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GPT-4.1 vs GPT-5 Codex
Comprehensive side-by-side LLM comparison
GPT-5 Codex leads with 19.9% higher average benchmark score. GPT-4.1 supports multimodal inputs. Overall, GPT-5 Codex is the stronger choice for coding tasks.
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OpenAI
GPT-4.1 represents an iterative improvement in the GPT-4 series, developed to refine the foundational capabilities established by GPT-4. Built to incorporate learnings and optimizations from the deployment of previous versions, it continues the evolution of OpenAI's flagship model line with enhanced reliability and performance.
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OpenAI
GPT-5 Codex was developed as a specialized variant of GPT-5 optimized for programming and software development tasks. Built to understand and generate code across multiple programming languages, it serves developers with enhanced capabilities for code completion, debugging, translation, and explanation of complex codebases.
5 months newer
GPT-4.1
OpenAI
2025-04-14
GPT-5 Codex
OpenAI
2025-09-15
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Performance Metrics
Context window and performance specifications
Average performance across 1 common benchmarks
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GPT-4.1
Average Score:54.6%
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GPT-5 Codex
Average Score:74.5%(+19.9%)
Performance comparison across key benchmark categories
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GPT-4.1
Coding54.6%
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GPT-5 Codex
Coding74.5%(+19.9%)
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Knowledge Cutoff
Training data recency comparison
GPT-4.1
2024-06-01
GPT-5 Codex
2024-09-30
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-4.1
1 providers
OpenAI
Throughput: 100 tok/s
Latency: 10ms
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GPT-5 Codex
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GPT-4.1
Avg Score:54.6%
Providers:1
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GPT-5 Codex
Avg Score:74.5%(+19.9%)
Providers:0