FSD/Robotaxi

AMCI Testing, long critical of Tesla FSD, credits 14.3.4 with "significant improvement"

Jul 29, 2026 · Original AMCI Testing

AMCI Testing, an independent evaluator that has repeatedly criticized Tesla's FSD in the past, says the latest FSD (Supervised) 14.3.4 update shows "significant improvement" — while still stopping short of calling it finished, keeping its "work in progress" caveat.

AMCI Testing is an independent firm that evaluates vehicle performance and autonomous-driving systems, and its track record on Tesla FSD has been consistently critical. Its 2024 1,000-mile evaluation found the system needed driver intervention roughly every 11 to 13 miles, and its releases have used language like "not capable of self-driven taxi duty" and "unreliable performance and potentially dangerous inconsistencies."

Against that backdrop, the assessment AMCI published on July 29 for the latest FSD (Supervised) 14.3.4 update marks a notable shift in tone — the release's headline itself states the update "demonstrates significant improvement."

AMCI still avoided an unqualified endorsement, though — the same headline keeps the phrase "still a work in progress," making clear the firm sees real progress without calling the system finished. With Tesla working toward unsupervised FSD, whether independent evaluators like AMCI keep giving passing grades on future releases remains the thing to watch.

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