+
+
+
+
+
+
+
+
VS
VS
VS
VS
VS
VS
Grok 4 Fast vs Kimi K2-Instruct-0905
Comprehensive side-by-side LLM comparison
Grok 4 Fast leads with 35.5% higher average benchmark score. Grok 4 Fast supports multimodal inputs. Overall, Grok 4 Fast is the stronger choice for coding tasks.
+
+
+
+
xAI
Grok 4 Fast is a multimodal language model developed by xAI. It achieves strong performance with an average score of 73.0% across 7 benchmarks. It excels particularly in SimpleQA (95.0%), HMMT 2025 (93.3%), AIME 2025 (92.0%). With a 2.0M token context window, it can handle extensive documents and complex multi-turn conversations. The model is available through 1 API provider. As a multimodal model, it can process and understand text, images, and other input formats seamlessly. Released in 2025, it represents xAI's latest advancement in AI technology.
+
+
+
+
Moonshot AI
Kimi K2 Instruct-0905 represents a specific release iteration of the K2 Instruct model, developed to incorporate refinements and improvements. Built to provide enhanced instruction-following based on deployment feedback, it continues the evolution of Moonshot's instruction-tuned offerings.
8 days newer
Grok 4 Fast
xAI
2025-08-28
Kimi K2-Instruct-0905
Moonshot AI
2025-09-05
+
+
+
+
+
+
+
+
+
+
+
+
Performance Metrics
Context window and performance specifications
Average performance across 6 common benchmarks
+
+
+
+
Grok 4 Fast
Average Score:77.7%(+35.5%)
+
+
+
+
Kimi K2-Instruct-0905
Average Score:42.1%
Provider Availability & Performance
Available providers and their performance metrics
+
+
+
+
Grok 4 Fast
1 providers
xAI
Throughput: 90 tok/s
+
+
+
+
Kimi K2-Instruct-0905
0 providers
+
+
+
+
Grok 4 Fast
Avg Score:77.7%(+35.5%)
Providers:1
+
+
+
+
Kimi K2-Instruct-0905
Avg Score:42.1%
Providers:0