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o3
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Grok 4
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o3
OpenAI
Grok 4
xAI
Vendor
OpenAI
xAI
Family
o-series
Grok
Release date
2025-04-16
2025-07-09
Context window
200,000 tokens
256,000 tokens
Parameters
—
—
Modality
text, vision
text
License
proprietary
proprietary
Source
proprietary
proprietary
Description
Reasoning-focused model in the o-series.
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