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Gemini 2.5 Flash vs GPT-5.2 Codex
Comprehensive side-by-side LLM comparison
GPT-5.2 Codex leads with 50.1% higher average benchmark score. Gemini 2.5 Flash supports multimodal inputs. Gemini 2.5 Flash is available on 2 providers. Overall, GPT-5.2 Codex is the stronger choice for coding tasks.
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Google DeepMind
Gemini 2.5 Flash, released by Google in June 2025, is a large language model from the Gemini 2.5 family optimized for high-throughput, cost-efficient deployments with multimodal reasoning. It features a 1M token context window, hybrid thinking control, and native support for text, image, video, and audio input. Gemini 2.5 Flash targets latency-sensitive applications, document analysis, and high-volume API workloads that benefit from combined reasoning and generation in a single model.
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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.
7 months newer
Gemini 2.5 Flash
Google DeepMind
2025-06-17
GPT-5.2 Codex
OpenAI
2026-01-14
Performance Metrics
Context window and performance specifications
Average performance across 1 common benchmarks
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Gemini 2.5 Flash
Average Score:16.4%
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GPT-5.2 Codex
Average Score:66.5%(+50.1%)
Performance comparison across key benchmark categories
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Gemini 2.5 Flash
Coding16.4%
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GPT-5.2 Codex
Coding66.5%(+50.1%)
Provider Availability & Performance
Available providers and their performance metrics
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Gemini 2.5 Flash
2 providers
Google Cloud Vertex AI
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GPT-5.2 Codex
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Gemini 2.5 Flash
Avg Score:16.4%
Providers:2
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GPT-5.2 Codex
Avg Score:66.5%(+50.1%)
Providers:0