OpenAI: gpt-oss-120b (free)
Analysis Summary
OpenAI gpt-oss-120b free is a text-to-text model with a 131K context window, tool use, and function calling. Its measured profile includes strong mathematics and live coding results, while broader intelligence and coding indices remain below the leading commercial engineering models. Free access materially changes its operating economics.
The model is suitable for high-volume code generation, structured SEO production, analysis pipelines, and tool-routed tasks where requests can be validated automatically. It should not replace a premium model for ambiguous strategy, polished client copy, or unsupervised agents because its general capability is more limited. Use it aggressively for routine work, with quality gates and escalation for difficult outputs.
Assessed August 9, 2026
Editorial notes
The free gpt-oss-120b pairs strong mathematical and live coding results with tool use, function calling, and a 131K context. Its general intelligence is below premium models, but zero-cost access is compelling for volume and experimentation.
Rankings consider pricing, capabilities, benchmarks, and real-world applicability and are refreshed as new models launch. Feedback?
DFO Verdict
The free gpt-oss-120b pairs strong mathematical and live coding results with tool use, function calling, and a 131K context. Its general intelligence is below premium models, but zero-cost access is compelling for volume and experimentation.
Benchmark scores
Magenta = intelligence · Ink = technical/agentic · Cyan = content & long-context · Grey = community benchmarks. Data: Artificial Analysis, Hugging Face.
24.1 Intelligence Index·30.4 Coding Index·13.4 Agentic Index·93.4 Math Index
How OpenAI: gpt-oss-120b (free) compares
OpenAI: gpt-oss-120b (free) ranks #153 of 428 AI models we track for overall intelligence, #111 of 201 for coding, #110 of 183 for agentic tasks. Its 131K-token context window is larger than 50% of the models we list. OpenAI: gpt-oss-120b (free) is currently free to use via OpenRouter.
Dark bar = input · light bar = output, scaled to the priciest peer.
1M tokens ≈ 8 full-length novels or ~2,500 pages of business documents in a single request.
Strongest on business fit. The pulled-in value corner is the trade-off, and if the shape matters more than the price, this is your model.
Compare shapes side-by-side →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..
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 #111 of 201 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.