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Gemini 2.5 Flash vs GPT-5 Pro
Comprehensive side-by-side LLM comparison
GPT-5 Pro leads with 19.6% higher average benchmark score. Gemini 2.5 Flash is available on 2 providers. Overall, GPT-5 Pro 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 Pro is an extended-reasoning variant from the GPT-5 family that applies more compute per response for deeper, more thorough answers on complex problems. It features the same 400K token context window and multimodal capabilities as GPT-5, with additional reasoning depth suited to research-grade analysis, advanced coding, and tasks requiring comprehensive, accurate outputs.
1 month newer
Gemini 2.5 Flash
Google DeepMind
2025-06-17
GPT-5 Pro
OpenAI
2025-08-07
Performance Metrics
Context window and performance specifications
Average performance across 1 common benchmarks
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Gemini 2.5 Flash
Average Score:12.1%
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GPT-5 Pro
Average Score:31.6%(+19.6%)
Performance comparison across key benchmark categories
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Gemini 2.5 Flash
Reasoning12.1%
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GPT-5 Pro
Reasoning31.6%(+19.6%)
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 Pro
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Gemini 2.5 Flash
Avg Score:12.1%
Providers:2
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GPT-5 Pro
Avg Score:31.6%(+19.6%)
Providers:0