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Claude Opus 4 vs GPT OSS 20B
Comprehensive side-by-side LLM comparison
Claude Opus 4 leads with 17.4% 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 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 20B was created as a smaller open-source variant, designed to balance capability with accessibility for researchers and developers. Built with 20 billion parameters, it provides a more approachable entry point for those seeking to work with open-source language models while benefiting from OpenAI's architectural insights.
2 months newer
Claude Opus 4
Anthropic
2025-05-22
GPT OSS 20B
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 20B
Input:$0.05
Output:$0.20($89.75 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%(+17.4%)
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GPT OSS 20B
Average Score:63.1%
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:80.5%(+17.4%)
Providers:4
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GPT OSS 20B
Avg Score:63.1%
Providers:4