Is Grok 3 available on FastMetal?

Not at the moment. Grok 4.5, 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.

How does Grok 3 rank?

#144 on the public arena's Japanese board (ELO 1,310). Ranks move as the leaderboard is updated.

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x-ai/grok-3

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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

#144 Text (Japanese)

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

Frequently asked questions

Is Grok 3 available on FastMetal?: Not at the moment. Grok 4.5, 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.
How does Grok 3 rank?: #144 on the public arena's Japanese board (ELO 1,310). Ranks move as the leaderboard is updated.