+
+
+
+
+
+
+
+
VS
VS
VS
VS
VS
VS
GPT-5 vs Grok 4.1 Fast
Comprehensive side-by-side LLM comparison
Grok 4.1 Fast offers 1.6M more tokens in context window than GPT-5. Grok 4.1 Fast is $144.00 cheaper per million tokens. Both models have their strengths depending on your specific coding needs.
+
+
+
+
OpenAI
GPT-5, released by OpenAI on August 7, 2025, is a large language model that combines direct generation and extended reasoning in a single unified system with a built-in routing mechanism. It features a 400K token context window, 128K maximum output tokens, native multimodal support (text, image, audio, video), and demonstrated strong results across coding, mathematics, visual understanding, and health benchmarks at release. GPT-5 targets complex multi-step tasks including advanced coding, mathematical problem solving, and long-context analysis.
+
+
+
+
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.
3 months newer
GPT-5
OpenAI
2025-08-07
Grok 4.1 Fast
xAI
2025-11-17
Pricing Comparison
Cost per million tokens (USD)
+
+
+
+
GPT-5
Input:$30.00
Output:$120.00
+
+
+
+
Grok 4.1 Fast
Input:$1.00
Output:$5.00($144.00 cheaper)
Performance Metrics
Context window and performance specifications
+
+
+
+
Knowledge Cutoff
Training data recency comparison
GPT-5
2025-05
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
+
+
+
+
GPT-5
1 providers
OpenAI
+
+
+
+
Grok 4.1 Fast
1 providers
+
+
+
+
GPT-5
Avg Score:0.0%
Providers:1
+
+
+
+
Grok 4.1 Fast
Avg Score:0.0%
Providers:1