OpenAI: gpt-oss-120b (free)
Analysis Summary
OpenAI: gpt-oss-120b (free) sits in the Specialist tier on our leaderboard, ranked #134 of 525 published models on overall intelligence. At $0.000 input and $0.000 output per 1M tokens, it is among the most expensive on the market. It offers a standard large context window and supports tool use, function calling, and reasoning.
Editorial notes
OpenAI's gpt-oss-120b (free) offers impressive coding and math benchmarks at no cost, with strong reasoning scores that make it one of the best free-tier options currently available from a major provider.
Assessed April 23, 2026
Rankings consider pricing, capabilities, benchmarks, and real-world applicability and are refreshed as new models launch. Feedback?
Performance Profile
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?
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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.
