Tesla Software & Feature Roundup: September 2026

🚀 What Shipped Since August 1

2026.26 "Summer" Family → 2026.26.6.5 ✅ Mass rollout

Tesla moved from early 2026.26 / 2026.26.1 builds into a more complete "Summer" line, anchored by 2026.26.6.2 and then 2026.26.6.5 (first seen ~Aug 26, now in mass rollout in NA and expanding globally).

Key additions in the 2026.26.6.x stream include:

• Grok vehicle control — Grok can now change climate, play music, make calls, adjust some controls, and answer Tesla-specific questions; "Hey Grok" and location-based reminders are more widely enabled
• Video calling in Browser — Google Meet, Microsoft Teams, and Discord usable via the in-car browser with interior camera/mic support
• Caraoke scoring & rear-display queue — Singing scores with stars/high scores; rear screens can show a QR code so passengers add songs from their phones
• Multi-camera view while driving — Camera Preview moved out of "Park only"; all cameras visible in a grid and individually, even while driving (via Service > Camera Preview or Grok shortcut)
• Visualization zoom & nav improvements — Persistent zoom level for the 3D driving visualization; "Auto Navigate" / preferred routes and related navigation tweaks
• Parental controls expansion — Rear-display lock and tighter controls for Browser/Theater/Arcade on models with rear screens
• Dashcam/Sentry encryption & blind-spot while parked — Broader enablement of clip encryption and blind-spot warnings while parked across more trims/regions

Distribution-wise, 2026.26.6.5 is now the dominant "Summer" build in many regions, especially on Ryzen/AI4 cars, with 2026.27 test builds appearing in limited fleets.

FSD v14.3.8 (AI4) — Update 2026.26.6.5 ✅ Rolling out

First noticed in late August on AI4 (HW4) vehicles, this is the main FSD track merged into the Summer branch. Reported improvements vs v14.3.6 include:

• Unified AI4 stack — FSD v14.3.8 is the first version to fully merge the Summer Update branch with the AI4 FSD line in North America, aligning features and rollout cadence
• Smoother control & scenario handling — Continued refinements to steering entry, lane positioning, parking approach/centering, and speed profile behavior; fewer unnecessary nags in city driving
• FSD visualizations & app parity — Blue FSD path, "Self-Driving" indicator, and related app visualizations consistent with earlier 2026.20 FSD builds

For most AI4 owners on FSD, 2026.26.6.5 (v14.3.8) is now the target build.

FSD v14.1 Lite (HW3) — Update 2026.26.6.5 / 2026.21.6 ✅ Early rollout

Tesla is now distilling HW4 intelligence into HW3 under the "v14 Lite" label, initially via 2026.26.6.5 for some HW3 cars and 2026.21.6 for others. Key points for HW3:

• HW4-derived training — HW3 learns from HW4 v14 behavior, including reinforcement-learning (RL) and offline model improvements, to handle scenarios more like AI4
• New FSD conveniences — "Start Self-Driving from Park," arrival options, and new speed profiles (including a very conservative "SLOTH" mode) are appearing on HW3 FSD cars in early access
• Limited initial set — Rollout is still phased, with early-access vehicles used to validate performance before wider distribution

Expect HW3 FSD to remain on a "Lite" track (v14.1 Lite / v14.3.x Lite) while AI4 leads on the main v14.3.8+ line.

Other Notable 2026.26 / 2026.27 Point Releases (August)

• 2026.26.6.2 (mid-Aug) — Early Summer build with camera preview while driving, Grok enhancements, and visualization zoom; widely reported by EU owners
• 2026.26.6.5 (late Aug) — The main Summer + FSD merge for AI4; also carries HW3 FSD v14.1 Lite for some cars
• 2026.27.100.1 (late Aug) — Internal/limited test build labeled as a "Summer Update" variant, used to validate further Grok, Caraoke, and camera features before broader 2026.27 branching

📅 September Watchlist

• 2026.26.6.5 wider global rollout 🔜 In progress — Expect this to become the dominant Summer branch through September, especially on Ryzen/AI4 cars, with more countries getting Grok, video calling, and multi-camera features.
• 2026.27 family seeding 🔜 Possible September — After 2026.27.100.1 testing, a first public 2026.27.x branch could appear in September, likely focusing on incremental media, Grok, and UI refinements.
• Next FSD minor (v14.3.9 / v14.4?) 🔜 Possible September — Tesla's recent cadence suggests another FSD point release is plausible in September, but nothing is confirmed yet.
• HW3 FSD v14 Lite expansion 🔜 In progress — More HW3 cars (including older Model S/X) should move onto v14.1 Lite or equivalent as validation completes.
• Unsupervised FSD 🗓️ Q4 2026 target — Still framed as a Q4 2026 target at the earliest, likely starting with limited geographies and fleets.

📊 TL;DR — Feature Status (September 2026)

🎁 Referral Program Status (September 2026)

The Tesla referral program remains unchanged from August 2026:

• Buyer Benefit: 3 months of Free Full Self-Driving (Supervised) — worth $297
• Referrer Earns: $250 in Tesla Credits
• Eligible Models: Model 3, Model Y, and Cybertruck (Premium AWD & Cyberbeast only)
• Note: Model S and Model X are still not eligible for referral benefits as of September 2026