Atsushi Hara

Atsushi Hara

Co-founder of Hatch&Co. and ML engineer

Badges

Tastemaker
Tastemaker
Gone streaking
Gone streaking

Maker History

  • PromptProof
    PromptProofTest your LLM prompts with statistical confidence
    Apr 2026
  • 🎉
    Joined Product HuntApril 12th, 2026

Forums

Atsushi Hara

2mo ago

PromptProof - Test your LLM prompts with statistical confidence

PromptProof brings statistical rigor to prompt engineering. Confidence intervals tell you if gains are real, not noise. Test images, videos, and PDFs on major LLMs in one place. Shared datasets, ground truth labels, and role-based access keep your team aligned. In production, trace real user inputs and let team members label them to validate accuracy. Built by an ML engineer tired of shipping "improved" prompts they couldn't prove with other LLMOps tools - not whether you're actually improving.
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