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GPT-5 Codex vs Grok-4
Comprehensive side-by-side LLM comparison
Grok-4 leads with 45.9% 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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OpenAI
GPT-5 Codex is a language model developed by OpenAI. It achieves strong performance with an average score of 74.5% across 1 benchmarks. Notable strengths include SWE-Bench Verified (74.5%). Released in 2025, it represents OpenAI's latest advancement in AI technology.
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xAI
Grok-4 is a multimodal language model developed by xAI. It achieves strong performance with an average score of 63.1% across 7 benchmarks. It excels particularly in AIME 2025 (91.7%), HMMT25 (90.0%), GPQA (87.5%). It supports a 264K 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 xAI's latest advancement in AI technology.
2 months newer
Grok-4
xAI
2025-07-09
GPT-5 Codex
OpenAI
2025-09-15
Performance Metrics
Context window and performance specifications
Average performance across 8 common benchmarks
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GPT-5 Codex
Average Score:9.3%
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Grok-4
Average Score:55.2%(+45.9%)
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Knowledge Cutoff
Training data recency comparison
GPT-5 Codex
2024-09-30
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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GPT-5 Codex
0 providers
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Grok-4
2 providers
xAI
Throughput:
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GPT-5 Codex
Avg Score:9.3%
Providers:0
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Grok-4
Avg Score:55.2%(+45.9%)
Providers:2