Tech & product
Best time to post in r/MachineLearning
The best and worst hours to post, the rules that get posts removed, and a check of your draft against both.
Posts in r/MachineLearning are most often removed for self-promotion issues. It is a public subreddit that allows both text and link posts and does not require post flair. In our latest sample of 148 recent posts, an estimated 97% were still up about a day later.
Beginners -> /r/mlquestions or /r/learnmachinelearning , AGI -> /r/singularity, career advices -> /r/cscareerquestions, datasets -> r/datasets
The best and worst hours to post in r/MachineLearning
In our sample of 558 recent and top r/MachineLearning posts, activity and scores peak around Wednesday 5pm UTC, and are weakest around Monday 2am UTC. Based on posts sampled through Sep 4, 2026. Times in this sentence are UTC; the grid below converts to your local timezone. Timing helps a clean post get seen. It does not save a post that breaks a rule.
- Window 1
Wed around 5pm
avg score 358.6 · 5 posts sampled
- Window 2
Sat around 8pm
avg score 249 · 4 posts sampled
- Window 3
Fri around 7pm
avg score 197.7 · 6 posts sampled
Your timezone: UTC (GMT+0). Darker cells mean more posts in our sample.
Compare r/MachineLearning against every tracked community on the best time to post on Reddit tool.
Estimated survival rate
97%
of 148 recent r/MachineLearning posts we sampled were still publicly visible about a day later.
How this is measured
Estimate. We sample recent public posts and check again about 18 hours later to count how many are still publicly visible. Posts removed at the moment of submission never become publicly visible at all, so the true removal rate is at least this high. Last sampled Sep 5, 2026.
r/MachineLearning rules: what actually gets removed
Each rule below is paired with the way it is most likely enforced. Where the rules state a number, we quote it. Where they do not, we say so instead of guessing.
1.No Spam
Enforcement variesr/MachineLearning has held a long-standing, strict policy on spam. The posts deemed to be spam will be removed, and repeat offenders will be permanently banned from participating in the subreddit.
2.No Self-Promotion
Removed by moderatorsr/MachineLearning does not permit the promotion of paid products, wherein the intent is clearly to promote a particular product. However, posts with links to paid products are acceptable, contingent on the fact that the post offers sufficient value to the community members and the intent is to share a resource or collect feedback for an open-dialogue. The decision will be made entirely at the discretion of the moderator team.
3.No Marketing Campaigns (SEO)
Enforcement variesr/MachineLearning strictly prohibits strategic marketing campaigns targeted at community members, and posts intended to rank for SEO purposes. In the event that such behavior is caught, the user in violation of our policy will be perpetually banned with all past posts and comments purged entirely from the subreddit.
4.No Disrespectful Behavior
Enforcement variesr/MachineLearning is an all-inclusive community for a wide range of users, and thereby, kind and respectful behavior is expected in all interactions that occur on the subreddit. Therefore, please be cordial and professional at all times, and be cognizant of the fact that the user base comprises beginners interested in ML and far more experienced, technical individuals with practical experience.
5.No arXiv Links without Body Text
Enforcement variesr/MachineLearning is not a depository of bare arXiv links. Therefore, for users that share research papers, please insert some form of commentary or analysis to initiate a community-wide discussion. In other words, low-effort posts will be removed for research papers.
6.No Low-Effort, Beginner Questions
Enforcement variesr/MachineLearning will expand its scope to allow more content oriented around beginners, for a broader audience to participate in the subreddit. However, there is a fine-line between a question posted by user who, evidently, put in the time to research ML concepts and effort to communicate the guidance needed from industry practitioners, and then those that post questions that can be easily found online. The latter type of post will be removed from the subreddit.
r/MachineLearning does not publish karma or account-age minimums in its rules. Subreddits often enforce unpublished filters on top of what they write down, which is why posts from new accounts can vanish without a message here.
Can you self-promote in r/MachineLearning?
No. r/MachineLearning bans self-promotion outright: product links, launch posts, and thinly framed feedback posts get removed. The sub's own wording: "r/MachineLearning does not permit the promotion of paid products, wherein the intent is clearly to promote a particular product.". If you want eyes on your project, contribute first and look for communities with a promo lane.
r/MachineLearning by the numbers
- Members
- 3.1M
- Active right now
- Not public
- Posts / day
- 6
- 147 comments / day
- Community age
- 17 years
- since Jul 29, 2009
| Median title length | Posts with a link | Posts with flair | Dominant format |
|---|---|---|---|
| 69 characters | 15% | 100% | text posts |
What gets removed in r/MachineLearning
Self-promotion
r/MachineLearning bans self-promo outright. Product links, launch posts, and thinly framed "feedback" posts are removed.
Low karma or a new account
r/MachineLearning publishes no karma or age minimum, but unpublished account filters are common at this size. New accounts should comment before posting.
Reddit's sitewide spam filter
A separate layer before the subreddit ever sees your post. New accounts posting links, URL shorteners, and repeated domains are its favorite targets. Removals are instant and silent.
A shadowbanned account
If the account itself is shadowbanned, every post looks live to you and invisible to everyone else, in any subreddit.
Wondering about a post that already disappeared? Start with why Reddit posts get removed or run the free shadowban check.
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r/MachineLearning posting questions
Can I post links in r/MachineLearning?
Yes. r/MachineLearning accepts link posts. The usual sitewide traps still apply: URL shorteners, affiliate parameters, and brand-new domains get filtered fast, and promotional links are judged against the sub's self-promo rules. One clean link to the original source is the safe pattern.
Does r/MachineLearning require karma to post?
r/MachineLearning does not publish a karma minimum. That does not mean there is none: many subreddits enforce unpublished karma and account-age filters that remove posts silently. If your account is new or has little karma, that is the first thing to rule out when a post disappears.
Can you self-promote in r/MachineLearning?
No. r/MachineLearning bans self-promotion outright: product links, launch posts, and thinly framed feedback posts get removed. The sub's own wording: "r/MachineLearning does not permit the promotion of paid products, wherein the intent is clearly to promote a particular product.". If you want eyes on your project, contribute first and look for communities with a promo lane.
Is r/MachineLearning strict?
Moderate, by our estimate (23/100 on our strictness scale, from its measured removal rate, 6 rules, and its stated gates). About 3% of recent posts disappeared within a day in our sample. Strictness is about enforcement, not hostility: a strict sub is predictable if you follow its rules.
What is the best time to post in r/MachineLearning?
Based on our sample of recent and top posts, activity and scores peak around Wednesday 5pm UTC and Saturday 8pm UTC. Treat this as a starting point, not a guarantee: a post that breaks a rule gets removed at any hour. The heatmap on this page converts these windows to your local time.
Why do posts get removed in r/MachineLearning?
The most common reasons are self-promotion violations, plus the layers every subreddit has: Reddit's sitewide spam filter, unpublished AutoMod rules, and account-level gates like karma and age. In our recent sample, roughly 3% of r/MachineLearning posts disappeared within about a day of going up. Many removals are silent, so checking your draft first beats finding out after.
Rules last checked Sep 2, 2026
Go deeper: how AutoMod removals work, the shadowban explainer, or earning karma the allowed way.
Stop getting silently removed.
Know if your post survives before you hit submit, and fix it if it won't.
Check my post for freePaste a draft · verdict in ~10 seconds