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GPT-5 vs Grok-4 Heavy
Comprehensive side-by-side LLM comparison
GPT-5 leads with 52.0% higher average benchmark score. GPT-5 is available on 2 providers. Overall, GPT-5 is the stronger choice for coding tasks.
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OpenAI
GPT-5 is a multimodal language model developed by OpenAI. It achieves strong performance with an average score of 70.1% across 35 benchmarks. It excels particularly in SWE-Lancer (IC-Diamond subset) (100.0%), COLLIE (99.0%), Tau2 Telecom (96.7%). It supports a 528K token context window for handling large documents. The model is available through 2 API providers. As a multimodal model, it can process and understand text, images, and other input formats seamlessly. Released in 2025, it represents OpenAI's latest advancement in AI technology.
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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.
29 days newer
Grok-4 Heavy
xAI
2025-07-09
GPT-5
OpenAI
2025-08-07
Performance Metrics
Context window and performance specifications
Average performance across 38 common benchmarks
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GPT-5
Average Score:64.5%(+52.0%)
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Grok-4 Heavy
Average Score:12.6%
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Knowledge Cutoff
Training data recency comparison
GPT-5
2024-09-30
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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GPT-5
2 providers
OpenAI
Throughput: 100 tok/s
Latency: 2ms
ZeroEval
Throughput: 100 tok/s
Latency: 2ms
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GPT-5
Avg Score:64.5%(+52.0%)
Providers:2
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Grok-4 Heavy
Avg Score:12.6%
Providers:0