+
+
+
+
+
+
+
+
VS
VS
VS
VS
VS
VS
Grok 4 Fast vs Phi 4 Reasoning
Comprehensive side-by-side LLM comparison
Grok 4 Fast leads with 25.1% 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.
+
+
+
+
Microsoft
Phi-4 Reasoning was developed to incorporate extended analytical thinking into the Phi-4 architecture, designed to spend more time on complex problem-solving. Built to combine compact model efficiency with reasoning depth, it represents Microsoft's exploration of thoughtful small models.
4 months newer
Phi 4 Reasoning
Microsoft
2025-04-30
Grok 4 Fast
xAI
2025-08-28
+
+
+
+
+
+
+
+
+
+
+
+
Performance Metrics
Context window and performance specifications
Average performance across 3 common benchmarks
+
+
+
+
Grok 4 Fast
Average Score:85.9%(+25.1%)
+
+
+
+
Phi 4 Reasoning
Average Score:60.8%
+
+
+
+
Knowledge Cutoff
Training data recency comparison
Phi 4 Reasoning
2025-03-01
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
+
+
+
+
Grok 4 Fast
1 providers
xAI
Throughput: 90 tok/s
+
+
+
+
Phi 4 Reasoning
0 providers
+
+
+
+
Grok 4 Fast
Avg Score:85.9%(+25.1%)
Providers:1
+
+
+
+
Phi 4 Reasoning
Avg Score:60.8%
Providers:0