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GPT-4.1 vs GPT-OSS-20B
Comprehensive side-by-side LLM comparison
GPT-OSS-20B leads with 14.8% higher average benchmark score. GPT-4.1 offers 900.7K more tokens in context window than GPT-OSS-20B. GPT-4.1 is $Infinity cheaper per million tokens. GPT-4.1 supports multimodal inputs. Overall, GPT-OSS-20B is the stronger choice for coding tasks.
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OpenAI
GPT-4.1, released by OpenAI in April 2025, is a large language model from the GPT-4 family optimized for coding, precise instruction following, and long-context tasks. It features a 1M token context window and native image understanding, with improved performance on tool-calling and web development benchmarks compared to GPT-4o. GPT-4.1 targets software development workflows, long-document analysis, and applications requiring accurate, instruction-adherent outputs.
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OpenAI
GPT-OSS-20B is an open-weight large language model with 20 billion parameters from OpenAI's open-source model initiative. It targets deployments requiring a smaller, efficient model that can run on consumer or mid-tier hardware while maintaining strong reasoning and coding capabilities relative to its size.
3 months newer
GPT-4.1
OpenAI
2025-04-14
GPT-OSS-20B
OpenAI
2025-08-05
Pricing Comparison
Cost per million tokens (USD)
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GPT-4.1
Input:$2.00
Output:$8.00($Infinity cheaper)
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GPT-OSS-20B
Input:$Infinity
Output:$Infinity
Performance Metrics
Context window and performance specifications
Average performance across 2 common benchmarks
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GPT-4.1
Average Score:25.9%
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GPT-OSS-20B
Average Score:40.7%(+14.8%)
Performance comparison across key benchmark categories
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GPT-4.1
Science48.1%
Agents3.6%(+2.3%)
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GPT-OSS-20B
Provider Availability & Performance
Available providers and their performance metrics
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GPT-4.1
1 providers
OpenAI
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GPT-OSS-20B
1 providers
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GPT-4.1
Avg Score:25.9%
Providers:1
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GPT-OSS-20B
Avg Score:40.7%(+14.8%)
Providers:1