Model Comparison
GPT OSS 120B High vs GPT OSS 20B High
Both models are evenly matched across the benchmarks. GPT OSS 120B High and GPT OSS 20B High cost the same.
Performance Benchmarks
Comparative analysis across standard metrics
GPT OSS 120B High outperforms in 1 benchmarks (GPQA), while GPT OSS 20B High is better at 1 benchmark (AIME 2025).
Both models are evenly matched across the benchmarks.
Arena Performance
Human preference votes
Pricing Analysis
Price comparison per million tokens
For input processing, GPT OSS 120B High ($0.10/1M tokens) costs the same as GPT OSS 20B High ($0.10/1M tokens).
For output processing, GPT OSS 120B High ($0.50/1M tokens) costs the same as GPT OSS 20B High ($0.50/1M tokens).
In conclusion, GPT OSS 120B High and GPT OSS 20B High cost the same.*
* Using a 3:1 ratio of input to output tokens
Model Size
Parameter count comparison
GPT OSS 120B High has 95.9B more parameters than GPT OSS 20B High, making it 458.9% larger.
Context Window
Maximum input and output token capacity
Both models have the same input context window of 131,072 tokens. Both models can generate responses up to 131,072 tokens.
License
Usage and distribution terms
Both models are licensed under Apache 2.0.
Both models share the same licensing terms, providing consistent usage rights.
Apache 2.0
Open weights
Apache 2.0
Open weights
Release Timeline
When each model was launched
Both models were released on 2025-08-05.
They likely represent similar generations of model development.
Aug 5, 2025
9 months ago
Aug 5, 2025
9 months ago
Knowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
GPT OSS 120B High is available from OpenAI, Fireworks. GPT OSS 20B High is available from OpenAI.
GPT OSS 120B High
GPT OSS 20B High
Outputs Comparison
Key Takeaways
Detailed Comparison
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FAQ
Common questions about GPT OSS 120B High vs GPT OSS 20B High.