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Claude 3.5 Sonnet vs GPT OSS 20B
Comprehensive side-by-side LLM comparison
Claude 3.5 Sonnet leads with 5.1% higher average benchmark score. Claude 3.5 Sonnet offers 137.9K more tokens in context window than GPT OSS 20B. GPT OSS 20B is $17.75 cheaper per million tokens. Claude 3.5 Sonnet supports multimodal inputs. Overall, Claude 3.5 Sonnet is the stronger choice for coding tasks.
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Anthropic
This upgraded version of Claude 3.5 Sonnet was released with significant improvements in coding and agentic tool use. Built to deliver enhanced performance in software engineering tasks, it brought substantial gains in reasoning and problem-solving while introducing the groundbreaking computer use capability in public beta, allowing it to interact with computer interfaces like a human.
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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.
9 months newer
Claude 3.5 Sonnet
Anthropic
2024-10-22
GPT OSS 20B
OpenAI
2025-08-05
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Pricing Comparison
Cost per million tokens (USD)
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Claude 3.5 Sonnet
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 3 common benchmarks
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Claude 3.5 Sonnet
Average Score:75.6%(+5.1%)
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GPT OSS 20B
Average Score:70.5%
Provider Availability & Performance
Available providers and their performance metrics
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Claude 3.5 Sonnet
3 providers
Anthropic
Throughput: 100 tok/s
Latency: 0.5ms
Bedrock
Throughput: 101 tok/s
Latency: 0.5ms
Throughput: 42 tok/s
Latency: 0.4ms
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Claude 3.5 Sonnet
Avg Score:75.6%(+5.1%)
Providers:3
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GPT OSS 20B
Avg Score:70.5%
Providers:4