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GLM-4.5 vs GPT-5 Codex
Comprehensive side-by-side LLM comparison
GPT-5 Codex leads with 10.3% higher average benchmark score. GLM-4.5 is available on 3 providers. Overall, GPT-5 Codex is the stronger choice for coding tasks.
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Zhipu AI
GLM-4.5 was developed by Zhipu AI as an advanced bilingual language model, designed to excel at both Chinese and English language tasks. Built to serve diverse applications across multiple languages, it represents Zhipu AI's commitment to multilingual AI capabilities.
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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 month newer
GLM-4.5
Zhipu AI
2025-07-28
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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GLM-4.5
Average Score:64.2%
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GPT-5 Codex
Average Score:74.5%(+10.3%)
Performance comparison across key benchmark categories
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GLM-4.5
Coding64.2%
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GPT-5 Codex
Coding74.5%(+10.3%)
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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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GLM-4.5
3 providers
DeepInfra
Novita
ZeroEval
Throughput: 85 tok/s
Latency: 0.7ms
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GPT-5 Codex
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GLM-4.5
Avg Score:64.2%
Providers:3
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GPT-5 Codex
Avg Score:74.5%(+10.3%)
Providers:0