Open-Weight

in AI Models

Models with openly available weights — freely downloadable, self-hostable, and fine-tunable, with full control over data and operations (licenses vary). A cross-vendor property, e.g. FLUX.2, Llama, and DeepSeek.

Blog Posts

Glossary

FLUX.2 Bild & Video Open-Weight

FLUX.2 is the text-to-image model family from Black Forest Labs. It spans the proprietary Pro and Flex variants plus the open 32-billion-parameter Dev model and the compact Klein series, unifying image generation and image editing in a single model.

Microsoft TRELLIS.2 3D-Modelle Open-Weight

Microsoft TRELLIS.2 is the strongest open image-to-3D model (4B parameters, MIT license). It generates high-resolution assets with native PBR materials in seconds and supports Gaussian Splatting; weights are freely available on Hugging Face.

Chatterbox Speech & Voice Open-Weight

Chatterbox is an open-source text-to-speech model from Resemble AI under the MIT license. In blind tests most listeners preferred it over ElevenLabs; it offers emotion control, voice cloning and low latency.

Fish Audio S2 Speech & Voice Open-Weight

Fish Audio S2 is an open-source text-to-speech model from the Fish Speech family. With inline tags it controls emotion and emphasis at word level, supports more than 80 languages and delivers very low latency.

Foundation-Sec-8B Security-Modelle Open-Weight

Foundation-Sec-8B is Cisco Foundation AIs open, cybersecurity-specialized language model (2025). It extends Llama-3.1-8B via continued pretraining on about 5 billion security tokens and is available under the permissive Apache-2.0 license.

Hunyuan3D 2.0 3D-Modelle Open-Weight

Hunyuan3D 2.0 is Tencents open generative 3D model (January 2025). In two stages it produces high-resolution, textured 3D assets from text or image and supports text-, image-, sketch- and portrait-to-3D. The weights are freely available on Hugging Face.

Kokoro Speech & Voice Open-Weight

Kokoro is an open text-to-speech model (v1.0, January 2025) with just 82M parameters. It produces natural-sounding speech in 8 languages with 54 voices, runs on around 1 GB of VRAM and ships under the Apache-2.0 license.

NVIDIA Canary Speech & Voice Open-Weight

Canary is NVIDIAs open ASR and speech-translation model family (CC-BY-4.0) that tops the Open ASR Leaderboard on English accuracy ahead of OpenAI Whisper and covers 25 European languages.

SauerkrautLM Open-Weight

SauerkrautLM is a German-language LLM family from the German startup VAGOsolutions — fine-tunes based on Llama, Qwen, Mistral, and other open architectures.

Encyclopedia

FLUX.2

FLUX.2 by Black Forest Labs (Freiburg): open-weight image model, variants from 4B to 32B, licenses, hardware needs and how it stacks up in the market.

Martin Rau

News

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