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Grok-4 Heavy vs Phi 4
Comprehensive side-by-side LLM comparison
Phi 4 leads with 21.2% higher average benchmark score. Grok-4 Heavy supports multimodal inputs. Overall, Phi 4 is the stronger choice for coding tasks.
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xAI
Grok-4 Heavy is a multimodal language model developed by xAI. It achieves strong performance with an average score of 79.5% across 6 benchmarks. It excels particularly in AIME 2025 (100.0%), HMMT25 (96.7%), GPQA (88.4%). 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.
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Microsoft
Phi 4 is a language model developed by Microsoft. It achieves strong performance with an average score of 66.0% across 13 benchmarks. It excels particularly in MMLU (84.8%), HumanEval+ (82.8%), HumanEval (82.6%). The model is available through 1 API provider. It's licensed for commercial use, making it suitable for enterprise applications. Released in 2024, it represents Microsoft's latest advancement in AI technology.
6 months newer
Phi 4
Microsoft
2024-12-12
Grok-4 Heavy
xAI
2025-07-09
Performance Metrics
Context window and performance specifications
Average performance across 18 common benchmarks
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Grok-4 Heavy
Average Score:26.5%
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Phi 4
Average Score:47.7%(+21.2%)
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Knowledge Cutoff
Training data recency comparison
Phi 4
2024-06-01
Grok-4 Heavy
2024-12-31
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
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Grok-4 Heavy
0 providers
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Phi 4
1 providers
DeepInfra
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Grok-4 Heavy
Avg Score:26.5%
Providers:0
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Phi 4
Avg Score:47.7%(+21.2%)
Providers:1