OpenAI: gpt-oss-120b (free)
Analysis Summary
OpenAI's gpt-oss-120b (free) is a no-cost, large open-weight model with an intelligence index of 33.3, a math score of 93.4, and a livecodebench of 0.878, which is among the strongest coding benchmark scores in this batch. Tool use and function calling are included across a 131K context window. No agentic index is reported.
For businesses, this model is attractive for high-volume text and code tasks where cost is a primary constraint. The strong math and livecodebench scores suggest it handles structured reasoning and code generation well above its intelligence index might suggest. The absence of vision and an agentic index limits its use in multimodal or autonomous agent workflows.
As a free model from OpenAI with verified benchmark data, it is one of the strongest no-cost options available. Teams running large-scale automation, code review, or structured analysis pipelines will find it a compelling choice before committing to paid tiers.
Assessed June 6, 2026
Editorial notes
GPT-OSS-120B (free) from OpenAI offers strong math and livecodebench performance at no cost with tool use and function calling, though no agentic index is available and coding capability is moderate.
Rankings consider pricing, capabilities, benchmarks, and real-world applicability and are refreshed as new models launch. Feedback?
Performance Profile
How OpenAI: gpt-oss-120b (free) compares
OpenAI: gpt-oss-120b (free) ranks #87 of 377 AI models we track for overall intelligence, #95 of 314 for coding. Its 131K-token context window is larger than 59% of the models we list. OpenAI: gpt-oss-120b (free) is currently free to use via OpenRouter.
About OpenAI: gpt-oss-120b (free)
gpt-oss-120b is an open-weight, 117B-parameter Mixture-of-Experts (MoE) language model from OpenAI designed for high-reasoning, agentic, and general-purpose production use cases. It activates 5.1B parameters per forward pass and is optimized..
Capabilities
Performance Indices
Source: Artificial Analysis
Benchmark Scores
Intelligence
Technical
Benchmark data from Artificial Analysis and Hugging Face
How does OpenAI: gpt-oss-120b (free) stack up?
Compare side-by-side with other professional models.
Model Information
| OpenRouter ID |
openai/gpt-oss-120b:free
|
| Provider | openai |
| Release Date | August 5, 2025 |
| Context Length | 131,072 tokens |
| Max Completion | 131,072 tokens |
| Status | Active |
Live Performance
Live endpoint metrics, refreshed every 30 minutes.
Leaderboard Categories
External Resources
Frequently asked questions about OpenAI: gpt-oss-120b (free)
How much does OpenAI: gpt-oss-120b (free) cost?
OpenAI: gpt-oss-120b (free) is currently available for free via OpenRouter.
What is the context window of OpenAI: gpt-oss-120b (free)?
OpenAI: gpt-oss-120b (free) has a context window of 131,072 tokens (131K).
Is OpenAI: gpt-oss-120b (free) good for coding?
On our coding benchmark index, OpenAI: gpt-oss-120b (free) ranks #95 of 314 models, placing it in the broader range of the field for code generation and debugging.
What can OpenAI: gpt-oss-120b (free) do?
OpenAI: gpt-oss-120b (free) supports tool use and function calling.
Who created OpenAI: gpt-oss-120b (free)?
OpenAI: gpt-oss-120b (free) is developed by OpenAI and was released on August 5, 2025.
