GPT-OSS 120B · OpenAI
GPT-OSS 120B is the open-weight model from OpenAI. High-quality reasoning in logic, mathematics and code. 131K context tokens.
About GPT-OSS 120B
GPT-OSS 120B is the open-weight model from OpenAI. High-quality reasoning in logic, mathematics and code. 131K context tokens.
Where it shines: OpenAI reasoning · Open-weights · Free without login.
How to use GPT-OSS 120B
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Type or upload
Type what you want in the box above — or upload the file if the tool asks for one.
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Generate
Click the main button. Wait 2-30 seconds depending on the model and input size.
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Download or share
Download the result or share the direct link. No watermark, ready to use.
Frequently asked questions
How much does it cost to use GPT-OSS 120B?
GPT-OSS 120B is one of the free models in the catalog, each use discounts 10 tokens from your pool, but open models like GPT-OSS 120B don’t cost us, so the rate-limit is generous. A free account comes with 500 initial tokens and 25 more every day — you usually don’t get to touch the card.
Is there a usage limit for GPT-OSS 120B?
There is no fixed monthly fee for GPT-OSS 120B on the free account — the actual limit is the rate per minute/hour, not per month. Anonymous are limited by IP; with account you can do much more volume.If you reach 500+25 tokens and need more, a Pro plan at $9/month covers it.
What makes GPT-OSS 120B special?
OpenAI is the lab behind ChatGPT; its models have broad world knowledge and polished outputs, its specific strengths are: openai reasoning, open-weights and free no login.
How fast does GPT-OSS 120B respond?
GPT-OSS 120B has a balanced response time: 5-15 seconds per response — neither the fastest nor the slowest in the catalog. The actual time also depends on the length of the prompt and the load of the datacenter. Models with huge context take longer when you enter very long texts.
How do I use GPT-OSS 120B in ia.gratis?
You can use GPT-OSS 120B from /chat/ by selecting GPT-OSS 120B in the picker, or via the REST API with `model=gpt-oss-120b` in the body of the POST. Quick summary: OpenAI open model. Advanced reasoning. The internal model identifier is `gpt-oss-120b` — useful when integrating via API.