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GPT-4o mini vs GPT-5 Codex
Comprehensive side-by-side LLM comparison
GPT-5 Codex leads with 65.8% higher average benchmark score. GPT-4o mini supports multimodal inputs. Overall, GPT-5 Codex is the stronger choice for coding tasks.
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OpenAI
GPT-4o Mini was created as a smaller, more efficient variant of GPT-4o, designed to bring multimodal capabilities to applications requiring faster response times and lower costs. Built to democratize access to advanced vision and text understanding, it enables developers to build sophisticated applications with reduced resource requirements.
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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 mini
OpenAI
2024-07-18
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 mini
Average Score:8.7%
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GPT-5 Codex
Average Score:74.5%(+65.8%)
Performance comparison across key benchmark categories
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GPT-4o mini
Coding8.7%
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GPT-5 Codex
Coding74.5%(+65.8%)
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Knowledge Cutoff
Training data recency comparison
GPT-4o mini
2023-10-01
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-4o mini
1 providers
Azure
Throughput: 92 tok/s
Latency: 0.52ms
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GPT-5 Codex
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GPT-4o mini
Avg Score:8.7%
Providers:1
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GPT-5 Codex
Avg Score:74.5%(+65.8%)
Providers:0