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GPT OSS 120B vs GPT OSS 20B
Comprehensive side-by-side LLM comparison
GPT OSS 120B leads with 9.4% higher average benchmark score. Both models have similar pricing. Overall, GPT OSS 120B is the stronger choice for coding tasks.
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OpenAI
GPT OSS 120B is a language model developed by OpenAI. It achieves strong performance with an average score of 61.7% across 7 benchmarks. It excels particularly in MMLU (90.0%), CodeForces (87.4%), GPQA (80.1%). It supports a 262K token context window for handling large documents. The model is available through 5 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.
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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.
Launched on the same date
GPT OSS 120B
OpenAI
2025-08-05
GPT OSS 20B
OpenAI
2025-08-05
Pricing Comparison
Cost per million tokens (USD)
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GPT OSS 120B
Input:$0.09
Output:$0.45
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GPT OSS 20B
Input:$0.05
Output:$0.20($0.29 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 7 common benchmarks
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GPT OSS 120B
Average Score:61.7%(+9.4%)
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GPT OSS 20B
Average Score:52.3%
Provider Availability & Performance
Available providers and their performance metrics
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GPT OSS 120B
5 providers
DeepInfra
Groq
Throughput: 500 tok/s
Latency: 0.5ms
Novita
OpenAI
Throughput: 115 tok/s
Latency: 5.2ms
ZeroEval
Throughput: 500 tok/s
Latency: 0.5ms
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GPT OSS 120B
Avg Score:61.7%(+9.4%)
Providers:5
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GPT OSS 20B
Avg Score:52.3%
Providers:4