Speed
Output tokens / second
Grok 3 Beta overview
Grok 3 Beta by xAI
Grok 3 Beta is xAI's most advanced model to date, showcasing superior reasoning capabilities and extensive pretraining knowledge.
Grok 3 Beta specs
- Model ID
x-ai/grok-3-beta- Developer
- xAI
- Context window
- 131,000 tokens
- Max output
- 130,000 tokens
- Input
- Text
- Output
- Text
- API
- OpenAI-compatible, base URL
https://api.aimlapi.com/v1
Overview
Grok 3 Beta is xAI’s flagship reasoning model, designed for enterprise-level tasks requiring advanced problem-solving capabilities. It excels in complex reasoning tasks, including mathematics, coding, and domain-specific analytics.
Key Features
- Advanced Reasoning: Utilizes multistep reasoning approaches, self-correcting errors to deliver accurate responses.
- Mathematics and Coding Proficiency: Performs exceptionally well in mathematical problem-solving and code generation tasks.
- Knowledge Retrieval: Accesses and integrates up-to-date information from the internet for informed responses.
Architecture
Grok 3 Beta utilizes Transformer-based architectures optimized for reasoning tasks. This model employs large-scale reinforcement learning for advanced reasoning.
Training Data
Trained on diverse datasets including legal filings, scientific papers, mathematical benchmarks like AIME2025, and synthetic reasoning corpora.
Data Source and Size
Grok 3 models leverage xAI’s Colossus supercluster with over 200,000 GPUs to process terabytes of data efficiently.
Knowledge Cutoff
February 2025; supports static datasets without live data retrieval capabilities.
Use cases
Grok 3 Beta is documented as suited to enterprise use cases such as data extraction, coding, and text summarization.
It is also documented for research and analysis, including multi-source research on complex topics and synthesis of academic papers, news articles, and real-time X discussions into structured reports.
Another documented use case is mathematics and science education, including working through mathematical proofs, scientific problem-solving, and STEM educational assistance.
It is also documented for software development, including code generation, debugging, code review, and explaining complex systems.
Capabilities
- Function calling
- Streaming
- Structured outputs
- Reasoning
Grok 3 Beta benchmarks by 
Artificial Analysis
See how Grok 3 Beta compares in generation speed and latency. Data retrieved Nov 3, 2026.
Benchmark results
Compare 10 models available on AI/ML API across 5 independent benchmarks.
Humanity's Last Exam
Expert-written questions across academic subjects.
GPQA Diamond
Graduate-level science questions written to resist web search.
AA-LCR
Reasoning across long documents of about 100k tokens.
IFBench
Following precise instructions about the shape of the answer.
τ²-Bench Telecom
Customer support agent tasks with tool calls.
Grok 3 Beta API pricing
| Usage | Price | Unit |
|---|---|---|
| Input | $1.25 | 1M tokens |
| Output | $2.5 | 1M tokens |
| Cached input | $0.2 | 1M tokens |
Prices from the AI/ML API price list, checked on Nov 4, 2026.
Grok 3 Beta vs other models: token prices
AI/ML API input and output rates for 5 models, per million tokens.
| Model | Input | Output |
|---|---|---|
 Grok 3 Beta | $1.25 | $2.5 |
| Grok Build 0.1 | $1 | $2 |
| Grok 4.7 | $2 | $6 |
| Grok 4.6 | $2 | $6 |
| Grok 4.5 | $2 | $6 |
How to use the Grok 3 Beta API
View docs
Build with your agent
Give your agent the model details, code and documentation.
Paste it into your coding agent to build the integration.
1Get your API key
Create API keyexport AIMLAPI_KEY="8f2b4c7d9a1e6b3f…"2Make your first request
curl 'https://api.aimlapi.com/v1/chat/completions' \
-H "Authorization: Bearer $AIMLAPI_KEY" \
-H 'Content-Type: application/json' \
-d '{
"model": "x-ai/grok-3-beta",
"messages": [
{
"role": "user",
"content": "Write a haiku about the ocean."
}
]
}'import os
import requests
headers = {
"Authorization": f"Bearer {os.environ['AIMLAPI_KEY']}",
"Content-Type": "application/json",
}
payload = {
"model": "x-ai/grok-3-beta",
"messages": [
{
"role": "user",
"content": "Write a haiku about the ocean."
}
]
}
response = requests.post("https://api.aimlapi.com/v1/chat/completions", headers=headers, json=payload, timeout=120)
response.raise_for_status()
print(response.json())const response = await fetch("https://api.aimlapi.com/v1/chat/completions", {
method: "POST",
headers: {
Authorization: `Bearer ${process.env.AIMLAPI_KEY}`,
"Content-Type": "application/json",
},
body: JSON.stringify({
"model": "x-ai/grok-3-beta",
"messages": [
{
"role": "user",
"content": "Write a haiku about the ocean."
}
]
}),
});
if (!response.ok) throw new Error(`HTTP ${response.status}`);
console.log(await response.json());Models similar to Grok 3 Beta
Related articles
Grok 3 Beta FAQ
What is the context window of Grok 3 Beta?
Grok 3 Beta has a 131,000 tokens context window and can return up to 130,000 tokens.
What inputs and outputs does Grok 3 Beta support?
Grok 3 Beta takes text as input and returns text.
What is the model ID for Grok 3 Beta?
Use x-ai/grok-3-beta as the model id. Requests go to https://api.aimlapi.com/v1/chat/completions.
How much does Grok 3 Beta cost?
Grok 3 Beta costs $1.25 input and $2.5 output per 1M tokens on AI/ML API, billed as you go with no subscription.
Does Grok 3 Beta support streaming?
Yes, Grok 3 Beta can stream responses as they are generated.
Who created Grok 3 Beta?
Grok 3 Beta was built by xAI .
How can I access Grok 3 Beta?
Grok 3 Beta is available via the API endpoint https://api.aimlapi.com/v1/chat/completions.
What key features does Grok 3 Beta offer?
It supports file input, parallel tool calls, streaming, structured output, and tool use.
Can Grok 3 Beta call functions or use external tools?
Yes, it supports function calling, tool use, and parallel tool calls.