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Grok 4.1 Fast vs o4 mini
Comprehensive side-by-side LLM comparison
Grok 4.1 Fast offers 1.7M more tokens in context window than o4 mini. Both models have similar pricing. 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 o4 mini, released by OpenAI in April 2025, is a compact reasoning model from the o4 family that combines multimodal understanding with efficient chain-of-thought processing. It features a 200K token context window and native image understanding, with strong performance on mathematics and coding benchmarks relative to its inference cost. o4 mini targets cost-sensitive applications requiring both visual reasoning and mathematical accuracy.
7 months newer
o4 mini
OpenAI
2025-04-16
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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o4 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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o4 mini
1 providers
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Grok 4.1 Fast
Avg Score:0.0%
Providers:1
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o4 mini
Avg Score:0.0%
Providers:1