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Gemini 2.5 Flash vs o1-preview
Comprehensive side-by-side LLM comparison
Gemini 2.5 Flash leads with 14.8% higher average benchmark score. Gemini 2.5 Flash offers 953.3K more tokens in context window than o1-preview. Gemini 2.5 Flash is $72.20 cheaper per million tokens. Gemini 2.5 Flash supports multimodal inputs. Overall, Gemini 2.5 Flash is the stronger choice for coding tasks.
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Gemini 2.5 Flash represents a continued evolution of Google's efficient multimodal models, designed to deliver enhanced capabilities while maintaining the performance characteristics valued in the Flash series. Built to serve high-throughput applications with improved quality, it advances the balance between speed and intelligence.
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OpenAI
o1-preview was introduced as an early version of OpenAI's reasoning model series, designed to demonstrate the potential of AI models that engage in extended thinking before responding. Built to solve complex problems through deliberate reasoning processes, it represented an initial step toward more thoughtful and analytical AI systems.
8 months newer
o1-preview
OpenAI
2024-09-12
Gemini 2.5 Flash
2025-05-20
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Pricing Comparison
Cost per million tokens (USD)
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Gemini 2.5 Flash
Input:$0.30
Output:$2.50($72.20 cheaper)
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o1-preview
Input:$15.00
Output:$60.00
Performance Metrics
Context window and performance specifications
Average performance across 4 common benchmarks
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Gemini 2.5 Flash
Average Score:64.5%(+14.8%)
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o1-preview
Average Score:49.7%
Performance comparison across key benchmark categories
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Gemini 2.5 Flash
Coding60.4%(+19.1%)
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o1-preview
Coding41.3%
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Knowledge Cutoff
Training data recency comparison
Gemini 2.5 Flash
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 2.5 Flash
2 providers
Throughput: 85 tok/s
Latency: 0.7ms
ZeroEval
Throughput: 85 tok/s
Latency: 0.7ms
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Gemini 2.5 Flash
Avg Score:64.5%(+14.8%)
Providers:2
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o1-preview
Avg Score:49.7%
Providers:2