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Claude Haiku 4.5 vs GPT OSS 20B
Comprehensive side-by-side LLM comparison
Claude Haiku 4.5 leads with 1.5% higher average benchmark score. Claude Haiku 4.5 offers 137.9K more tokens in context window than GPT OSS 20B. GPT OSS 20B is $5.75 cheaper per million tokens. Claude Haiku 4.5 supports multimodal inputs. GPT OSS 20B is available on 4 providers. Both models have their strengths depending on your specific coding needs.
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Anthropic
Claude Haiku 4.5 continues Anthropic's tradition of fast, efficient models in the fourth generation Claude family. Designed to maintain the hallmark speed and cost-effectiveness of the Haiku line while incorporating advancements from the Claude 4 series, it serves applications requiring rapid processing and quick turnaround times.
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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
GPT OSS 20B
OpenAI
2025-08-05
Claude Haiku 4.5
Anthropic
2025-10-15
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Pricing Comparison
Cost per million tokens (USD)
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Claude Haiku 4.5
Input:$1.00
Output:$5.00
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GPT OSS 20B
Input:$0.05
Output:$0.20($5.75 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 1 common benchmarks
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Claude Haiku 4.5
Average Score:73.0%(+1.5%)
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GPT OSS 20B
Average Score:71.5%
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Knowledge Cutoff
Training data recency comparison
Claude Haiku 4.5
2025-02-01
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
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Claude Haiku 4.5
1 providers
Anthropic
Throughput: 100 tok/s
Latency: 0.3ms
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GPT OSS 20B
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Claude Haiku 4.5
Avg Score:73.0%(+1.5%)
Providers:1
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GPT OSS 20B
Avg Score:71.5%
Providers:4