SEO release batch two

xAI: Grok 4.1 Fast | API capability profile

xAI: Grok 4.1 Fast API capability starts with model ID, modality, parameter surface, and the next key-check step.

Provider

xAI

10 models in catalog

Context

2,000,000

global model route

Input

$0.20

USD / 1M tokens

Output

$0.50

USD / 1M tokens

What this page answers

Grok 4.1 Fast is xAI's best agentic tool calling model that shines in real-world use cases like customer support and deep research. 2M context window. Reasoning can be enabled/disabled using...

xAI · x-ai/grok-4.1-fast
text+image+file->text · global model route
2,000,000 context · $0.20 input

Before connecting

Do not stop at the model name. Before integration, verify base URL, protocol, visible models, parameters, and limits together.

supports include_reasoning
supports logprobs
supports max_tokens
supports reasoning
supports response_format

Next action

The goal is to catch search demand, then move users into model profiles, provider profiles, and key checking.

Check whether the model fits the use case
Then verify key permission and callable models

Continue