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Claude Sonnet 4 vs GPT OSS 20B
Comprehensive side-by-side LLM comparison
Claude Sonnet 4 leads with 14.8% higher average benchmark score. Claude Sonnet 4 offers 65.9K more tokens in context window than GPT OSS 20B. GPT OSS 20B is $17.75 cheaper per million tokens. Claude Sonnet 4 supports multimodal inputs. Overall, Claude Sonnet 4 is the stronger choice for coding tasks.
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Anthropic
Claude Sonnet 4 was created as the balanced offering in the Claude 4 family, designed to provide strong intelligence with practical speed and cost efficiency. Built to serve as a versatile workhorse for diverse applications, it balances advanced capabilities with operational considerations for everyday enterprise and consumer use.
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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 Sonnet 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 Sonnet 4
Input:$3.00
Output:$15.00
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GPT OSS 20B
Input:$0.05
Output:$0.20($17.75 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 2 common benchmarks
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Claude Sonnet 4
Average Score:78.0%(+14.8%)
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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 Sonnet 4
4 providers
Anthropic
Throughput: 42 tok/s
Latency: 0.4ms
Bedrock
Throughput: 101 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 Sonnet 4
Avg Score:78.0%(+14.8%)
Providers:4
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GPT OSS 20B
Avg Score:63.1%
Providers:4