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What is Step 3.5 Flash?

Step 3.5 Flash represents a state-of-the-art open-source foundational language model crafted for sophisticated reasoning and agent-like functionality, prioritizing efficiency; it employs a sparse Mixture of Experts (MoE) framework that activates roughly 11 billion of its nearly 196 billion parameters for each token, which ensures both dense intelligence and rapid responsiveness. The architecture includes a 3-way Multi-Token Prediction (MTP-3) system, enabling the generation of hundreds of tokens per second and supporting intricate multi-step reasoning and task execution, while efficiently handling extensive contexts through a hybrid sliding window attention technique that reduces computational stress on large datasets or codebases. Its remarkable capabilities in reasoning, coding, and agentic tasks often rival or exceed those of much larger proprietary models, further enhanced by a scalable reinforcement learning mechanism that promotes ongoing self-improvement. This innovative design not only highlights Step 3.5 Flash's effectiveness but also positions it as a transformative force in the domain of AI language models, indicating its vast potential across a plethora of applications. As such, it stands as a testament to the advancements in AI technology, paving the way for future developments.

What is MiniMax-M2.1?

MiniMax-M2.1 is a high-performance, open-source agentic language model designed for modern development and automation needs. It was created to challenge the idea that advanced AI agents must remain proprietary. The model is optimized for software engineering, tool usage, and long-horizon reasoning tasks. MiniMax-M2.1 performs strongly in multilingual coding and cross-platform development scenarios. It supports building autonomous agents capable of executing complex, multi-step workflows. Developers can deploy the model locally, ensuring full control over data and execution. The architecture emphasizes robustness, consistency, and instruction accuracy. MiniMax-M2.1 demonstrates competitive results across industry-standard coding and agent benchmarks. It generalizes well across different agent frameworks and inference engines. The model is suitable for full-stack application development, automation, and AI-assisted engineering. Open weights allow experimentation, fine-tuning, and research. MiniMax-M2.1 provides a powerful foundation for the next generation of intelligent agents.

Media

Media

Integrations Supported

BLACKBOX AI
Claude Code
Cline
Factory
Fireworks AI
GitHub
Hugging Face
Kilo Code
ModelScope
Ollama
OpenClaw
Roo Code
Shiori
arXiv

Integrations Supported

BLACKBOX AI
Claude Code
Cline
Factory
Fireworks AI
GitHub
Hugging Face
Kilo Code
ModelScope
Ollama
OpenClaw
Roo Code
Shiori
arXiv

API Availability

Has API

API Availability

Has API

Pricing Information

Free
Free Trial Offered?
Free Version

Pricing Information

Free
Free Trial Offered?
Free Version

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

StepFun

Date Founded

2023

Company Location

China

Company Website

static.stepfun.com/blog/step-3.5-flash/

Company Facts

Organization Name

MiniMax

Date Founded

2021

Company Location

Singapore

Company Website

www.minimax.io

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