Joël Hainzl

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Joël Hainzl, black and white headshot, smiling in clear round glasses and a black crew neck sweater

Highlights

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  1. @JoelHainzl

    Palo Alto, 2026

    Fellows working at long white desks under chandeliers in the main hall of the AI hacker house in Palo Alto, 2026
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  2. Coauthored a Fermisense study: 9B model beat Claude Fable 5 at 1/68th the cost

    Chart of cost per 1,000 listings against task score: a fine tuned Qwen3.5 9B model with GRPO reaches 87% at $0.50, ahead of Claude Fable 5, Gemini 3.1 Pro, GPT 5.5 and GPT 5.5 pro at 70 to 76% for $19 to $172

  3. Won a VW Jetta in Warsaw at Project ElevenLabs

    Joël Hainzl, center in a black turtleneck, with his team holding a drawn car board and the VW Jetta key on stage at the Project Europe hackathon with ElevenLabs in Warsaw

  4. CDTM, Class of Spring 2025

    CDTM Class of Spring 2025 group photo, around thirty students in navy CDTM shirts in front of a wooden chapel

  5. Entrepreneur in Residence at Tacto, backed by Sequoia Capital and Index Ventures

    Joël Hainzl, right, taking a selfie with a Tacto colleague in the Tacto office in Munich

  6. Won the MindsDB x OpenBB FinTech AI Hackathon in San Francisco

    Joël Hainzl, right, with three fellow winners in front of the MindsDB stage wall at the MindsDB hackathon in San Francisco

  7. Ranked 1st of 2,961 at WU Vienna, finished a year early, 3x Dean's List

    Joël Hainzl with arms crossed in a white t shirt in the atrium of the WU Vienna Library and Learning Center

  8. Worked on set at Big Sky, London's biggest photo studio: Dua Lipa, Max Verstappen, Naomi Campbell

    Joël Hainzl with long hair standing in a white cyclorama studio at Big Sky Studios in London beneath a large softbox and an HMI lamp
    Dua Lipa Future Nostalgia album cover: Dua Lipa in a pink shirt and white gloves at the wheel of a car, a full moon behind herPerfect magazine cover: Kate Moss in a black turtleneck, black and white portrait by Anthony Seklaoui under the pink Perfect masthead
    Studio 01 at Big Sky Studios London, a large white infinity cove under a lighting rig

  9. Fashion weeks: Milan and London

  10. Modelled for Vogue Italia

    Joël Hainzl with long hair in a camel coat, studio portrait by Evgenia Rieger published on PhotoVogue, Vogue Italia, with the Vogue watermarkJoël Hainzl with long hair in a fur trapper hat and a long camel coat, portrait by Evgenia Rieger published on PhotoVogue, Vogue Italia, with the Vogue watermark

  11. Selected work

    • Runway finale at an evening outdoor fashion show, a long line of models in leather and shearling coats walking toward the camera
    • Dancer in a black leotard balancing on one leg on a brick wall at dusk, the London skyline with the Shard and Tower Bridge behind her
    • Young man in aviator glasses and an orange hoodie against an orange wall, head turned over his shoulder, studio portrait
    • Models walking a runway at a fashion show, the lead model in a long printed gown with teased hair
    • Black and white studio portrait of a young man in a pinstripe shirt, finger resting on his nose, looking off to the side
    • Two women in street style looks on a city plaza, one in gold with cat eye sunglasses, the other in a pink wig and a long blue coat
    • Model in wide floral trousers, a brown half blazer and a floral blouse, hands on hips, lit against a blue wall
    • Blonde model in narrow black sunglasses and sheer tulle sleeves, lit in pink and yellow against a dark background
    • Woman in a long white skirt and dark top standing on a mound at sunset, palm trees silhouetted against a golden sky

  12. Financed photography school at Fotoakademie Graz as bike courier

    Joël Hainzl's orange road bike with the velofood.at delivery box on the rack, against a green wall in Graz

  13. Started studying music theory at university at age 10 and won music competitions in four separate categories: violin, piano, harp and hackbrett

    Joël Hainzl as a boy playing violin in front of a grand piano, his hackbrett and its hammers in the foreground, newspaper photo