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What is Qwen3.5?

Qwen3.5 is an advanced open-weight multimodal AI system built to serve as the foundation for native digital agents capable of reasoning across text, images, and video. The primary release, Qwen3.5-397B-A17B, introduces a hybrid architecture that combines Gated DeltaNet linear attention with a sparse mixture-of-experts design, activating just 17 billion parameters per inference pass while maintaining a total parameter count of 397 billion. This selective activation dramatically improves decoding throughput and cost efficiency without sacrificing benchmark-level performance. Qwen3.5 demonstrates strong results across knowledge, multilingual reasoning, coding, STEM tasks, search agents, visual question answering, document understanding, and spatial intelligence benchmarks. The hosted Qwen3.5-Plus variant offers a default one-million-token context window and integrated tool usage such as web search and code interpretation for adaptive problem-solving. Expanded multilingual support now covers 201 languages and dialects, backed by a 250k vocabulary that enhances encoding and decoding efficiency across global use cases. The model is natively multimodal, using early fusion techniques and large-scale visual-text pretraining to outperform prior Qwen-VL systems in scientific reasoning and video analysis. Infrastructure innovations such as heterogeneous parallel training, FP8 precision pipelines, and disaggregated reinforcement learning frameworks enable near-text baseline throughput even with mixed multimodal inputs. Extensive reinforcement learning across diverse and generalized environments improves long-horizon planning, multi-turn interactions, and tool-augmented workflows. Designed for developers, researchers, and enterprises, Qwen3.5 supports scalable deployment through Alibaba Cloud Model Studio while paving the way toward persistent, economically aware, autonomous AI agents.

What is Jurassic-1?

Jurassic-1 features two distinct model sizes, with the Jumbo variant being the most expansive at 178 billion parameters, showcasing the highest level of intricacy among language models available to developers. Presently, AI21 Studio is undergoing an open beta phase, encouraging users to sign up and start engaging with Jurassic-1 via a user-friendly API and an interactive online platform. At AI21 Labs, we aim to transform the way individuals interact with reading and writing by incorporating machines as cognitive partners, a vision that necessitates collaborative efforts to achieve. Our journey into the realm of language models began during what we call our Mesozoic Era (2017 😉). Building on this initial research, Jurassic-1 represents the first series of models we are now making available for widespread public use. Looking ahead, we are eager to witness the innovative ways in which users will harness these technological advancements in their creative endeavors. Furthermore, we believe that this collaboration between humans and machines will unlock new frontiers in communication and expression.

Media

Media

Integrations Supported

APIFree
Alibaba Cloud Model Studio
BaseRT
Claw Code
Microsoft-Decision-1
Ollama
OpenClaw
Qwen
Qwen3.5-Plus
Tev1
Together AI
ZooClaw

Integrations Supported

Entry Point AI

API Availability

Has API

API Availability

Pricing Information

Free
Open source
Free Version

Pricing Information

Pricing not provided

Supported Platforms

SaaS
Windows
Mac
On-Prem
Linux

Supported Platforms

SaaS
Windows
Mac
On-Prem
Linux

Customer Service / Support

Not specified

Customer Service / Support

Not specified

Training Options

Documentation Hub

Training Options

Documentation Hub

Company Facts

Organization Name

Alibaba

Date Founded

1999

Company Location

China

Company Website

qwen.ai

Company Facts

Organization Name

AI21 Labs

Date Founded

2017

Company Location

Israel

Company Website

www.ai21.com/blog/announcing-ai21-studio-and-jurassic-1

Categories and Features

AI Coding Models

Not specified

AI Models

Not specified

AI Reasoning Models

Not specified

AI Vision Models

Not specified

Foundation Models

Not specified

Large Language Models

Not specified

Multimodal Models

Not specified

Open-Weight AI Models

Not specified

Categories and Features

AI Models

Not specified

Large Language Models

Not specified

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