How Long AI Training Roles Stay Open

Method and definitions

The public job boards of the AI training platforms this site tracks, read every day since 3 Aug 2026. Every figure is computed by one database query over the window shown, the same query for the live report and for every edition. Each figure states its sample beneath it.

Listing date

The date the platform's job board gives for the posting, or else the first day the role appeared in the feed. A role that arrived with a platform's back catalogue and gives no date has no known listing date.

Cohort

Every role with a known listing date listed in the 26 weeks to the end of the period (from 3 Aug 2026, the start of this site's index, at the earliest), except each platform's back catalogue: the roles it already had up in its first week in this dataset.

Lifetime

From the listing date to the last day the role was seen in its platform's feed, in hours, stated in days. A role still listed at the end of the period has lasted at least that long: it is censored, not removed.

Still listed after N weeks

The Kaplan-Meier estimate of the share of roles still in their feed N weeks after their listing date. It counts every role for as long as it has been seen, so roles still listed are not mistaken for short-lived ones. A role first seen more than two days after its listing date surfaced late and counts only from the age it was first seen.

Median lifetime

The age by which half the roles are estimated to have come down. Not reached when more than half are still listed at the oldest age the data covers.

Removed-only median

The median days from listing to last sighting among roles that have already come down, the usual 'median days listed'. It leaves out the roles still up, which are the longer-lived ones, so it is shorter than the median lifetime.

Re-listed

A removed role followed within 14 days by a listing with the same title on the same platform.

Evergreen role

A role open at the end of the period that was listed at least 60 days earlier.

Weekly churn

Of the roles open at 00:00 UTC on a Monday, the share removed during that ISO week, on the platforms tracked before the week began.

Kind of work

Each role is classified from its title and description into one of the twelve kinds of AI training work this site tracks, from AI evaluation and coding to multilingual and audio work. Every kind links to its own page.

Window

Live: roles listed in the 26 weeks to yesterday (from 3 Aug 2026 at the earliest), in UTC. Edition: roles listed in the 26 weeks to the end of that month (from 3 Aug 2026 at the earliest), observed to the end of the month.

What this data cannot tell you

• Platforms that recruit without a public job board are not counted. Several large ones invite workers to projects directly.
• A listing is not a hire, and a removed listing may have been filled, paused or closed: platforms do not say which.
• Some platforms take roles down and post them again (some weekly) or post one listing per country or language, so a short listing life is not always a short opening. The re-listing column shows where.
• Feeds are read about once a day: a role listed and removed within a day may be missed, and a removal is dated to the last read that still saw the role.
• Ages beyond what the cohort has been observed for are not estimated, so a young edition shows the longer ages as n/a.
• A platform that takes a batch of roles down at once (a project closing, a board reorganised) shows as a single high week of churn.

How the job feeds are read and roles are classified: site methodology. How fresh, complete and consistent the data is, checked every day: data quality and coverage.

Editions

The live report follows every role listed in the 26 weeks to the last complete day (from 3 Aug 2026 at the earliest), and changes every day. Each complete month is also published as an edition, frozen two days after the month ends, so a figure you cite from an edition never moves.

• Live dataEvery role listed in the last 26 weeks, recomputed daily
• September 2026 editionFrozen 10 Oct 2026
• August 2026 edition (this page)Frozen 10 Oct 2026

Cite and reuse

Free to quote, chart and republish under CC BY 4.0 with a link to this page. This edition is frozen, so its figures will read the same later.

@misc{aitrainingjobs_how_long_ai_training_roles_stay_open_2026_08,
  author = {{AITraining.jobs}},
  title = {How Long AI Training Roles Stay Open, August 2026 edition},
  year = {2026},
  howpublished = {\url{https://www.aitraining.team/research/how-long-ai-training-roles-stay-open/2026-08}},
}

More research

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• AI Training Market ConcentrationHow many platforms compete for each kind of AI training work, and how much of it does the leader hold?Read the report
• When AI Training Roles Are PostedWhen are AI training roles posted, and when do people apply?Read the report
• Where AI Labs Are Pushing: The Expertise Being Hired, Week by WeekWhich kinds of expertise are AI training platforms hiring more of, week by week?Read the report
• AI Training Vendor HealthWhich AI training platforms are growing, holding or shrinking their hiring, and how are their rates moving?Read the report
• The State of AI Training PayWhat does AI training work pay, by kind of work and by platform?Read the report

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