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GPT-5 Codex vs GPT-5 mini
Comprehensive side-by-side LLM comparison
GPT-5 mini leads with 37.6% higher average benchmark score. GPT-5 mini supports multimodal inputs. GPT-5 mini is available on 2 providers. Overall, GPT-5 mini 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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OpenAI
GPT-5 mini is a multimodal language model developed by OpenAI. It achieves strong performance with an average score of 60.0% across 5 benchmarks. It excels particularly in AIME 2025 (91.1%), HMMT 2025 (87.8%), GPQA (82.3%). 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.
1 month newer
GPT-5 mini
OpenAI
2025-08-07
GPT-5 Codex
OpenAI
2025-09-15
Performance Metrics
Context window and performance specifications
Average performance across 6 common benchmarks
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GPT-5 Codex
Average Score:12.4%
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GPT-5 mini
Average Score:50.0%(+37.6%)
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Knowledge Cutoff
Training data recency comparison
GPT-5 mini
2024-05-30
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-5 Codex
0 providers
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GPT-5 mini
2 providers
OpenAI
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GPT-5 Codex
Avg Score:12.4%
Providers:0
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GPT-5 mini
Avg Score:50.0%(+37.6%)
Providers:2