GPT-OSS-120B
by OpenAI
+
+
+
+
About
GPT-OSS-120B, released by OpenAI in August 2025, is an open-weight large language model with 120 billion parameters distributed under the Apache 2.0 license. It represents OpenAI's entry into the open-source model space, enabling developers to self-host and fine-tune a GPT-5-generation-class model. GPT-OSS-120B targets research applications, on-premises deployments, and custom fine-tuning workflows requiring a large open-weight base model.
+
+
+
+
Pricing Range
Input (per 1M)$0.00 -$0.00
Output (per 1M)$0.00 -$0.00
Providers1
+
+
+
+
Timeline
ReleasedAug 1, 2025
+
+
+
+
License & Family
License
Apache 2.0
Performance Overview
Performance metrics and category breakdown
Overall Performance
2 benchmarks
Average Score
39.9%
Best Score
78.3%
High Performers (80%+)
0Performance Metrics
Max Context Window
132.1KTop Categories
Science
78.3%
Agents
1.6%
+
+
+
+
All Benchmark Results for GPT-OSS-120B
Complete list of benchmark scores with detailed information
| GPQA Diamond | Science | 78.30 | 78.3% | Unverified | |
| BrowseComp | Agents | 1.60 | 1.6% | Unverified |