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gpt-oss-120bOPEN
gpt-oss-120b (OpenAI): live API pricing, context window and the best open-source alternatives, tracked daily by OpenSourceAI.tech.
Prices update automatically — checked hourly against provider list prices.
Benchmarks & performance
Independent benchmark scores for gpt-oss-120b, measured by Artificial Analysis. Higher is better. Measurement mode: high.
For the same budget, gpt-oss-120b delivers 15 times more capability. Open weights also mean you can self-host it and pay nothing per token.
About this model
gpt-oss-120b is an open-weight AI model by OpenAI. You can download and self-host it for free; the prices below are hosted-API list prices, tracked hourly, for when you prefer convenience over self-hosting.
Frequently asked questions
What is gpt-oss-120b?
gpt-oss-120b is an AI language model from OpenAI. It is open-weight: you can download it and run it on your own hardware, for free. It scores 23.8 on the Artificial Analysis intelligence index.
Is gpt-oss-120b free?
The weights are free and open — you can self-host gpt-oss-120b and pay nothing per token. If you prefer a hosted API, list prices are $0.04 per million input tokens and $0.17 per million output tokens.
What is gpt-oss-120b good at?
Independent benchmarks from Artificial Analysis give it GPQA 78.2%, MMLU-Pro 80.8%, Humanity's Last Exam 18.5%, Long Context Reasoning 50.7%, LiveCodeBench 87.8%, SciCode 38.9%, AIME 2025 93.4%, IFBench 69%, τ²-Bench 65.8%, τ-Bench Banking 12%, Terminal-Bench 26.2%, Terminal-Bench Hard 23.5%. It is particularly used for code generation.
How fast is gpt-oss-120b?
It generates about 247.2 tokens per second, with a median 0.54s delay before the first token. Measured independently by Artificial Analysis.
Can I self-host gpt-oss-120b?
Yes. gpt-oss-120b has open weights, so you can download it and run it on your own GPU or server with tools like Ollama, vLLM or llama.cpp — with no per-token cost.
Open-source alternatives
Depending on your workload, an open-weight model that you can self-host may cut costs dramatically or remove per-token pricing entirely. Our comparison pages put this model side by side with the strongest open-source contenders.