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Claude Opus 4 vs GPT OSS 120B
Comprehensive side-by-side LLM comparison
Claude Opus 4 leads with 6.5% higher average benchmark score. Claude Opus 4 offers 65.9K more tokens in context window than GPT OSS 120B. GPT OSS 120B is $89.46 cheaper per million tokens. Claude Opus 4 supports multimodal inputs. Overall, Claude Opus 4 is the stronger choice for coding tasks.
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Anthropic
Claude Opus 4 was developed as the flagship model in the Claude 4 generation, designed to push the boundaries of AI capability in complex reasoning, analysis, and multi-step problem-solving. Built to handle the most demanding enterprise tasks, it represents Anthropic's highest tier of intelligence and capability.
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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.
2 months newer
Claude Opus 4
Anthropic
2025-05-22
GPT OSS 120B
OpenAI
2025-08-05
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Pricing Comparison
Cost per million tokens (USD)
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Claude Opus 4
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 Opus 4
Average Score:80.5%(+6.5%)
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GPT OSS 120B
Average Score:74.0%
Provider Availability & Performance
Available providers and their performance metrics
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Claude Opus 4
4 providers
Anthropic
Throughput: 100 tok/s
Latency: 0.5ms
Bedrock
Throughput: 120 tok/s
Latency: 0.5ms
Throughput: 42 tok/s
Latency: 0.4ms
ZeroEval
Throughput: 42 tok/s
Latency: 0.4ms
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Claude Opus 4
Avg Score:80.5%(+6.5%)
Providers:4
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GPT OSS 120B
Avg Score:74.0%
Providers:5