Musk March 2024: all FSD training is for Hardware 3 — HW3 Claim            [ Ir al contenido ](#main) [ ![](https://hw3claim.nl/favicon.svg)

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  3 Tesla leadership

30 marzo 2024

Musk on X, March 2024. "All training is for Hardware 3." Two years later, it's all HW4-only.
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On 30 March 2024, Elon Musk stated on X that all FSD training was for Hardware 3 and that HW4 was running in emulation mode. Two years later, FSD was approved by the Dutch RDW, exclusively for AI4. The March 2024 promise was never kept.

 “

> Hardware 4 will ultimately be better, but all training is for Hardware 3, with HW4 running in emulation mode.

   ![Screenshot of Elon Musk's X post from 30 March 2024 about HW3 training](https://hw3claim.nl/images/evidence/03-musk-tweet-hw3-training.png)  X post by Elon Musk, 30 March 2024. Musk states that all FSD training targets Hardware 3 and that HW4 runs in emulation mode.

What Musk said
--------------

On 30 March 2024, Elon Musk responded to a question on X about the relationship between Hardware 3 and Hardware 4 for FSD. His answer:

> Hardware 4 will ultimately be better, but all training is for Hardware 3, with HW4 running in emulation mode.

Why this matters
----------------

This statement is strong evidence for three reasons.

1. **It's a direct commitment.** Musk doesn't say HW3 is "being considered" or "not completely given up on" (the walkback Tesla would make later in Q3 2025). He says **all** training is for HW3. Not "most of it". Not "some of it". All of it.
2. **HW4 is secondary at that point.** Musk explicitly states that HW4 in March 2024 was running in emulation mode, meaning it was emulating the HW3 model. HW3 was the primary development platform.
3. **The timeline is devastating.** March 2024: "all training is for HW3." January 2025: "we will need to replace all HW3 computers." October 2025: "we've not completely given up on hardware 3." April 2026: RDW approves FSD, exclusively for AI4. In two years, HW3 went from primary development platform to unsupported for the approved version.

Not a private remark
--------------------

This statement was made on X, publicly, to millions of followers. It's not an internal memo or a leaked email. It's a public declaration from Tesla's CEO to his customer base. Every HW3 owner who in March 2024 was considering keeping their car, renewing their FSD subscription, or buying a new subscription, could and was entitled to rely on this statement.

The timeline in five steps
--------------------------

DateStatementSource30-03-2024"All training is for Hardware 3"Musk on X21-08-2024HW3 runs a "relatively smaller model"Elluswamy on X29-01-2025"We will need to replace all HW3 computers"Musk, Q4 2024 Earnings Call22-10-2025"We've not completely given up on hardware 3"Taneja, Q3 2025 Earnings Call10-04-2026RDW approves FSD, exclusively for AI4RDWIn nineteen months, the position went from "all training is for HW3" to "not completely given up on". That's not evolving insight. That's a pattern of promises being systematically walked back.

Source verification
-------------------

The X post is publicly available:

- https://x.com/elonmusk/status/1773882855762047301

Publicado el 13 abril 2026

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