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Grok-1.5 vs Grok-4
Comprehensive side-by-side LLM comparison
Grok-4 leads with 51.6% higher average benchmark score. Grok-4 supports multimodal inputs. Grok-4 is available on 2 providers. Overall, Grok-4 is the stronger choice for coding tasks.
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xAI
Grok 1.5 was developed by xAI as an advanced language model, designed to provide helpful and accurate information with a focus on reasoning and factual knowledge. Built to serve as a conversational AI with strong analytical capabilities, it represents xAI's early generation of foundation models.
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xAI
Grok 4 represents the fourth generation of xAI's language models, developed to continue advancing the frontier of AI reasoning and knowledge. Built to handle increasingly complex tasks with enhanced reliability, it demonstrates xAI's commitment to pushing AI capabilities forward.
1 year newer
Grok-1.5
xAI
2024-03-28
Grok-4
xAI
2025-07-09
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Performance Metrics
Context window and performance specifications
Average performance across 1 common benchmarks
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Grok-1.5
Average Score:35.9%
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Grok-4
Average Score:87.5%(+51.6%)
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Knowledge Cutoff
Training data recency comparison
Grok-4
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-1.5
0 providers
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Grok-4
2 providers
xAI
Throughput:
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Grok-1.5
Avg Score:35.9%
Providers:0
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Grok-4
Avg Score:87.5%(+51.6%)
Providers:2