Grok 4.20
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 September 2, 2026. Published September 2, 2026.
Grok 4.20 is aimed at enterprises that need to combine visual analysis with programmable reasoning. It excels at tasks such as interpreting product photographs, extracting structured data from scanned forms, and orchestrating external services through tool calling (the ability to invoke functions or APIs during a response). The model’s step‑by‑step reasoning layer lets developers break complex problems into manageable stages, improving transparency and debugging. xAI’s approach integrates image perception directly into the language core rather than treating it as a separate module, which reduces latency and simplifies system architecture.
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 September 2, 2026. Official xAI pricing.
What Grok 4.20 would cost on your workload — run it through the cost calculator →
Where to try Grok 4.20 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 kinds of business problems can Grok 4.20 handle effectively?+
It is well suited for workflows that require visual inspection combined with data extraction, such as quality control imaging, invoice processing, and interactive chatbots that can call external APIs to retrieve real‑time information.
How do we start using the model in an existing application?+
Begin by accessing the provider’s API endpoint, send a request that includes the image data and a description of the desired function, and handle the returned function call payload to integrate with your services. The documentation provides sample code for common languages.
In what ways does Grok 4.20 differ from earlier Grok releases?+
The current version merges visual and textual reasoning into a single transformer, adds a dedicated step‑by‑step reasoning module, and expands tool calling to support arbitrary JSON‑based function signatures, whereas prior releases treated images as a separate post‑processor and offered limited function support.
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