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Description

Grok 4.1 Thinking is the reasoning-enabled version of Grok designed to handle complex, high-stakes prompts with deliberate analysis. Unlike fast-response models, it visibly works through problems using structured reasoning before producing an answer. This approach improves accuracy, reduces misinterpretation, and strengthens logical consistency across longer conversations. Grok 4.1 Thinking leads public benchmarks in general capability and human preference testing. It delivers advanced performance in emotional intelligence by understanding context, tone, and interpersonal nuance. The model is especially effective for tasks that require judgment, explanation, or synthesis of multiple ideas. Its reasoning depth makes it well-suited for analytical writing, strategy discussions, and technical problem-solving. Grok 4.1 Thinking also demonstrates strong creative reasoning without sacrificing coherence. The model maintains alignment and reliability even in ambiguous scenarios. Overall, it sets a new standard for transparent and thoughtful AI reasoning.

Description

Step 3.5 Flash is a cutting-edge open-source foundational language model designed for advanced reasoning and agent-like capabilities, optimized for efficiency; it utilizes a sparse Mixture of Experts (MoE) architecture that activates only approximately 11 billion of its nearly 196 billion parameters per token, ensuring high-density intelligence and quick responsiveness. The model features a 3-way Multi-Token Prediction (MTP-3) mechanism that allows it to generate hundreds of tokens per second, facilitating complex multi-step reasoning and task execution while efficiently managing long contexts through a hybrid sliding window attention method that minimizes computational demands across extensive datasets or codebases. Its performance on reasoning, coding, and agentic tasks is formidable, often matching or surpassing that of much larger proprietary models, and it incorporates a scalable reinforcement learning system that enables continuous self-enhancement. Moreover, this innovative approach positions Step 3.5 Flash as a significant player in the field of AI language models, showcasing its potential to revolutionize various applications.

API Access

Has API No 

API Access

Has API Yes 

Screenshots View All

Screenshots View All

Integrations

C# Yes 
C++ Yes 
CSS Yes 
F# Yes 
GitHub No 
Grok 4.1 Yes 
Grok 4.20 Yes 
HTML Yes 
Java Yes 
Kotlin Yes 
Microsoft Foundry Yes 
OpenRouter Yes 
PHP Yes 
R Yes 
Ruby Yes 
SQL Yes 
Scala Yes 
SuperGrok Yes 
TypeScript Yes 
arXiv No 

Integrations

C# No 
C++ No 
CSS No 
F# No 
GitHub Yes 
Grok 4.1 No 
Grok 4.20 No 
HTML No 
Java No 
Kotlin No 
Microsoft Foundry No 
OpenRouter No 
PHP No 
R No 
Ruby No 
SQL No 
Scala No 
SuperGrok No 
TypeScript No 
arXiv Yes 

Pricing Details

No price information available.
Free Trial No 
Free Version No 

Pricing Details

Free
Free Trial No 
Free Version Yes 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App Yes 
iPad App Yes 
Android App Yes 
Windows No 
Mac No 
Linux No 
Chromebook No 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Vendor Details

Company Name

SpaceXAI

Founded

2023

Country

United States

Website

grok.com

Vendor Details

Company Name

StepFun

Founded

2023

Country

China

Website

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

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