Grok 3
xAI
At a glance
- Price per 1M tokens (input)
- $3.00
- Price per 1M tokens (output)
- $15.00
- Context
- 131,072 tokens
- Free access
- yes (see below)
Refreshed daily; data verified August 15, 2026. Published August 12, 2026.
Grok 3 by xAI is a general-purpose large language model designed for developers and enterprises that need to integrate AI into their workflows via tool calling, which lets the model invoke external functions and APIs to fetch live data or take actions. It suits tasks like automating customer support, building agents that query databases, or orchestrating multi-step business processes where the model must interact with existing software. What distinguishes xAI's approach is a focus on real-time information access and a direct, no-frills reasoning style, paired with a strong emphasis on functional utility over conversational flourish. This makes it a practical choice for teams that value reliable execution and integration over creative writing or open-ended chat.
Specifications & pricing
| Input (per 1M tokens) | $3.00 |
|---|---|
| Output (per 1M tokens) | $15.00 |
| Cache read (per 1M tokens) | $0.75 |
| Context window | 131,072 tokens |
| Max output | 131,072 tokens |
| Capabilities | tool calling |
LiteLLM community dataset (MIT), verified August 15, 2026. Official xAI pricing.
What Grok 3 would cost on your workload — run it through the cost calculator →
Where to try Grok 3 for free
- xAI offers a free chat — Grok (limited free access). A vendor's free chat may run a different model from the same family — the exact model is not guaranteed.
Frequently asked questions
What is Grok 3 best used for in a business setting?+
It is best for structured, action-oriented tasks where the model needs to call external tools—for example, pulling records from a CRM, sending notifications via an API, or updating a spreadsheet. It also handles conventional text generation like drafting emails or summarizing reports, but its core strength is in agentic workflows where the output must trigger a real-world effect.
How do I get started with Grok 3 for tool calling?+
You start by accessing the model through xAI's developer platform, where you define the functions or endpoints the model may call. You then provide a JSON schema describing each tool, and the model returns a structured request for that tool when needed; your application executes the call and sends the result back for the model to continue. The platform includes documentation and example code for common patterns like REST API integration.
How does Grok 3 differ from other models in the xAI line?+
Within xAI's lineup, Grok 3 is the flagship for advanced reasoning and tool use, whereas sibling models may be lighter or optimized for faster, cheaper responses on simpler tasks. Grok 3 is built to handle more complex multi-step instructions and a wider variety of function signatures, while the others trade depth for speed or lower resource usage. If your task is straightforward text generation, a sibling model might suffice, but for agentic loops, Grok 3 is the intended choice.
What are the main limitations of Grok 3?+
Its primary limitation is that tool calling requires your environment to provide well-defined, secure endpoints; the model cannot execute code or access systems on its own. It may occasionally misinterpret a tool's expected input format, so you need to validate its requests before acting on them. Additionally, it is not optimized for long-form creative writing or nuanced emotional dialogue, and it may produce verbose responses if you do not set explicit output constraints.
Comparisons
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