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 a Pro model: it costs 10 tokens per use (~$0.05 real cost for us). You need a Pro plan ($9/month → 15,000 tokens) or a one-shot pack. If you already have tokens in the free account, you can also spend them directly.
How many uses of GPT-OSS 120B are included in the Pro plan?
Pro ($9/month) gives you 15,000 recurring tokens. At 10 tokens per use of GPT-OSS 120B, that's ~1,500 full uses per cycle. If you run out, one-shot packs (5,000 / 25,000 / 80,000 tokens) add to the balance without expiring before one year.
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.