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OpenTrainPhDMaster's

Computational Mathematics Researcher (Task Author)

Design original research-grade evaluation tasks based on your computational work. Each task should let AI models be evaluated on expert-level mathematics.

Field
Math & statistics
Where
United States, Albania, Algeria, Antigua and Barbuda, Armenia, Australia +89 more
Commitment
part time
Hours
up to 20/week
Asks for
PhD, Master's
Posted
4 days ago

Pay data for your profession: Math AI trainer jobs · PhD AI trainer jobs

How this pay compares

The title points to writing prompts, problems and answers: writing questions, test tasks, rubrics or model answers for a model to learn from. What each kind of AI training work pays

At $100/hr, this role pays more than 62% of the 54 open math & statistics roles with a listed pay range, above the median of $83.

Open math & statistics roles that ask for a PhD have a median of $83/hr (17 roles).

Among platforms with 10 or more priced math & statistics roles, Alignerr has the highest median ($185/hr across 23 roles) and OpenTrain AI the lowest ($49/hr across 26).

OpenTrain AI roles that closed since late October stayed listed a median of 31 days (122 roles). OpenTrain AI posted this one 4 days ago.

Computed from 2,746 open roles we track across Mercor, micro1, Handshake AI, Alignerr, Appen and OpenTrain AI, refreshed daily. Midpoints of listed ranges; “up to” ceilings are left out of medians.

What you would earn at this rate

Rate

$100/hr

Per week, before tax

$2,000

Per month, if the work is steady

$8,667

Tax
Contract pay arrives with no tax withheld. A US contractor at this rate and these hours would set aside about $2,191 a month for self-employment tax plus federal income tax at the 12% bracket (25%, before state tax). Outside the US, your own country's rules apply.

Assumes paid hours only; unpaid assessments, onboarding and gaps between projects lower the real figure. Full take-home calculator · Track what you actually earn

Open math & statistics roles on each platform

The same kind of work, priced on every platform we track, with the best-paid open role on each.

PlatformOpenMedianBest-paid open role
Alignerr23$185/hrApplied Formal Methods Researcher (Lean 4)$170-200/hr
Mercor4$88/hr4 pricedMathematics Domain Expert$90-140/hr
OpenTrain AIthis role26$49/hrResearch Scientist: Formal Methods, Computational Science$135/hr
Handshake AI6up to $75/hrMath ExpertUp to $75/hr

“Up to” rows list only ceilings, so their median is a maximum, not comparable with the range midpoints above them.

All 60 open math & statistics roles →

The full listing

As posted on OpenTrain AI. See the original

The work

Design original research-grade evaluation tasks based on your computational work. Each task should let AI models be evaluated on expert-level mathematics.

  • Set the metrics for judging solutions without revealing the exact passing thresholds.
  • Provide a reference solution and tests for each task.
  • Revise tasks using structured review feedback until they are approved.
  • Optionally review and calibrate tasks from other experts in your field.

What it pays and takes

  • Pay: $100 per hour.
  • Time: 20+ hours per week, with a flexible task-based schedule and no fixed weekly schedule.
  • Location: Open to candidates in the listed countries; this role is not worldwide.
  • Language: Fluent English.
  • Education: Research-track bachelor's, master's, or PhD student, postdoc, or candidate in mathematics, applied mathematics, statistics, or a closely related field.
  • Experience: Hands-on experience writing code, preferably in Python, to implement or validate mathematical methods; ability to turn computational research into a clear task with a reference solution and tests.
  • Work independently and manage your own time.
  • You must be able to work as an independent contractor without visa sponsorship. F-1 visa holders, including those on OPT or CPT, are not eligible.
  • Preferred: Research in numerical methods, optimization, stochastic processes, computational topology, or number theory; public code, a thesis, or papers showing your computational work; or experience in data annotation, data labeling, or AI/ML evaluation.

How it works

Apply on OpenTrain with your resume, then complete the application on the hiring site.

About AI training work

AI training work uses examples prepared and reviewed by people to help AI models learn and improve. OpenTrain is a platform for finding AI training projects, building a profile, and applying; creating an account is free.

From applying to your first payment on OpenTrain AI

  1. 1

    Create a profile

    Create a free OpenTrain profile with your domains, languages and hourly rate.

  2. 2

    Apply

    Apply to the listing. Some listings hire through OpenTrain; others send you to the hiring platform.

  3. 3

    Funded milestones

    The client funds each milestone before work starts.

  4. 4

    First payment

    OpenTrain pays out to your connected payout method when the client approves the milestone. It doesn't publish a fixed payout schedule.

Sources: OpenTrain: AI training careers, OpenTrain docs: invoicing and payouts

Full OpenTrain AI profile: watch-outs and the public record →

Pay history

OpenTrain AI has listed this role at $100/hr since Nov 10, 2026 with no change.

Across OpenTrain AI's math & statistics roles, the median listed pay was $25/hr on Nov 1, 2026 (18 roles) and is $49/hr as of Nov 11, 2026 (26 roles).

What workers report about OpenTrain AI

Anonymous reports from people who applied or worked there: whether they got work, what they were paid and how fast.

Other math & statistics roles

All 60 math & statistics roles →