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Gemini 1.5 Flash vs Gemini 2.5 Pro Preview 06-05
Comprehensive side-by-side LLM comparison
Gemini 2.5 Pro Preview 06-05 leads with 24.5% higher average benchmark score. Gemini 2.5 Pro Preview 06-05 offers 57.3K more tokens in context window than Gemini 1.5 Flash. Gemini 1.5 Flash is $10.50 cheaper per million tokens. Overall, Gemini 2.5 Pro Preview 06-05 is the stronger choice for coding tasks.
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Gemini 1.5 Flash was created as a fast and efficient multimodal model, designed to provide quick responses while handling text, images, and other modalities. Built for applications requiring low latency and high throughput, it balances capability with speed to serve real-time and high-volume use cases.
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Gemini 2.5 Pro Preview was released as an early access version of Gemini 2.5 Pro, designed to allow developers and enterprises to experiment with next-generation capabilities before general availability. Built to gather feedback and demonstrate upcoming features, it provided a window into the evolution of Google's flagship model.
1 year newer
Gemini 1.5 Flash
2024-05-01
Gemini 2.5 Pro Preview 06-05
2025-06-05
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Pricing Comparison
Cost per million tokens (USD)
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Gemini 1.5 Flash
Input:$0.15
Output:$0.60($10.50 cheaper)
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Gemini 2.5 Pro Preview 06-05
Input:$1.25
Output:$10.00
Performance Metrics
Context window and performance specifications
Average performance across 3 common benchmarks
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Gemini 1.5 Flash
Average Score:54.1%
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Gemini 2.5 Pro Preview 06-05
Average Score:78.5%(+24.5%)
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Knowledge Cutoff
Training data recency comparison
Gemini 1.5 Flash
2023-11-01
Gemini 2.5 Pro Preview 06-05
2025-01-31
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 1.5 Flash
1 providers
Throughput: 150 tok/s
Latency: 0.3ms
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Gemini 2.5 Pro Preview 06-05
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Gemini 1.5 Flash
Avg Score:54.1%
Providers:1
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Gemini 2.5 Pro Preview 06-05
Avg Score:78.5%(+24.5%)
Providers:1