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Claude Opus 4.1 vs GPT OSS 120B
Comprehensive side-by-side LLM comparison
Claude Opus 4.1 leads with 7.7% higher average benchmark score. GPT OSS 120B offers 30.1K more tokens in context window than Claude Opus 4.1. GPT OSS 120B is $89.46 cheaper per million tokens. Claude Opus 4.1 supports multimodal inputs. Overall, Claude Opus 4.1 is the stronger choice for coding tasks.
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Anthropic
Claude Opus 4.1 represents an iteration within the Claude 4 Opus line, built to deliver refined performance in complex reasoning and analysis tasks. Developed as part of Anthropic's flagship tier, it incorporates improvements to the foundational capabilities that define the Opus family of models.
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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.
Launched on the same date
Claude Opus 4.1
Anthropic
2025-08-05
GPT OSS 120B
OpenAI
2025-08-05
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Pricing Comparison
Cost per million tokens (USD)
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Claude Opus 4.1
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 4.1
Average Score:81.7%(+7.7%)
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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 4.1
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 4.1
Avg Score:81.7%(+7.7%)
Providers:4
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GPT OSS 120B
Avg Score:74.0%
Providers:5