Grok 3 Fast vs GPT-4o

Detailed comparison of capabilities, features, and performance.

Feature
Grok 3 Fast
GPT-4o
Model Image
Grok 3 Fast
GPT-4o
AI Lab
xAI
OpenAI
Context Size
131,000 tokens
128,000 tokens
Max Output Size
8,000 tokens
4,096 tokens
Frontier Model
Yes
Yes
Vision Support
No
Yes
Description
Faster Grok 3 with identical quality (131k context). Low latency for time-sensitive tasks.
The Omni model from OpenAI that reasons across audio vision and text

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