“No actual physics is ever modeled, and the entities depicted are not constrained by the laws of physics.”
Our reading:
Sora never models actual physics, and the entities in its videos are not constrained by physical laws.
Assessment: Unresolved
What happened
Was it true for the period described?
Outcome: Unresolved
We checked, and the evidence so far doesn’t settle it.
Judged on a plain reading. They named no measure, so we used the reading a typical informed reader would take. It is spelled out under “How we judged it”.
Evidence up to . Checked .
Why
OpenAI's February 15, 2024 preview documents a chair failing to remain rigid, causing inaccurate physical interactions [e3]. This supports the clause that physical laws were not reliably enforced in the preview's outputs, but does not establish that Sora never modeled physical dynamics [e3]. The January 14, 2025 multi-model study reports limited physical understanding alongside successful test cases; it does not settle whether the February 2024 Sora snapshot had learned physical representations [e4]. The categorical absence of physical modeling therefore remains unresolved [e3] [e4].
Caveats
- The output failures do not establish the absence of all learned physical representations [e3].
- The later multi-model study does not provide decisive mechanistic or controlled evidence about the February 2024 Sora snapshot [e4].
Evidence (2 items)
Supports the claim: OpenAI,
inaccurate physical interactions.
Why it matters: This supports the clause about failures to enforce physical constraints. It cannot establish that no actual physics is ever modeled.
- Publisher
- OpenAI
- Kind of source
- Company disclosure: the company describing itself, not an independent finding
- About events on
- Published
Context only: arXiv; Saman Motamed and colleagues,
some test cases
Why it matters: The later multi-model study cautions against equating limited physical performance with no physical capability whatsoever. It neither isolates the original Sora snapshot nor proves a physical mechanism inside it.
- Where
- Abstract
- Publisher
- arXiv; Saman Motamed and colleagues
- Kind of source
- Preprint, not peer reviewed
- About events on
- Published
How we judged it
- Kind of claim
- Observation
- Deadline
- None given. We don’t add one.
Where we had to interpret
- The word ever makes the first clause a categorical claim about the absence of physical modeling, including learned physical representations.
- The second clause is read as saying physical laws are not reliably enforced in generated scenes.
- An absence of an explicitly programmed physics engine would not by itself establish an absence of learned physical modeling.
- The target is the February 2024 research-preview snapshot, the latest publicly documented version before the post.
Right if: Evidence establishes both the absence of physical modeling in the contemporaneous model and the absence of reliable physical-law enforcement in its outputs.
Wrong if: Controlled evidence establishes that the contemporaneous model represents and uses physical dynamics, or reliably enforces the relevant physical laws.
We wrote this test after the outcome was known.
What would settle it
Version-matched mechanistic or controlled evidence establishing that the February 2024 snapshot represents and uses physical dynamics would contradict the categorical claim. Establishing the absence of physical modeling, alongside the documented enforcement failures, would support it.
We found 4 claims in this post. See them all.
Full record
Source and dates
Marcus on AI, No, Sora has not “learned physics”, paragraph 7.
- Said
- We read the source
- live page, full text, public
- Evidence up to
- Checked
We read this wording on 2026-10-29. The post may have been edited after 2024-03-02.
Where it was said (1)
Said once in the posts we read.
: Marcus on AI, No, Sora has not “learned physics”
No actual physics is ever modeled, and the entities depicted are not constrained by the laws of physics.
- Where
- paragraph 7
- Published
- 2024-03-02
- We read it
- , live page
- Access
- full text, public
History
Versions
- Current: Unresolved. Evidence up to 2026-10-28.
What happened to this record
PublishedBy us
Published after both AI reviews and the final check passed.
Held backBy us
The final check failed: a cited source didn’t say what the write-up said.