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Gemini 2.5 Flash vs GPT OSS 20B
Comprehensive side-by-side LLM comparison
Gemini 2.5 Flash leads with 26.8% 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. Overall, Gemini 2.5 Flash is the stronger choice for coding tasks.
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Gemini 2.5 Flash is a multimodal language model developed by Google. It achieves strong performance with an average score of 62.5% across 14 benchmarks. It excels particularly in Global-MMLU-Lite (88.4%), AIME 2024 (88.0%), FACTS Grounding (85.3%). With a 1.1M token context window, it can handle extensive documents and complex multi-turn conversations. The model is available through 2 API providers. As a multimodal model, it can process and understand text, images, and other input formats seamlessly. Released in 2025, it represents Google's latest advancement in AI technology.
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OpenAI
GPT OSS 20B is a language model developed by OpenAI. The model shows competitive results across 7 benchmarks. It excels particularly in MMLU (85.3%), CodeForces (83.9%), GPQA (71.5%). It supports a 262K token context window for handling large documents. The model is available through 4 API providers. It's licensed for commercial use, making it suitable for enterprise applications. Released in 2025, it represents OpenAI's latest advancement in AI technology.
2 months newer
Gemini 2.5 Flash
2025-05-20
GPT OSS 20B
OpenAI
2025-08-05
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 19 common benchmarks
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Gemini 2.5 Flash
Average Score:46.0%(+26.8%)
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GPT OSS 20B
Average Score:19.3%
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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:46.0%(+26.8%)
Providers:2
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GPT OSS 20B
Avg Score:19.3%
Providers:4