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Grok 4.1 Fast vs o3 mini
Comprehensive side-by-side LLM comparison
Grok 4.1 Fast offers 1.7M more tokens in context window than o3 mini. Both models have similar pricing. Grok 4.1 Fast supports multimodal inputs. Both models have their strengths depending on your specific coding needs.
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xAI
Grok 4.1 Fast, released by xAI in November 2025, is a fast-response variant from the Grok 4 family featuring a 2M token context window designed for high-throughput applications. It omits thinking tokens for immediate responses, reducing latency while maintaining strong output quality. Grok 4.1 Fast targets production APIs, real-time assistants, and cost-sensitive applications requiring long-context understanding at high volume.
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OpenAI
OpenAI o3 mini, released by OpenAI in January 2025, is a compact reasoning model from the o3 family designed for efficient, cost-effective STEM problem-solving. It features a 200K token context window and adjustable chain-of-thought effort settings, allowing developers to trade reasoning depth for speed. o3 mini targets science, mathematics, and coding applications where lower inference cost and faster response times are a priority.
9 months newer
o3 mini
OpenAI
2025-01-31
Grok 4.1 Fast
xAI
2025-11-17
Pricing Comparison
Cost per million tokens (USD)
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Grok 4.1 Fast
Input:$1.00
Output:$5.00
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o3 mini
Input:$1.10
Output:$4.40($0.50 cheaper)
Performance Metrics
Context window and performance specifications
Provider Availability & Performance
Available providers and their performance metrics
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Grok 4.1 Fast
1 providers
xAI
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o3 mini
1 providers
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Grok 4.1 Fast
Avg Score:0.0%
Providers:1
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o3 mini
Avg Score:0.0%
Providers:1