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GPT OSS 20B vs Phi 4
Comprehensive side-by-side LLM comparison
Phi 4 leads with 27.4% higher average benchmark score. GPT OSS 20B offers 230.1K more tokens in context window than Phi 4. Both models have similar pricing. GPT OSS 20B is available on 4 providers. Overall, Phi 4 is the stronger choice for coding tasks.
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OpenAI
GPT OSS 20B is a language model developed by OpenAI. The model shows competitive results across 7 benchmarks. It excels particularly in MMLU (85.3%), CodeForces (83.9%), GPQA (71.5%). It supports a 262K token context window for handling large documents. The model is available through 4 API providers. It's licensed for commercial use, making it suitable for enterprise applications. Released in 2025, it represents OpenAI's latest advancement in AI technology.
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Microsoft
Phi 4 is a language model developed by Microsoft. It achieves strong performance with an average score of 66.0% across 13 benchmarks. It excels particularly in MMLU (84.8%), HumanEval+ (82.8%), HumanEval (82.6%). The model is available through 1 API provider. It's licensed for commercial use, making it suitable for enterprise applications. Released in 2024, it represents Microsoft's latest advancement in AI technology.
7 months newer
Phi 4
Microsoft
2024-12-12
GPT OSS 20B
OpenAI
2025-08-05
Pricing Comparison
Cost per million tokens (USD)
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GPT OSS 20B
Input:$0.05
Output:$0.20
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Phi 4
Input:$0.07
Output:$0.14($0.04 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 18 common benchmarks
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GPT OSS 20B
Average Score:20.3%
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Phi 4
Average Score:47.7%(+27.4%)
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Knowledge Cutoff
Training data recency comparison
Phi 4
2024-06-01
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
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GPT OSS 20B
4 providers
Groq
Throughput: 1000 tok/s
Latency: 0.38ms
Novita
OpenAI
Throughput: 115 tok/s
Latency: 5.2ms
ZeroEval
Throughput: 1000 tok/s
Latency: 0.38ms
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GPT OSS 20B
Avg Score:20.3%
Providers:4
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Phi 4
Avg Score:47.7%(+27.4%)
Providers:1