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GPT-4o vs GPT-5 Codex
Comprehensive side-by-side LLM comparison
GPT-5 Codex leads with 41.3% higher average benchmark score. GPT-4o supports multimodal inputs. GPT-4o is available on 2 providers. Overall, GPT-5 Codex is the stronger choice for coding tasks.
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OpenAI
This updated version of GPT-4o was released with refinements to its multimodal capabilities and improved performance across text, vision, and audio tasks. Built to incorporate learnings from the initial GPT-4o deployment, it enhanced reliability and accuracy while maintaining the seamless cross-modal reasoning that defines the GPT-4o family.
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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.
1 year newer
GPT-4o
OpenAI
2024-08-06
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-4o
Average Score:33.2%
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GPT-5 Codex
Average Score:74.5%(+41.3%)
Performance comparison across key benchmark categories
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GPT-4o
Coding33.2%
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GPT-5 Codex
Coding74.5%(+41.3%)
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Knowledge Cutoff
Training data recency comparison
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-4o
2 providers
Azure
Throughput: 99 tok/s
Latency: 0.53ms
OpenAI
Throughput: 132 tok/s
Latency: 0.5ms
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GPT-4o
Avg Score:33.2%
Providers:2
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GPT-5 Codex
Avg Score:74.5%(+41.3%)
Providers:0