First Nature

Training data and environments for frontier models

License what we have already built, or have it built for your model.

Capabilities

How to buy

Off the shelf or built for you

Delivered in the form your training needs

RL environments
Self-contained environments built on real software, APIs and tools, where agents do multi-step work and every outcome is checked.
SFT and reasoning traces
Expert-quality demonstrations with full reasoning, written to teach models how to plan and work through complex tasks.
Preference data
Carefully ranked comparisons that capture what makes one answer better than another, for RLHF and DPO.
Methods we support
RL · RLHF · RLSF · GRPO · SFT · DPO · (M)OPD · SDFT · OPSD · PivotRL · and more

Data catalog

Request access to browse our off-the-shelf datasets across every capability above.

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