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Claude Opus 4 vs GPT OSS 20B
Comprehensive side-by-side LLM comparison
Claude Opus 4 leads with 15.4% higher average benchmark score. Claude Opus 4 offers 65.9K more tokens in context window than GPT OSS 20B. GPT OSS 20B is $89.75 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 is a multimodal language model developed by Anthropic. It achieves strong performance with an average score of 64.6% across 9 benchmarks. It excels particularly in MMMLU (88.8%), TAU-bench Retail (81.4%), GPQA (79.6%). It supports a 328K token context window for handling large documents. The model is available through 4 API providers. As a multimodal model, it can process and understand text, images, and other input formats seamlessly. Released in 2025, it represents Anthropic's latest advancement in AI technology.
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OpenAI
GPT OSS 20B is a language model developed by OpenAI. The model shows competitive results across 7 benchmarks. It excels particularly in MMLU (85.3%), CodeForces (83.9%), GPQA (71.5%). It supports a 262K token context window for handling large documents. The model is available through 4 API providers. It's licensed for commercial use, making it suitable for enterprise applications. Released in 2025, it represents OpenAI's latest advancement in AI technology.
2 months newer
Claude Opus 4
Anthropic
2025-05-22
GPT OSS 20B
OpenAI
2025-08-05
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 20B
Input:$0.05
Output:$0.20($89.75 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 14 common benchmarks
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Claude Opus 4
Average Score:41.6%(+15.4%)
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GPT OSS 20B
Average Score:26.1%
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:41.6%(+15.4%)
Providers:4
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GPT OSS 20B
Avg Score:26.1%
Providers:4