Tesla FSD Reaction Times Compared: v14 Lite vs v12.6.4 vs v14.3

A technical test measured Tesla Full Self-Driving (FSD) reaction times across three setups: v12.6.4 on HW3, v14 Lite on HW3, and v14.3.4 on HW4. Using a dummy pulled into the vehicle’s path, the latency between obstacle appearance and vehicle response was recorded. FSD v14 Lite improved reaction speed by 37% over v12.6.4, averaging 0.675 seconds, while v14.3.4 on HW4 reached 0.450 seconds, 33% faster than v14 Lite. The Lite version adapts the v14 architecture for HW3’s memory constraints, serving as a temporary bridge until hardware upgrades arrive.

• FSD v14 Lite reduces reaction times to 0.675 s on HW3
• FSD v14.3.4 on HW4 achieves 0.450 s, 33% faster than v14 Lite

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