Grok 4.3
xAI
At a glance
- Price per 1M tokens (input)
- $1.25
- Price per 1M tokens (output)
- $2.50
- Context
- 1,000,000 tokens
- Free access
- yes (see below)
Refreshed daily; data verified August 15, 2026. Published August 12, 2026.
Grok 4.3 by xAI is a multimodal reasoning model designed for business users who need to analyze visual data, automate workflows, and solve complex problems with transparent logic. It excels at tasks like extracting insights from charts or diagrams, orchestrating multi-step processes through tool calling (the ability to invoke external functions or APIs), and producing step-by-step reasoning that is auditable. The vendor distinguishes itself by focusing on rigorous logical decomposition, making the model particularly useful for regulated industries where explainability matters. This model suits teams that require a dependable assistant for data interpretation, process automation, and decision support without sacrificing clarity in how conclusions are reached.
Specifications & pricing
| Input (per 1M tokens) | $1.25 |
|---|---|
| Output (per 1M tokens) | $2.50 |
| Cache read (per 1M tokens) | $0.20 |
| Context window | 1,000,000 tokens |
| Max output | 1,000,000 tokens |
| Capabilities | images, tool calling, reasoning |
LiteLLM community dataset (MIT), verified August 15, 2026. Official xAI pricing.
What Grok 4.3 would cost on your workload — run it through the cost calculator →
Where to try Grok 4.3 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 4.3 best used for in a business context?+
Grok 4.3 is ideal for tasks that combine visual understanding with structured problem-solving. For example, you can feed it a screenshot of a dashboard or a scanned contract, and it will extract key data points, identify anomalies, and then use tool calling to fetch additional records or update a spreadsheet. It also shines in scenario analysis where you need a clear, step-by-step rationale for a recommendation, such as evaluating supply chain risks or drafting a technical troubleshooting guide.
How do I get started with Grok 4.3?+
You can access Grok 4.3 through the xAI API or via the integrated chat interface in the xAI platform. For developers, the API supports standard REST calls, and you can enable tool calling by defining functions in your request. For non-technical users, the chat interface allows you to upload images and ask questions directly. Start with a small pilot project, like automating a monthly report or analyzing a set of product images, to evaluate performance against your existing workflows.
How does Grok 4.3 differ from other models in the xAI line?+
Within the xAI family, Grok 4.3 is positioned as the most balanced model, offering advanced image understanding and robust tool calling while maintaining strong reasoning depth. Sibling models may focus more on speed or raw text generation, but Grok 4.3 prioritizes accuracy in multi-step tasks and explainability. If you need a model that can both interpret visual inputs and execute complex workflows, Grok 4.3 is the recommended choice. For simpler text-only tasks, a lighter model might be more cost-effective.
What are the practical limitations of Grok 4.3 I should know?+
Grok 4.3 may struggle with highly ambiguous images, such as low-resolution photos or heavily stylized graphics, where it might misread details. Its reasoning, while transparent, can become verbose for very simple queries, so you may need to set response length parameters. Also, tool calling requires careful function definitions to avoid errors, and the model does not have built-in access to real-time data unless you provide it via tools. For highly specialized domains, you might need to fine-tune or augment it with external knowledge bases.
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