OpenAI model
gpt-oss-120b API cost calculator
gpt-oss-120b costs $0.15 per 1M input tokens and $0.60 per 1M output tokens on the OpenAI API, with a 131K-token context window. A typical request (2K input, 500 output tokens) costs $0.0006 — about $18.00/month at 1,000 requests per day. Use the calculator below to model your exact workload.
Find me a cheaper modelWhat real workloads cost on gpt-oss-120b
| Workload | Tokens (in / out) | Per request | Per 1K requests |
|---|---|---|---|
| Chatbot message | 500 / 300 | $0.0003 | $0.26 |
| RAG query with context | 4,000 / 500 | $0.0009 | $0.90 |
| Document summarization | 20,000 / 1,000 | $0.0036 | $3.60 |
| Agent coding session | 100,000 / 5,000 | $0.02 | $18.00 |
gpt-oss-120b vs other OpenAI models
| Model | Input /1M | Output /1M | Context |
|---|---|---|---|
| gpt-oss-120b | $0.15 | $0.60 | 131K |
| GPT-6.1 Terra Pro | $1 | $5 | 1.1M |
| GPT-6.1 Terra | $1 | $5 | 1.1M |
| GPT-6.1 Sol Pro | $2 | $10 | 1.1M |
| GPT-6.1 Sol | $2 | $10 | 1.1M |
Frequently asked questions
How much does gpt-oss-120b cost per 1M tokens?
According to current pricing data, gpt-oss-120b costs $0.15 per 1M input tokens and $0.60 per 1M output tokens. Processing 1M tokens each way costs $0.75.
What does a typical API request to gpt-oss-120b cost?
A typical request with 2,000 input tokens and 500 output tokens costs $0.0006. At 1,000 requests per day that is $0.60 daily, or about $18.00 per month.
What is gpt-oss-120b's context window?
gpt-oss-120b supports a 131K-token context window (131,072 tokens).
Does gpt-oss-120b support prompt caching?
Yes. Cached input tokens cost $0.07 per 1M — a 50% discount versus the standard input rate, which matters for agents and chat apps that resend the same system prompt.
What is a cheaper alternative to gpt-oss-120b?
gpt-oss-20b from OpenAI is currently the cheapest comparable option at $0.02 per 1M input tokens versus $0.15 for gpt-oss-120b — roughly 8x cheaper on input.
Prices may differ from OpenAI's official pricing page for batch, tiered, or fine-tuned usage. Compare all current prices on the live model pricing dashboard, see gpt-oss-120b vs gpt-oss-20b pricing, or run gpt-oss-120b head-to-head against other models in the side-by-side comparison playground.
Pricing data via the OpenRouter models API.