Convertible Child Safety Car Seats: what Claude and GPT would buy

Two AI models chose on their own, with no web access. Nobody tested these products: this is what each one says, and how to check it.

Claude and GPT choose the same product: Graco Extend2Fit

In Baby Products, Claude and GPT choose the same brand in 21 of 32 categories.

Claude Opus 5.5 · October 27, 2026

Graco Extend2Fit (line)

The extension panel adds rear-facing legroom, so children can stay rear-facing longer, and it does this at a mainstream size and weight.

Not for: Three-across setups or very compact cars where its depth when rear-facing crowds the front seats.

GPT 6.1 Sol · November 11, 2026

Graco Extend2Fit (line)

A 50-pound rear-facing limit, adjustable legroom extension, and no-rethread harness make extended rear-facing practical.

Not for: Families wanting a detachable infant carrier or stroller-compatible seat.

Clek Foonf (line)

A narrow, steel-reinforced convertible with rigid LATCH for tight rows.

Not for: Parents who need a light seat to move between cars.

Cosco Scenera Next (line)

Very light and basic, so it is easy to carry through an airport or keep in a grandparent's car.

Not for: Daily primary use when you want long rear-facing room and padding.

Nuna Rava (line)

Easy belt install and a no-rethread harness in a premium build.

Not for: Shoppers who want a lightweight seat.

Rear-facing room. Prefer a high rear-facing height and weight limit plus leg space so the child does not get turned forward early. Extended rear-facing is the main safety reason to choose a particular convertible.
Newborn fit. If using from birth, check the lowest harness slot and infant insert fit a newborn. Some convertibles only fit larger babies well.
Recline in your car. The seat must reach its required rear-facing recline indicator without excessive front-seat intrusion. Incorrect recline can compromise a young baby's airway and crash protection.
Install method. Confirm a tight install with both LATCH and seat belt; plan to switch to the seat belt once LATCH weight limits are exceeded. You will likely use both methods over the seat's life.
No-rethread harness. A headrest that adjusts harness height without unthreading straps. Makes it far more likely the straps stay at the correct height as the child grows.

Shops seen in search results on November 5, 2026. A shop missing here may sell it too. Nothing was checked by a person.

Are bent legs a reason to turn forward-facing?

No; bent legs are comfortable and normal, so stay rear-facing until the seat's rear-facing height or weight limit is reached.