+
+
+
+
+
+
+
+
VS
VS
VS
VS
VS
VS
Gemini Diffusion vs GPT-5 Codex
Comprehensive side-by-side LLM comparison
GPT-5 Codex leads with 51.6% higher average benchmark score. Overall, GPT-5 Codex is the stronger choice for coding tasks.
+
+
+
+
Gemini Diffusion was developed as a specialized model for image generation, designed to create high-quality visual content through diffusion-based techniques. Built to complement the text and multimodal capabilities of the Gemini family, it extends Google's AI capabilities into creative visual generation tasks.
+
+
+
+
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.
3 months newer
Gemini Diffusion
2025-05-20
GPT-5 Codex
OpenAI
2025-09-15
+
+
+
+
+
+
+
+
+
+
+
+
Average performance across 1 common benchmarks
+
+
+
+
Gemini Diffusion
Average Score:22.9%
+
+
+
+
GPT-5 Codex
Average Score:74.5%(+51.6%)
Performance comparison across key benchmark categories
+
+
+
+
Gemini Diffusion
Coding22.9%
+
+
+
+
GPT-5 Codex
Coding74.5%(+51.6%)
+
+
+
+
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
+
+
+
+
Gemini Diffusion
0 providers
+
+
+
+
GPT-5 Codex
0 providers
+
+
+
+
Gemini Diffusion
Avg Score:22.9%
Providers:0
+
+
+
+
GPT-5 Codex
Avg Score:74.5%(+51.6%)
Providers:0