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Preference Model raises $16M seed round led by Andreessen Horowitz to build reinforcement learning environments for AI alignment.

PRIVATEOct 11, 2026

Amount Raised

$16 Million

Round Type

Seed

SoftwareArtificial IntelligenceMachine Learning

Investors

Scale Angel GroupSouth Park CommonsSignalFireAndreessen Horowitz

Description

Preference Model secured $16 million in seed funding led by Andreessen Horowitz, with participation from SignalFire, South Park Commons, Scale Angel Group, and notable researchers including Fei-Fei Li and Ian Goodfellow. The company develops reinforcement learning environments designed to train more capable and better-aligned AI systems while preventing reward hacking. Alongside the funding, Preference Model open-sourced Karotte, a framework that has undergone over one million evaluation runs to provide secure defaults and tools preventing agents from exploiting training infrastructure. The capital will support continued development of RL infrastructure to help AI labs identify model weaknesses and test environments against agents attempting to break them.

Company Information

Company

Preference Model

About

Preference Model builds reinforcement learning environments to train more capable, better-aligned AI systems. The company focuses on creating training environments that resist reward hacking, where AI models exploit weaknesses in tasks or grading systems. They have developed RL environments for several frontier AI laboratories and open-sourced Karotte, a framework for building robust RL environments. Their technology helps AI labs build harder, more reliable training environments as models become increasingly capable.

Fundz sees it the moment Preference Model raises, hires an exec or expands, usually minutes after it happens, and tells you who to reach.

Predictive Intelligence
Strategic

ML-powered predictions for Preference Model's next move

See what Strategic adds

Preference Model raised. Fundz records a round at a median of 3.6 minutes from the SEC filing, with the decision-maker attached.

145 of these a day, filtered to the companies you pick, with the decision-maker attached.

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Fundz is a real-time business intelligence platform powered by agentic AI that proactively delivers personalized daily signals, including funding rounds, executive changes, M&A activity, 13F institutional filings, SEC 8-K events, investor activity, and website modifications, based on each user's watchlist and ICP. A trusted data source at firms such as BlackRock, Oracle, Kleiner Perkins, LinkedIn, HubSpot, and Cloudflare, Fundz democratizes the institutional-grade intelligence that previously required a PitchBook or Bloomberg terminal. Features include FundzWatch™ for automated website change detection, Daily Briefing for AI-powered daily briefings, and unified cross-signal alerts across 281,000+ organizations. Developers and data teams can access these signals programmatically via the Fundz Funding Data API, with transparent published pricing.