvements are also included. The illustrated 2026.38.5.6 Release Notes below preserve each entry's vehicle, hardware, and availability requirements.
FSD (Supervised) v14.3.12 Down Under
New Feature
for Model S (New), 3, X (New) and Y
HW4
The Down Under edition of HW4 FSD v14.3.12 describes updated reinforcement-learning training and a stronger vision encoder for uncommon situations, reduced visibility, three-dimensional geometry, and traffic signs. A rebuilt MLIR-based compiler and runtime are associated with a stated 20% faster reaction time and faster development iteration.
Driving refinements target unnecessary lane bias, close following, parking selection and maneuvers, and the predicted parking location shown with a P icon. The notes also cover emergency vehicles, school buses, right-of-way violations, unusual vehicles, small animals, difficult traffic-light arrangements, curved approaches, yellow-light stopping, and objects protruding into the roadway.
Handling of temporary system degradation aims to maintain control and recover automatically, reducing unnecessary disengagements. Driver monitoring gains changes to gaze tracking, eyewear handling, and performance under changing lighting.
After taking over, drivers can select an intervention reason on the display. The Self-Driving App shows intervention-free distance and the longest streak, while destination parking choices appear on the map. This remains supervised driving, requiring attention and readiness to intervene.
Reasoning beyond destination handling and pothole avoidance are listed as upcoming improvements; these should not be read as functions newly available in this release.
Arrival Options
New Feature
for Model S (New), 3, X (New) and Y
HW4
Select Carpark, Indoor Carpark, Street, Driveway, or Pull Over for the destination arrival. The system retains the arrival preference and preferred parking positions for each destination.
A reasoning model evaluates suitable choices and selects a default, and the navigation pin moves to reflect the chosen arrival option.
Speed Profiles
New Feature
for Model S (New), 3, X (New) and Y
HW4
FSD selects speed using the chosen profile, the speed limit, and nearby traffic. More assertive profiles permit higher maximum speeds. SLOTH favors slower driving and more conservative lane selection than CHILL, while MAD MAX permits higher speeds than HURRY.
Moving the right scroll wheel up or down now changes the Speed Profile instead of adjusting a precise maximum-speed offset in mph or km/h.
UI Improvements
New Feature
for Model S (New), 3, X (New) and Y
HW4
View supervised-driving statistics under Controls > Self-Driving. A touchscreen tap can start supervised driving from Park or during a drive, and Speed Profiles and Arrival Options can be adjusted directly from the center display's driving visualization.
Brake Confirm
New Feature
for Model S (New), 3, X (New) and Y
HW4
Brake Confirm for the Start Self-Driving button now defaults off. With that setting disabled, activation does not require pressing and releasing the brake as a confirmation step. To restore that confirmation, enable Self-Driving > Brake Confirm.
Halloween Mode
New Feature
for Model S (New), 3, X (New), Y and CT
AMD / Available Worldwide
On the listed AMD vehicles, add a ghost costume to the vehicle visualization, use visitor-triggered spooky sounds and flickering lights, schedule a themed light show, and apply Halloween effects in Photobooth. The notes describe access beyond the holiday itself.
Set Arrival Energy
New Feature
for Model S, 3, X, Y and CT
Tesla App 4.58.0+ / Available Worldwide
Choose a desired remaining energy level for the destination from a phone. In Tesla App version 4.58.0 or later, open the location tab, enter the destination, and select Set Arrival Energy.
Security Improvements
New Feature
for Model S, 3, X, Y and CT
Available Worldwide
This release includes security fixes and improvements. The official entry does not identify individual vulnerabilities or provide a detailed correction list.
