Author's Description
Grok Beta is xAI's experimental language model with state-of-the-art reasoning capabilities, best for complex and multi-step use cases. It is the successor of [Grok 2](https://x.ai/blog/grok-2) with enhanced context length.
Key Specifications
Supported Parameters
This model supports the following parameters:
Features
This model supports the following features:
Performance Summary
xAI: Grok Beta, a successor to Grok 2 with an enhanced context length of 131072, demonstrates a strong overall performance profile. It consistently performs among the fastest models, ranking in the top tier for speed (80th percentile across benchmarks). However, this speed comes at a premium, as its pricing tends to be at higher levels (12th percentile). A significant strength is its exceptional reliability, achieving a 100% success rate across all benchmarks, indicating minimal technical failures and consistent response delivery. In terms of specific benchmarks, Grok Beta shows robust capabilities. It achieved 98.5% accuracy in General Knowledge and 99.0% in Ethics, placing it in the 59th and 49th percentiles respectively, indicating solid performance in these areas. Its Email Classification performance is particularly noteworthy, achieving a perfect 100.0% accuracy, making it the most accurate model at its price point and among models of comparable speed. In Coding, it scored 90.0% accuracy (72nd percentile). While its duration for these tasks is generally higher, reflecting its speed ranking, its accuracy across diverse categories highlights its state-of-the-art reasoning capabilities, particularly for complex and multi-step use cases.
Model Pricing
Current Pricing
Feature | Price (per 1M tokens) |
---|---|
Prompt | $5 |
Completion | $15 |
Price History
Available Endpoints
Provider | Endpoint Name | Context Length | Pricing (Input) | Pricing (Output) |
---|---|---|---|---|
xAI
|
xAI | x-ai/grok-beta | 131K | $5 / 1M tokens | $15 / 1M tokens |
Benchmark Results
Benchmark | Category | Reasoning | Strategy | Free | Executions | Accuracy | Cost | Duration |
---|
Other Models by x-ai
|
Released | Params | Context |
|
Speed | Ability | Cost |
---|---|---|---|---|---|---|---|
xAI: Grok 4 Fast | Sep 18, 2025 | — | 2M |
Text input
Image input
Text output
|
★ | ★★★★★ | $$$$ |
xAI: Grok Code Fast 1 | Aug 26, 2025 | — | 256K |
Text input
Text output
|
★★ | ★★★★★ | $$$$$ |
xAI: Grok 4 | Jul 09, 2025 | — | 256K |
Text input
Image input
Text output
|
★ | ★★★★★ | $$$$$ |
xAI: Grok 3 Mini | Jun 10, 2025 | ~2.7T | 131K |
Text input
Text output
|
★★ | ★★★★★ | $$$$$ |
xAI: Grok 3 | Jun 10, 2025 | ~2.7T | 131K |
Text input
Text output
|
★★★ | ★★★★ | $$$$$ |
xAI: Grok 3 Mini Beta | Apr 09, 2025 | ~2.7T | 131K |
Text input
Text output
|
★★ | ★★★★★ | $$$$$ |
xAI: Grok 3 Beta | Apr 09, 2025 | ~2.7T | 131K |
Text input
Text output
|
★★★ | ★★★★ | $$$$$ |
xAI: Grok 2 Vision 1212 Unavailable | Dec 14, 2024 | — | 32K |
Text input
Image input
Text output
|
★★★★ | ★★★★ | $$$$$ |
xAI: Grok 2 1212 Unavailable | Dec 14, 2024 | — | 131K |
Text input
Text output
|
★★★★ | ★★★★ | $$$$$ |
xAI: Grok Vision Beta Unavailable | Nov 18, 2024 | — | 8K |
Text input
Image input
Text output
|
★★★★★ | ★★★ | $$$$$ |