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Gemini 2.5 Flash vs o3
Comprehensive side-by-side LLM comparison
o3 leads with 8.4% higher average benchmark score. Gemini 2.5 Flash offers 814.1K more tokens in context window than o3. Gemini 2.5 Flash is $7.20 cheaper per million tokens. Overall, o3 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
o3 represents the next generation in OpenAI's reasoning model series, developed to advance the capabilities of deliberate, step-by-step problem solving. Built to handle increasingly complex challenges across mathematics, science, and coding, it continues the evolution of reasoning-focused AI with improved analytical depth and accuracy.
1 month newer
o3
OpenAI
2025-04-16
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($7.20 cheaper)
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o3
Input:$2.00
Output:$8.00
Performance Metrics
Context window and performance specifications
Average performance across 7 common benchmarks
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Gemini 2.5 Flash
Average Score:65.1%
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o3
Average Score:73.5%(+8.4%)
Performance comparison across key benchmark categories
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Gemini 2.5 Flash
Coding60.4%
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o3
Coding69.1%(+8.7%)
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Knowledge Cutoff
Training data recency comparison
o3
2024-05-31
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:65.1%
Providers:2
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o3
Avg Score:73.5%(+8.4%)
Providers:1