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Journal

Research and field notes on evaluations, post-training, and better model behavior.

  • Pixel art illustration of robots mining glowing binary digits in an underground mine.

    Perspectives6 min read

    Data is the New Frontier

    By Nick Mecklenburg

    Fireside chat with Mercor’s Brendan Foody about where post-training is heading and why data matters every step of the way.

  • A pixel-art office where glowing data cubes flow through the workspace and across a glass conference room.

    Research15 min read

    Searching Through a Virtual World

    By Nick Mecklenburg

    We trained a 4B model to search a synthetic corporate tenant with 91.1% of frontier performance and greater reliability than its 27B teacher.

  • A pixel-art wooden Trojan horse releasing small robot agents through an open castle gate at night.

    Case Study9 min read

    Post-Training a 27B Model to Outperform Frontier Red-Teamers by 3x

    By Jake Kang, Vatsal Bajaj, and Ranjan Goel

    Whitney AI took a 27B open-source model and trained it into a red-teamer that outperforms attackers many times its size, 3.1x DeepSeek V4 Flash, with refusal-to-attack down from 81% to 2%.

  • A pixel-art rocket launching through a dark, star-filled sky.

    Research12 min read

    The Art of Evals

    By Nick Mecklenburg

    No public benchmark for medical billing errors existed, so we built one — synthetic data, start to finish.

  • A pixel-art robot lounging at a desk with its feet up, holding a red telephone handset to its ear.

    Case Study7 min read

    Scaling Scam-Call Data Without Scaling Phone Lines

    By Vatsal Bajaj, Jake Kang, and Nick Mecklenburg

    How Whitney AI post-trained a 12B active-parameter generator that writes scam-call transcripts a frontier judge can barely tell from real ones, so Scam AI can build fraud detectors without running thousands of honeypot phone lines.

  • A pixel-art health portal displayed on a CRT monitor, with a targeting reticle over a booking button.

    Case Study7 min read

    Faster Click Prediction for Browser Agents at CloudCruise

    By Jake Kang

    How Whitney AI post-trained a 9B-parameter click-prediction model for CloudCruise's browser-automation builder agent, matching Gemini 3 Flash on accuracy while running 9x faster and 5x cheaper.

  • A pixel-art desk phone in a medical office, framed by a first-aid sign and a doctor portrait.

    Case Study6 min read

    Building Reliable Voice Agents at Harmonize Health

    By Jake Kang and Nick Mecklenburg

    How Whitney AI post-trained a 4B-parameter guardrail model that catches medical-advice violations in Harmonize Health's voice-agent calls before the sentence finishes, matching frontier quality while running 66% faster.

  • A pixel-art mountain with an orange switchback trail climbing to a green summit flag.

    Company3 min read

    Find Your Summit

    By Whitney AI Team

    Everyone can use a frontier model. Almost no one can shape one. Whitney AI is building the IDE for post-training, so the model you improve is a model you own.