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Gemini 2.5 Pro Preview 06-05 vs GPT OSS 20B
Comprehensive side-by-side LLM comparison
Gemini 2.5 Pro Preview 06-05 leads with 9.6% higher average benchmark score. Gemini 2.5 Pro Preview 06-05 offers 852.0K more tokens in context window than GPT OSS 20B. GPT OSS 20B is $11.00 cheaper per million tokens. Gemini 2.5 Pro Preview 06-05 supports multimodal inputs. GPT OSS 20B is available on 4 providers. Overall, Gemini 2.5 Pro Preview 06-05 is the stronger choice for coding tasks.
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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.
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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 Pro Preview 06-05
2025-06-05
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 Pro Preview 06-05
Input:$1.25
Output:$10.00
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GPT OSS 20B
Input:$0.05
Output:$0.20($11.00 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 2 common benchmarks
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Gemini 2.5 Pro Preview 06-05
Average Score:54.0%(+9.6%)
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GPT OSS 20B
Average Score:44.4%
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Knowledge Cutoff
Training data recency comparison
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 2.5 Pro Preview 06-05
1 providers
Throughput: 85 tok/s
Latency: 0.7ms
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GPT OSS 20B
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Gemini 2.5 Pro Preview 06-05
Avg Score:54.0%(+9.6%)
Providers:1
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GPT OSS 20B
Avg Score:44.4%
Providers:4