Between the Osmo Action 3 and HERO12 Black, the Osmo Action 3 comes out ahead in waterproof depth, while the HERO12 Black wins on max video. Overall, the Osmo Action 3 scores 95 and the HERO12 Black scores 95 on our Mars Score.
Which should you buy?
These two are evenly matched on the broad strokes, with the decision sitting on which individual spec advantages weigh more for your use.
Pick the Osmo Action 3 if you care most about waterproof depth. The biggest gaps in its favor are waterproof depth.
Pick the HERO12 Black if you care most about max video. Its strongest claims are max video.
Both ship with comparable max 4k fps, stabilization, horizon lock, so those specs don't 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 tells you both are well-rounded; the differences are about trade-offs, not quality.
Why DJI - Osmo Action 3 wins
- ▲Waterproof depth — 60.00% more. 16 m vs 10 m.
Why GoPro - HERO12 Black wins
- ▲Max video: 5.3K (vs 4K120).
Spec comparison
Video
| Spec | DJI - Osmo Action 3 | GoPro - HERO12 Black |
|---|---|---|
| Max video | 4K120 | 5.3Klead |
| Max 4K fps | 120 | 120 |
| HDRⓘ | true | true |
| Log profileⓘ | false | truelead |
Stabilization
| Spec | DJI - Osmo Action 3 | GoPro - HERO12 Black |
|---|---|---|
| Horizon lock | true | true |
| Stabilization | advanced | advanced |
Durability
| Spec | DJI - Osmo Action 3 | GoPro - HERO12 Black |
|---|---|---|
| Waterproof depth | 16 mlead | 10 m |
| Weight | 145 glead | 154 g |
| Removable lens | false | false |
Spec-level deep dives
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