Is Grok 3 Mini available on FastMetal?

Not at the moment. Grok 4.6, from the same lab, is available on the FastMetal API today.

What is the context window of Grok 3 Mini?

131,072 tokens, shared between the prompt and the response.

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xAI

x-ai/grok-3-mini

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Grok 3 Mini

A lightweight model that thinks before responding. Fast, smart, and great for logic-based tasks that do not require deep domain knowledge. The raw thinking traces are accessible.

6/10/2025

131,072 tokens

Specifications

Modalities

Input

text

Output

text

Supported Parameters

include_reasoning

logprobs

max_tokens

reasoning

response_format

seed

stop

structured_outputs

temperature

tool_choice

tools

top_logprobs

top_p

Data policy

Prompt retention: Unknown — we could not confirm
Training: Unknown — not declared

"Unknown" does not mean "safe". It means we could not confirm it.

Whether a provider trains on prompts is a declared value from our terms with them. Retention is determined from the upstream listing for every host this model can reach. Neither is guessed.

Frequently asked questions

Is Grok 3 Mini available on FastMetal?: Not at the moment. Grok 4.6, from the same lab, is available on the FastMetal API today.
What is the context window of Grok 3 Mini?: 131,072 tokens, shared between the prompt and the response.

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