Luma AI

The Startup That Taught AI to Understand Physics

In September 2021, three engineers who had worked on Apple Vision Pro and AR systems walked out of Cupertino with a question nobody else was asking: what if AI didn't just generate pixels, but actually understood the world those pixels depicted? Amit Jain, Alex Yu, and Alberto Taiuti founded Luma AI to answer it, beginning with a deceptively humble tool — photorealistic 3D capture from iPhone footage.

Three years later, that philosophical bet has exploded into one of the most dramatic growth stories in generative AI. When Luma launched Dream Machine in June 2024, the platform signed up one million users in its first four days. By late 2025, over 30 million creators were using it globally to produce cinematic video from nothing but words and still images. The company's flagship models — Ray2 and Ray3 — are now embedded into Adobe Firefly, used by Hollywood VFX studios, and deployed via API at thousands of developer applications worldwide.

World Models, Not Just Pixels

What separates Luma from competitors is an architectural bet on world models: multimodal AI systems trained on video, audio, and language simultaneously. Where many video generators hallucinate physics — objects passing through walls, shadows moving in the wrong direction — Ray3 was engineered to reason about geometry, lighting, and motion before generating a single frame. Ray3, launched in September 2025, became the world's first reasoning video model capable of evaluating its own outputs and iterating in real time. It also introduced studio-grade HDR video in native 16-bit EXR format, a first for any AI system.

• Ray3.14 — 4x faster, 3x cheaper than Ray3, with native 1080p generation
• Ray3 Modify — hybrid AI workflow preserving human actor performance while transforming scenes
• Photon — Luma's dedicated image generation model powering Dream Machine's still-image pipeline

In November 2025, Luma raised $900 million in Series C funding led by HUMAIN (Saudi Arabia's Public Investment Fund), bringing total funding past $1 billion and valuing the company at over $4 billion. The round will fund Project Halo — a 2-gigawatt AI supercluster in Saudi Arabia — and accelerate Luma's expansion into simulation, robotics, and personalized education at a global scale.