Verifiers v0.1.3 Release Notes

Date: 8/26/25

Verifiers v0.1.3 adds a number of features for expanded functionality and ease of use, along with additional library integrations and bug fixes.

Highlights

• We now have a TUI! 🎉 Run vf-tui to interactively browse all locally-saved evaluation results in your terminal.
• Overhauled logging for vf-eval evaluation results with tagged JSON artifact folders.
  • Defaults to saving in your environment's project directory under outputs/ if developing locally; ./outputs if using an environment installed from elsewhere.
  • The short-lived Markdown report outputs are now deprecated.
• Multimodal-input tasks are supported for evaluation (see environments/mmmu for an example)! Official trainer support in verifiers is pending, and can be accessed via HUD's hud-vf-gym project.
• Optional async for reward functions, tools, and Environment class methods
  • maybe_await pattern for safe accommodation of both sync and async functions
  • Sync extensions of env_response and is_completed in MultiTurnEnv will work, but with a type warning; users are encouraged to migrate these functions to async for ongoing usage.
• Full JSON sampling args in vf-eval via -S (#240).
• Official community examples library under very active development: prime-environments
• Native init/push/pull/install support in prime-cli (and more...)
  • Run uv tool install prime for a preview 🙂
• Feature-complete support for training and online evaluations in prime-rl.
• Improved caching and parallelization for JudgeRubric.
• Rubric.class_objects values are available to all reward functions by key name.
• Bug fixes for tool call sanitization and saving datasets to Huggingface
• Improvements to documentation.
• From the recent 0.1.2.post1 pre-release version:
  • StatefulToolEnv for intercepting function calls for routing and state management (#224)
  • Improved lazy imports for efficient evaluation.
  • Overhauled MathRubric for math-verify as default reward.
  • Full support restored for completions generation (#201, #196).
• New required dependencies since 0.1.2: rich, textual, jinja.

Thanks to everyone who contributed to this release!

• @lakshyaag (#240, #241)
• @cat-state (#238)
• @qgallouedec (#218, #217)
• @vgel (#201, #196)
• @nathom (#200)
• @snellingio (#195, #194)
• @MarwanMashra (#184)
• @alanxmay
  And a special thanks to the entire Prime Intellect team, with PRs this cycle from:
• @JannikSt
• @mikasenghaas
• @samsja

Stay tuned for some big announcements in the coming days 😊

Full Changelog: v0.1.2...v0.1.3