FlashLabs has open sourced Chroma 1.0, the world’s first real-time speech-to-speech voice AI model, aiming to break latency, lock-in, and closed pipelines in conversational AI.
FlashLabs has released Chroma 1.0, described as the world’s first fully open source, end-to-end, real-time speech-to-speech AI model with personalised voice cloning, marking a significant shift in how real-time voice AI systems are built and deployed.
Positioned as a foundational open-source model for developers, researchers, and enterprises, Chroma removes one of the largest barriers in human–AI interaction—latency—by operating natively in voice. Unlike conventional systems that rely on fragmented ASR → LLM → TTS pipelines, Chroma enables direct speech-to-speech processing, allowing natural, human-like conversations in real time.
The model achieves end-to-end Time-to-First-Token under 150 milliseconds, with Day-0 SGLang support reducing latency further to approximately 135 milliseconds, optimised for live deployment. Real-time interaction features include natural conversational turn-taking, low-latency emotional and prosodic control, and stable inference without cascading delays.
Chroma also introduces few-second reference voice cloning, enabling highly realistic, personalised voices from minimal audio input. Internal evaluations report a speaker similarity score of 0.817, exceeding the human baseline by 10.96 per cent and delivering best-in-class performance across both open and closed benchmarks.
Built on a compact ~4B-parameter architecture, the model delivers strong reasoning and dialogue capabilities while remaining cost- and latency-efficient, making it suitable for edge devices, call centres, real-time agents, and interactive systems.
“Voice is the most universal interface in the world, yet it has remained closed, fragmented, and delayed,” said Yi Shi, Founder and Chief Research & Engineering at FlashLabs. “With Chroma, we’re open-sourcing real-time voice intelligence so builders, researchers, and companies can create AI systems that truly work at human speed.”
Chroma 1.0 is available immediately.
