Grok 4.1 Fast

Grok 4.1 Fast

SpaceXAI
TabPFN-3.5

TabPFN-3.5

Prior Labs
+
+

Related Products

  • Gemini Enterprise Agent Platform
    999 Ratings
    Visit Website
  • LTX
    182 Ratings
    Visit Website
  • Google AI Studio
    40 Ratings
    Visit Website
  • LM-Kit.NET
    29 Ratings
    Visit Website
  • JetBrains Junie
    12 Ratings
    Visit Website
  • BAND
    3 Ratings
    Visit Website
  • Kitecyber
    81 Ratings
    Visit Website
  • AddSearch
    140 Ratings
    Visit Website
  • BoldTrail
    2,107 Ratings
    Visit Website
  • Concord
    237 Ratings
    Visit Website

About

Grok 4.1 Fast is an xAI model designed to deliver advanced tool-calling capabilities with a massive 2-million-token context window. It excels at complex real-world tasks such as customer support, finance, troubleshooting, and dynamic agent workflows. The model pairs seamlessly with the new Agent Tools API, which enables real-time web search, X search, file retrieval, and secure code execution. This combination gives developers the power to build fully autonomous, production-grade agents that plan, reason, and use tools effectively. Grok 4.1 Fast is trained with long-horizon reinforcement learning, ensuring stable multi-turn accuracy even across extremely long prompts. With its speed, cost-efficiency, and high benchmark scores, it sets a new standard for scalable enterprise-grade AI agents.

About

TabPFN-3.5 is a tabular foundation model built for state-of-the-art predictions on structured data. It supports a wide range of prediction tasks, including churn, fraud, pricing, demand forecasting, risk, and other real-world data science problems, allowing teams to serve multiple use cases with one model. The model works with data as it is, handling missing values, outliers, categorical features, multi-table datasets, free text as a feature, thousands of distinct IDs without encoding, and hundreds of measurements per row. Users can feed in raw data, skip feature engineering and preprocessing, and get production-grade predictions from the first predict call. TabPFN-3.5 performs predictions in a single forward pass and is designed for both accuracy and speed, with fast inference for latency-critical predictive workflows. It supports production-scale datasets of up to one million rows natively and delivers 20x faster inference than previous model versions.

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Audience

This content is ideal for developers, enterprises, and technical teams seeking to build advanced AI agents that require real-time data access, long-context reasoning, and reliable tool-calling capabilities

Audience

Data scientists, machine learning teams, and organizations needing to build fast, production-ready predictions from structured data

Support

Phone Support
24/7 Live Support
Online

Support

Phone Support
24/7 Live Support
Online

API

Offers API

API

Offers API

Screenshots and Videos

Screenshots and Videos

Pricing

No information available.
Free Version
Free Trial

Pricing

No information available.
Free Version
Free Trial

Reviews/Ratings

Overall 5.0 / 5
ease 5.0 / 5
features 5.0 / 5
design 5.0 / 5
support 5.0 / 5

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Pros & Cons from Real Users

Pros

  • Grok 4.1 Fast is one of the most capable agentic AI models available today, combining frontier-level intelligence with blazing speed and exceptional tool-calling performance. Its 2M-token context window enables consistent reasoning over extremely long conversations, multi-turn workflows, and complex planning. Thanks to extensive RL training across diverse simulated environments, the model excels in real-world scenarios such as customer support, finance, research, and autonomous decision-making. Paired with the new Agent Tools API—featuring real-time X search, internet browsing, code execution, file retrieval, and MCP integration—Grok 4.1 Fast can orchestrate multi-step tasks seamlessly and autonomously. Benchmark results reinforce its strengths, outperforming or rivaling leading models across tool calling, long-context reasoning, and multihop search.

Cons

  • Because Grok 4.1 Fast is designed for sophisticated agentic use cases, developers new to tool-calling workflows may face a learning curve when integrating its advanced capabilities. Its reasoning variant is optimized for accuracy rather than instant response time, which may feel slower compared to lightweight chat models. And while pricing is competitive—especially with free access via OpenRouter—the cost of high-volume tool calls may add up for large enterprise workloads once promotional periods end.

Training

Documentation
Webinars
Live Online
In Person

Training

Documentation
Webinars
Live Online
In Person

Company Information

SpaceXAI
Founded: 2023
United States
grok.com

Company Information

Prior Labs
Founded: 2024
Germany
priorlabs.ai/tabpfn-3-5

Alternatives

Alternatives

TabFM

TabFM

Google
MiMo-V2-Flash

MiMo-V2-Flash

Xiaomi Technology
Grok 4.8

Grok 4.8

SpaceXAI
TimesFM-3

TimesFM-3

Google
Grok 4.5

Grok 4.5

SpaceXAI
Seed2.0 Pro

Seed2.0 Pro

ByteDance

Categories

Categories

Integrations

Python
Amazon Web Services (AWS)
C
Clojure
Databricks
F#
Google Cloud Platform
JavaScript
Julia
Laravel
LaunchLemonade
Microsoft Foundry Models
Model Context Protocol (MCP)
NVIDIA DRIVE
OpenRouter
R
Ruby
Snowflake
Visual Basic
Zo Computer

Integrations

Python
Amazon Web Services (AWS)
C
Clojure
Databricks
F#
Google Cloud Platform
JavaScript
Julia
Laravel
LaunchLemonade
Microsoft Foundry Models
Model Context Protocol (MCP)
NVIDIA DRIVE
OpenRouter
R
Ruby
Snowflake
Visual Basic
Zo Computer
Claim Grok 4.1 Fast and update features and information
Claim Grok 4.1 Fast and update features and information
Claim TabPFN-3.5 and update features and information
Claim TabPFN-3.5 and update features and information