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Gemini 2.5 Flash vs GPT-5
Comprehensive side-by-side LLM comparison
GPT-5 leads with 32.1% higher average benchmark score. Gemini 2.5 Flash offers 575.4K more tokens in context window than GPT-5. Gemini 2.5 Flash is $149.25 cheaper per million tokens. Overall, GPT-5 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, released by OpenAI on August 7, 2025, is a large language model that combines direct generation and extended reasoning in a single unified system with a built-in routing mechanism. It features a 400K token context window, 128K maximum output tokens, native multimodal support (text, image, audio, video), and demonstrated strong results across coding, mathematics, visual understanding, and health benchmarks at release. GPT-5 targets complex multi-step tasks including advanced coding, mathematical problem solving, and long-context analysis.
1 month newer
Gemini 2.5 Flash
Google DeepMind
2025-06-17
GPT-5
OpenAI
2025-08-07
Pricing Comparison
Cost per million tokens (USD)
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Gemini 2.5 Flash
Input:$0.15
Output:$0.60($149.25 cheaper)
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GPT-5
Input:$30.00
Output:$120.00
Performance Metrics
Context window and performance specifications
Average performance across 5 common benchmarks
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Gemini 2.5 Flash
Average Score:19.1%
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GPT-5
Average Score:51.1%(+32.1%)
Performance comparison across key benchmark categories
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Gemini 2.5 Flash
Science78.3%
Tool Use3.4%
Reasoning12.1%
Agents2.5%
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Knowledge Cutoff
Training data recency comparison
GPT-5
2025-05
More recent knowledge cutoff means awareness of newer technologies and frameworks
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
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Gemini 2.5 Flash
Avg Score:19.1%
Providers:2
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GPT-5
Avg Score:51.1%(+32.1%)
Providers:1