The #1 Network for Hiring AI Trainers
Browse our LLM & agent solutions below and post a job to hire from 124,000+ pre-vetted AI trainers — for RLHF, evaluation, red teaming, code review, and more.
LLM & Agent Solutions
Hire domain experts for every stage of LLM development — from training data creation to evaluation, red teaming, and agent testing.
LLM Evaluation
Golden datasets, pairwise ranking, rubric scoring, judge validation, and more
Red Teaming
Jailbreaks, prompt injection, policy bypass, data leakage, and more
Hallucination Audits
Claim verification, citation checking, severity scoring, and more
RLHF & Preference Data
Pairwise ranking, multi-criteria scoring, rewrites, failure tagging, and more
Supervised Fine-Tuning
Instruction data creation, domain verification, synthetic data QA, and more
Code Generation Review
Verification, RLHF ranking, bug detection, security review, and more
Function Calling
Tool selection, argument annotation, multi-step traces, error recovery, and more
Computer Use Agent Training
Trajectory data and evaluation for browser and desktop agents
Reasoning Step Verification
Step-level correctness labels for training process reward models
Multilingual AI Training
Native-speaker RLHF, evaluation, prompt writing, and more across 100+ languages
Reasoning Problem Creation
Original problems with step-by-step solutions in math, code, and more
Agent Simulations
Scenario design, gold trajectories, rollout evaluation, failure tagging, and more
RL Environment Design
Reward functions, training scenarios, and environment QA for RL agents
How AI Training Works on OpenTrain
Define Your AI Training Requirements
Describe the task type, domain expertise needed, evaluation framework, and quality bar. Whether it’s RLHF preference ranking, code review, red teaming, or multilingual evaluation — published pricing means no negotiation.
We Screen & Match AI Trainers
Every candidate passes live domain assessments in their field — math PhDs for reasoning, senior devs for code review, linguists for multilingual tasks. You receive a curated shortlist with verified expertise.
Review & Hire Your Team
Browse matched AI trainers with verified domain expertise, evaluation scores, and language capabilities. Pick exactly who fits your project requirements and quality standards.
Deploy Into Your Training Pipeline
AI trainers work directly in your tools and frameworks — no platform migrations, no onboarding delays. They start contributing to your training pipeline on day one.
The #1 Network for AI Training
Post an AI training job and get matched with pre-screened domain experts, or let us recruit and manage a dedicated AI training team for you.
Post Your AI Training Job
Describe your requirements and receive a curated shortlist of domain experts matched to your project. 15% flat fee, no hidden markups.
Full-Service, End-to-End
- Recruiting & live vetting
- Onboarding & training
- Daily management & QA
- Dedicated program lead
Build a career training the world's top AI models.
Freelance AI Trainer?
Join 124,000+ freelancers
Data Labeling Company?
Find clients and recruit talent
Works With Every AI Training Platform
Pre-Vetted Experts
Countries
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LLM & Agent Training Questions
Common questions about hiring AI trainers through OpenTrain.





















