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Gemini 3 Pro vs GPT-5.2 Codex
Comprehensive side-by-side LLM comparison
GPT-5.2 Codex leads with 4.3% higher average benchmark score. Gemini 3 Pro supports multimodal inputs. Gemini 3 Pro is available on 2 providers. Both models have their strengths depending on your specific coding needs.
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Google DeepMind
Gemini 3 Pro, released by Google in November 2025, is a large language model from the Gemini 3 family designed for complex reasoning, broad world knowledge, and multi-step problem solving. It features a 1M token context window, 64K maximum output tokens, and native multimodal input including text, images, audio, and video. Gemini 3 Pro targets research-grade reasoning, advanced data analysis, and applications requiring comprehensive understanding across diverse input formats.
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OpenAI
GPT-5.2 Codex is a coding-specialized variant from the GPT-5.2 family, designed for software engineering workflows including automated code generation, multi-file editing, and agentic development. It builds on GPT-5.2's improved instruction following and long-context capabilities, with optimizations specifically targeting programming tasks and agentic software workflows.
1 month newer
Gemini 3 Pro
Google DeepMind
2025-11-18
GPT-5.2 Codex
OpenAI
2026-01-14
Performance Metrics
Context window and performance specifications
Average performance across 2 common benchmarks
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Gemini 3 Pro
Average Score:51.5%
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GPT-5.2 Codex
Average Score:55.8%(+4.3%)
Performance comparison across key benchmark categories
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Gemini 3 Pro
Coding51.5%
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GPT-5.2 Codex
Coding55.8%(+4.3%)
Provider Availability & Performance
Available providers and their performance metrics
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Gemini 3 Pro
2 providers
Google Cloud Vertex AI
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GPT-5.2 Codex
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Gemini 3 Pro
Avg Score:51.5%
Providers:2
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GPT-5.2 Codex
Avg Score:55.8%(+4.3%)
Providers:0