ImprovementModels ·
Grok 4.20 Reasoning
Try in the builder
Create an agent or open an existing agent in the builder, then follow the steps below. Model and feature availability may depend on your plan.
What it does
xAI's reasoning model became available inside the builder.
Before this
An addition to the selector. xAI ships reasoning and non-reasoning as two separate models rather than one with a dropdown, so this added the reasoning half of a pair.
Why it matters
Worth a look on agents that have to show their work rather than just produce an answer.
The specs
- Context
- 1,999,000 tokens in and up to 2,000,000 out — by a wide margin the largest budget on the platform.
- Input
- Text and images.
- Actions
- Supported.
- Reasoning
- Always on. xAI ships reasoning and non-reasoning as two separate entries in the selector rather than a dropdown, so you pick the behaviour by picking the model.
- Plans
- Every plan.