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Claude 3 Opus vs GPT OSS 120B
Comprehensive side-by-side LLM comparison
GPT OSS 120B leads with 16.5% higher average benchmark score. Claude 3 Opus offers 137.9K more tokens in context window than GPT OSS 120B. GPT OSS 120B is $89.46 cheaper per million tokens. Claude 3 Opus 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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Anthropic
Claude 3 Opus was developed as the most capable model in the Claude 3 family, designed to set new industry benchmarks across a wide range of cognitive tasks. Built to handle complex analysis and extended tasks requiring deep reasoning, it balanced frontier intelligence with careful safety considerations, representing the flagship tier of the Claude 3 generation.
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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.
1 year newer
Claude 3 Opus
Anthropic
2024-02-29
GPT OSS 120B
OpenAI
2025-08-05
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Pricing Comparison
Cost per million tokens (USD)
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Claude 3 Opus
Input:$15.00
Output:$75.00
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GPT OSS 120B
Input:$0.09
Output:$0.45($89.46 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 2 common benchmarks
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Claude 3 Opus
Average Score:68.6%
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GPT OSS 120B
Average Score:85.0%(+16.5%)
Provider Availability & Performance
Available providers and their performance metrics
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Claude 3 Opus
3 providers
Anthropic
Throughput: 100 tok/s
Latency: 0.5ms
Bedrock
Throughput: 120 tok/s
Latency: 0.5ms
Throughput: 42 tok/s
Latency: 0.4ms
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Claude 3 Opus
Avg Score:68.6%
Providers:3
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GPT OSS 120B
Avg Score:85.0%(+16.5%)
Providers:5