Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | DJI - Osmo Action 4 | DJI - Osmo Action 5 Pro |
|---|---|---|
| Waterproof depth | 18 m | 20 m |
Between the Osmo Action 4 and Osmo Action 5 Pro, the Osmo Action 4 comes out ahead in several specs, while the Osmo Action 5 Pro wins on waterproof depth. Overall, the Osmo Action 4 scores 80.8 and the Osmo Action 5 Pro scores 81 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (80.8 vs 81). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.
The Osmo Action 4 does not pull ahead on any single popular-comparison spec — its strengths sit in the spec-table groups rather than the headline advantages.
Pick the Osmo Action 5 Pro if you care most about waterproof depth. Its strongest claims are waterproof depth. The single most decisive one: Waterproof depth — 11.11% more. 20 m vs 18 m.
Both ship with comparable max video, max 4k fps, stabilization, so those specs do not separate the two — focus on the differences below.
Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity says both are well-rounded; the differences are about trade-offs, not quality.
Which should you buy: DJI - Osmo Action 4 or DJI - Osmo Action 5 Pro?
DJI - Osmo Action 5 Pro leads the current Mars Score by 0.2 points.The more useful decision is the trade-off behind that result: compare waterproof depth against the way you will actually use the product.
Choose DJI - Osmo Action 4 if…
DJI - Osmo Action 4 does not lead a decisive measured field here, so choose it for price, ecosystem, design, or availability when those matter more to you.
Choose DJI - Osmo Action 5 Pro if…
DJI - Osmo Action 5 Pro has the measurable edge on water depth m.
This is a structured comparison of the published catalog values. It is not a claim of identical real-world performance across every workload; use the linked spec drill-downs and methodology page to inspect the inputs.
Why DJI - Osmo Action 4 wins
- No decisive advantages.
Why DJI - Osmo Action 5 Pro wins
- ▲Waterproof depth — 11.11% more. 20 m vs 18 m.
Spec comparison
Video
| Spec | DJI - Osmo Action 4 | DJI - Osmo Action 5 Pro |
|---|---|---|
| Max video | 4K120 | 4K120 |
| Max 4K fps | 120 | 120 |
| HDRⓘ | true | true |
| Log profileⓘ | true | true |
Stabilization
| Spec | DJI - Osmo Action 4 | DJI - Osmo Action 5 Pro |
|---|---|---|
| Horizon lock | true | true |
| Stabilization | gimbal-class | gimbal-class |
Durability
| Spec | DJI - Osmo Action 4 | DJI - Osmo Action 5 Pro |
|---|---|---|
| Waterproof depth | 18 m | 20 mlead |
| Weight | 145 glead | 146 g |
| Removable lens | false | false |