OpenAI: gpt-oss-120b (free) API Pricing FREE
by openai · 131K context window ·
Explore OpenAI's free gpt-oss-120b API, a powerful LLM option for machine learning engineers. This open-source model boasts a 131,072 token context window and is offered with completely free pricing: $0.00 per 1M input tokens and $0.00 per 1M output tokens. Reduce your LLM costs without sacrificing performance. For example, even processing 100 million tokens monthly would still cost $0.00, making it ideal for experimentation and development. Compare gpt-oss-120b against other LLM APIs and see how this free offering from OpenAI can benefit your projects. Perfect for developers looking for a cost-effective solution.
Monthly Cost Examples
Assuming 50% input / 50% output token split
| Usage | Monthly cost |
|---|---|
| 100K tokens/month | $0.00 |
| 1M tokens/month | $0.00 |
| 10M tokens/month | $0.00 |
| 100M tokens/month | $0.00 |
Compare with other models
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Only use OpenAI: gpt-oss-120b (free) when your quality requirements demand it.