Is Grok 3 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?

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

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xAI

x-ai/grok-3

Not Available

Grok 3

Grok 3 is the latest model from xAI. It's their flagship model that excels at enterprise use cases like data extraction, coding, and text summarization. Possesses deep domain knowledge in finance, healthcare, law, and science.

6/10/2025

131,072 tokens

Specifications

Modalities

Input

text

Output

text

Supported Parameters

frequency_penalty

logprobs

max_tokens

presence_penalty

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

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