Blog · Last updated 21 Oct 2026 · BakeVideos team

How the Instagram Reels algorithm works (2026)

The Instagram Reels algorithm first shows a new reel to a small group of people, most of whom do not follow you, and widens the audience only if that group keeps watching and reacts (Instagram, April 2024). Instagram's head, Adam Mosseri, has named the signals that matter most as "watch time, likes, and shares (or sends)" (as quoted by Hootsuite). Original content is eligible for recommendations; accounts that keep reposting other people's videos are not. For a new account this is good news: your follower count matters less than whether the first few hundred strangers stay to the end and send it to a friend.

How a reel gets distributed

A small test audience. Since April 2024, eligible reels are first shown to a small audience that does not necessarily follow the account. The best performers are then shown to wider audiences (Instagram).
Your followers. Followers see it in Feed and Reels, ranked by how much they have engaged with you before.
Wider rounds. If the test audience watches, likes and shares at a good rate, the reel moves to bigger groups in the Reels tab and Explore. Most reels stop after the first round; the ones that "go viral" keep passing.

This is why a brand-new account can get thousands of views on its first reels. In our own experiment, a new account posting only AI-made reels reached about 2,700 views on one reel in its first days, almost entirely from non-followers.

The signals that decide it

Signal	What it means	How to raise it
Watch time	How long people watch, including replays	A hook in the first second, no slow intro, an ending that pays off the hook
Shares (sends)	How many viewers send it to someone, usually by DM	A premise people want to show a friend: "what if", a surprising fact, a relatable moment
Likes	How many viewers like it	Matters most with people who already follow you
Originality	Whether you made it or reposted it	Post your own videos; never re-upload someone else's

Mosseri has said the same signals matter for reaching followers and non-followers. A DM to a friend is the clearest sign that a stranger valued the reel, which is why reels people send tend to travel furthest.

Originality: what gets a reel left out of recommendations

From Instagram's April 2024 update (source):

Aggregator accounts, which repeatedly post content from other users that they did not create or materially change, are not eligible for recommendations until they stop.
When a near-identical copy of a recent original exists, Instagram recommends the original instead of the repost.
A new ranking input gives smaller creators more distribution.

A reel you make yourself, AI-made or not, counts as original. A clip cut from a TV show, a film or another creator's video does not, and it can also be taken down for copyright.

Do AI-made reels get shown less?

Instagram's published rules about recommendations are about originality and quality, not about whether AI was used. Meta may add an "AI info" label to content it detects or that you mark as AI-made. Clearly animated or stylised scenes are not mistaken for real events; photo-real scenes of real-looking people are where a label matters most. What does hurt any reel, AI or not, is a weak first second, a slow middle and an ending that does not pay off.

A checklist for every reel

First second: the question or the strangest image goes first. No logo, no "hey guys".
One idea: one premise, told as a story with a "what happens next".
Length that fits the idea: Reels can be up to 3 minutes long (Social Media Today, Jan 2025), but a 30 to 60 second reel that people watch twice beats a long one they leave.
Captions on screen: many people watch with the sound off.
A reason to send it: end on a question, a twist or a "tag someone who…".
Your own content: original characters and footage you have the rights to.
Test with non-followers: On eligible professional accounts, Instagram lets you share a reel with non-followers first (in the reel's advanced settings) and decide later whether followers see it. Use it to try two hooks for the same idea.
Read the right numbers: in Insights, look at watch time, shares and the share of non-followers reached, not only likes.

BakeVideos makes the reel itself from one sentence: the script with a hook first, a natural voice, word-synced captions and music, as real footage, an animated story or a text-message story. Try an idea.

FAQ

How does the Instagram Reels algorithm work? Instagram shows a new reel to a small test audience, mostly non-followers, and widens the audience when that group watches, likes and shares at a good rate. Original content is eligible for recommendations; repeatedly reposted content is not.

What is the most important signal for Instagram Reels? Mosseri names watch time, likes and shares (sends). Watch time decides whether people see the reel through; shares by DM are the strongest sign that a reel deserves to reach strangers.

How do new accounts go viral on Instagram Reels? Every eligible reel is tested on non-followers, so a new account starts on the same footing. Make the first second count, keep one clear premise, give viewers a reason to send it, and post consistently so each reel gets its test.

Does Instagram penalise AI-generated reels? Instagram's recommendation rules focus on originality, not on whether AI was used. Meta may label AI-made content "AI info". A reel you make yourself counts as original; reposting other people's videos does not.

How long should an Instagram Reel be? Reels can run up to 3 minutes, but length only helps if people keep watching. For most ideas 30 to 60 seconds is the safe range: long enough to tell a story, short enough to watch twice.

Bake a video from one sentence →Your first video is free, no card needed.