Feature: change default xai model from grok-2 to grok-4-1-fast-non-reasoning
## Update
### Default xAI Model Updated to grok-4-1-fast-non-reasoning
The default xAI model used across UChat's AI features has been upgraded from **grok-2** to **grok-4-1-fast-non-reasoning** — delivering significantly faster responses and improved accuracy out of the box.
#### What Changed
| | Previous Default | New Default |
|---|---|---|
| **Model** | `grok-2` | `grok-4-1-fast-non-reasoning` |
| **Generation** | Grok 2 | Grok 4.1 Fast |
| **Mode** | Standard | Non-Reasoning (instant responses) |
| **Context Window** | 131K tokens | 2M tokens |
| **Best For** | General tasks | Speed-critical, high-volume agentic tasks |
#### What's New
- ⚡ **Faster default responses** — `grok-4-1-fast-non-reasoning` skips the reasoning token phase and returns instant, pattern-matched answers
- 📐 **Massive context upgrade** — 2M token context window vs 131K previously, enabling much longer conversations and documents
- 🤖 **Optimised for agentic workflows** — Grok 4.1 Fast is xAI's best tool-calling model, designed for real-world use cases like customer support and automated pipelines
- 🔄 No action required — existing AI Agents, AI Tasks, and AI Intent Recognition will automatically use the new default model unless a specific model has been manually configured
#### Why It Matters
- Users on the default xAI provider will immediately benefit from faster, higher-quality AI responses without any configuration changes
- Grok 4.1 Fast Non-Reasoning is purpose-built for the kind of high-throughput, tool-calling workflows that UChat AI Agents and AI Tasks require
- Pairs with the new **Default AI Provider** setting in AI Hub Settings (released March 2026) for full AI configuration control
> 👉 To manually select a different xAI model, go to: **AI Hub → AI Agents / AI Tasks → Edit → Provider Settings**
> Published: **February 16, 2026**
### Default xAI Model Updated to grok-4-1-fast-non-reasoning
The default xAI model used across UChat's AI features has been upgraded from **grok-2** to **grok-4-1-fast-non-reasoning** — delivering significantly faster responses and improved accuracy out of the box.
#### What Changed
| | Previous Default | New Default |
|---|---|---|
| **Model** | `grok-2` | `grok-4-1-fast-non-reasoning` |
| **Generation** | Grok 2 | Grok 4.1 Fast |
| **Mode** | Standard | Non-Reasoning (instant responses) |
| **Context Window** | 131K tokens | 2M tokens |
| **Best For** | General tasks | Speed-critical, high-volume agentic tasks |
#### What's New
- ⚡ **Faster default responses** — `grok-4-1-fast-non-reasoning` skips the reasoning token phase and returns instant, pattern-matched answers
- 📐 **Massive context upgrade** — 2M token context window vs 131K previously, enabling much longer conversations and documents
- 🤖 **Optimised for agentic workflows** — Grok 4.1 Fast is xAI's best tool-calling model, designed for real-world use cases like customer support and automated pipelines
- 🔄 No action required — existing AI Agents, AI Tasks, and AI Intent Recognition will automatically use the new default model unless a specific model has been manually configured
#### Why It Matters
- Users on the default xAI provider will immediately benefit from faster, higher-quality AI responses without any configuration changes
- Grok 4.1 Fast Non-Reasoning is purpose-built for the kind of high-throughput, tool-calling workflows that UChat AI Agents and AI Tasks require
- Pairs with the new **Default AI Provider** setting in AI Hub Settings (released March 2026) for full AI configuration control
> 👉 To manually select a different xAI model, go to: **AI Hub → AI Agents / AI Tasks → Edit → Provider Settings**
> Published: **February 16, 2026**