+
+
+
+
+
+
+
+
VS
VS
VS
VS
VS
VS
GPT OSS 20B vs GPT-4o mini
Comprehensive side-by-side LLM comparison
GPT-4o mini leads with 14.6% higher average benchmark score. GPT OSS 20B offers 117.8K more tokens in context window than GPT-4o mini. Both models have similar pricing. GPT-4o mini supports multimodal inputs. GPT OSS 20B is available on 4 providers. Overall, GPT-4o mini is the stronger choice for coding tasks.
+
+
+
+
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.
+
+
+
+
OpenAI
GPT-4o mini is a multimodal language model developed by OpenAI. It achieves strong performance with an average score of 63.5% across 9 benchmarks. It excels particularly in HumanEval (87.2%), MGSM (87.0%), MMLU (82.0%). It supports a 144K token context window for handling large documents. The model is available through 1 API provider. As a multimodal model, it can process and understand text, images, and other input formats seamlessly. Released in 2024, it represents OpenAI's latest advancement in AI technology.
1 year newer
GPT-4o mini
OpenAI
2024-07-18
GPT OSS 20B
OpenAI
2025-08-05
Pricing Comparison
Cost per million tokens (USD)
+
+
+
+
GPT OSS 20B
Input:$0.05
Output:$0.20($0.50 cheaper)
+
+
+
+
GPT-4o mini
Input:$0.15
Output:$0.60
Performance Metrics
Context window and performance specifications
Average performance across 14 common benchmarks
+
+
+
+
GPT OSS 20B
Average Score:26.1%
+
+
+
+
GPT-4o mini
Average Score:40.8%(+14.6%)
+
+
+
+
Knowledge Cutoff
Training data recency comparison
GPT-4o mini
2023-10-01
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
+
+
+
+
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
+
+
+
+
+
+
GPT OSS 20B
Avg Score:26.1%
Providers:4
+
+
+
+
GPT-4o mini
Avg Score:40.8%(+14.6%)
Providers:1