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Gemini 2.5 Flash vs GPT OSS 20B
Comprehensive side-by-side LLM comparison
Gemini 2.5 Flash leads with 2.5% higher average benchmark score. Gemini 2.5 Flash offers 852.0K more tokens in context window than GPT OSS 20B. GPT OSS 20B is $2.55 cheaper per million tokens. Gemini 2.5 Flash supports multimodal inputs. GPT OSS 20B is available on 4 providers. Both models have their strengths depending on your specific coding needs.
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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
GPT-OSS 20B was created as a smaller open-source variant, designed to balance capability with accessibility for researchers and developers. Built with 20 billion parameters, it provides a more approachable entry point for those seeking to work with open-source language models while benefiting from OpenAI's architectural insights.
2 months newer
Gemini 2.5 Flash
2025-05-20
GPT OSS 20B
OpenAI
2025-08-05
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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
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GPT OSS 20B
Input:$0.05
Output:$0.20($2.55 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 2 common benchmarks
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Gemini 2.5 Flash
Average Score:46.9%(+2.5%)
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GPT OSS 20B
Average Score:44.4%
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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:46.9%(+2.5%)
Providers:2
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GPT OSS 20B
Avg Score:44.4%
Providers:4