openai
OpenAI: gpt-oss-120b API Pricing
OpenAI: gpt-oss-120b costs $0.037 per 1M input tokens and $0.170 per 1M output tokens. Context window: 131K. Prices verified 2026-08-23 Β· source
Input / 1M tokens
$0.037
Output / 1M tokens
$0.170
Context window
131K
Max output
131K
What would OpenAI: gpt-oss-120b cost you per month?
| Workload | Requests/mo | Avg tokens (in/out) | Est. monthly cost |
|---|---|---|---|
| Light chatbot | 10,000 | 800 / 400 | $0.98 |
| Coding agent | 5,000 | 8,000 / 2,000 | $3.18 |
| RAG pipeline | 30,000 | 4,000 / 500 | $6.99 |
| Doc summarizer | 2,000 | 20,000 / 1,000 | $1.82 |
Estimates use list prices without prompt caching. Caching can cut input cost by up to 90% on repeated context.
About OpenAI: gpt-oss-120b
gpt-oss-120b is an open-weight, 117B-parameter Mixture-of-Experts (MoE) language model from OpenAI designed for high-reasoning, agentic, and general-purpose production use cases. It activates 5.1B parameters per forward pass and is optimized...
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