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Claude Haiku 4.5 vs GPT OSS 120B
Comprehensive side-by-side LLM comparison
GPT OSS 120B leads with 7.1% higher average benchmark score. Claude Haiku 4.5 offers 137.9K more tokens in context window than GPT OSS 120B. GPT OSS 120B is $5.46 cheaper per million tokens. Claude Haiku 4.5 supports multimodal inputs. GPT OSS 120B is available on 5 providers. Overall, GPT OSS 120B is the stronger choice for coding tasks.
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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 120B was developed as an open-source model release from OpenAI, designed to provide the research and developer community with access to a capable language model. Built with 120 billion parameters, it enables experimentation, fine-tuning, and deployment in contexts where open-source licensing and transparency are valued.
2 months newer
GPT OSS 120B
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 120B
Input:$0.09
Output:$0.45($5.46 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%
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GPT OSS 120B
Average Score:80.1%(+7.1%)
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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 120B
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Claude Haiku 4.5
Avg Score:73.0%
Providers:1
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GPT OSS 120B
Avg Score:80.1%(+7.1%)
Providers:5