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GPT-4o vs Grok 4.1 Fast
Comprehensive side-by-side LLM comparison
Grok 4.1 Fast offers 1.9M more tokens in context window than GPT-4o. Grok 4.1 Fast is $6.50 cheaper per million tokens. Both models have their strengths depending on your specific coding needs.
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OpenAI
GPT-4o, released by OpenAI in May 2024, is a multimodal large language model from the GPT-4 family that natively processes text, image, and audio inputs in a single end-to-end model. It features a 128K token context window and demonstrated competitive performance across coding, reasoning, and vision benchmarks at its release. GPT-4o targets general-purpose assistant applications, vision-enabled workflows, and use cases requiring low-latency multimodal understanding.
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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.
1 year newer
GPT-4o
OpenAI
2024-05-13
Grok 4.1 Fast
xAI
2025-11-17
Pricing Comparison
Cost per million tokens (USD)
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GPT-4o
Input:$2.50
Output:$10.00
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Grok 4.1 Fast
Input:$1.00
Output:$5.00($6.50 cheaper)
Performance Metrics
Context window and performance specifications
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Knowledge Cutoff
Training data recency comparison
GPT-4o
2024-04
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
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GPT-4o
1 providers
OpenAI
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Grok 4.1 Fast
1 providers
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GPT-4o
Avg Score:0.0%
Providers:1
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Grok 4.1 Fast
Avg Score:0.0%
Providers:1