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GPT OSS 120B vs GPT-5
Comprehensive side-by-side LLM comparison
GPT OSS 120B leads with 3.6% higher average benchmark score. GPT-5 offers 265.9K more tokens in context window than GPT OSS 120B. GPT OSS 120B is $10.71 cheaper per million tokens. GPT-5 supports multimodal inputs. GPT OSS 120B is available on 5 providers. Both models have their strengths depending on your specific coding needs.
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OpenAI
GPT-OSS 120B was developed as an open-source model release from OpenAI, designed to provide the research and developer community with access to a capable language model. Built with 120 billion parameters, it enables experimentation, fine-tuning, and deployment in contexts where open-source licensing and transparency are valued.
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OpenAI
GPT-5 represents the next generation of OpenAI's foundational models, developed to advance the frontier of AI capabilities in reasoning, knowledge, and general intelligence. Built to push beyond the limitations of GPT-4, it incorporates architectural and training improvements designed to enhance performance across diverse tasks and domains.
2 days newer
GPT OSS 120B
OpenAI
2025-08-05
GPT-5
OpenAI
2025-08-07
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Pricing Comparison
Cost per million tokens (USD)
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GPT OSS 120B
Input:$0.09
Output:$0.45($10.71 cheaper)
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GPT-5
Input:$1.25
Output:$10.00
Performance Metrics
Context window and performance specifications
Average performance across 4 common benchmarks
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GPT OSS 120B
Average Score:54.8%(+3.6%)
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GPT-5
Average Score:51.2%
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Knowledge Cutoff
Training data recency comparison
GPT-5
2024-09-30
More recent knowledge cutoff means awareness of newer technologies and frameworks
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:54.8%(+3.6%)
Providers:5
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GPT-5
Avg Score:51.2%
Providers:2