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GPT OSS 120B vs GPT-4o
Comprehensive side-by-side LLM comparison
GPT OSS 120B leads with 8.9% higher average benchmark score. GPT OSS 120B offers 117.8K more tokens in context window than GPT-4o. GPT OSS 120B is $11.96 cheaper per million tokens. GPT-4o supports multimodal inputs. GPT OSS 120B is available on 5 providers. Overall, GPT OSS 120B is the stronger choice for coding tasks.
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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
This updated version of GPT-4o was released with refinements to its multimodal capabilities and improved performance across text, vision, and audio tasks. Built to incorporate learnings from the initial GPT-4o deployment, it enhanced reliability and accuracy while maintaining the seamless cross-modal reasoning that defines the GPT-4o family.
12 months newer
GPT-4o
OpenAI
2024-08-06
GPT OSS 120B
OpenAI
2025-08-05
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Pricing Comparison
Cost per million tokens (USD)
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GPT OSS 120B
Input:$0.09
Output:$0.45($11.96 cheaper)
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GPT-4o
Input:$2.50
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:64.2%(+8.9%)
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GPT-4o
Average Score:55.4%
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:64.2%(+8.9%)
Providers:5
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GPT-4o
Avg Score:55.4%
Providers:2