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OpenAI: gpt-oss-120b API Pricing
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...
How much does OpenAI: gpt-oss-120b cost for a real workload?
At 10M input + 2M output tokens per month, OpenAI: gpt-oss-120b costs about $2.7 ($1.5 input + $1.2 output). Try your own volumes in the cost calculator.
What are cheaper alternatives to OpenAI: gpt-oss-120b?
- OpenAI: GPT-5.4 Nano (batch) — $0.1 in / $0.625 out per 1M
- Tencent: Hunyuan A13B Instruct — $0.14 in / $0.57 out per 1M
- OpenAI: GPT-5.6 Luna Pro (batch) — $0.1 in / $0.6 out per 1M
- OpenAI: GPT-5.6 Luna (batch) — $0.1 in / $0.6 out per 1M
- DeepSeek: DeepSeek V3.2 — $0.28 in / $0.42 out per 1M
- DeepSeek: DeepSeek V3.2 Exp — $0.27 in / $0.41 out per 1M
Compare OpenAI: gpt-oss-120b with other models
OpenAI: gpt-oss-120b vs OpenAI: gpt-oss-20bOpenAI: gpt-oss-120b vs OpenAI: gpt-oss-20b (batch)OpenAI: gpt-oss-120b vs OpenAI: gpt-oss-120b (batch)OpenAI: gpt-oss-120b vs OpenAI: GPT-5 Nano (batch)OpenAI: gpt-oss-120b vs OpenAI: GPT-4.1 Nano (batch)OpenAI: gpt-oss-120b vs OpenAI: GPT-6 Luna Pro (batch)
Frequently asked questions
How much does OpenAI: gpt-oss-120b cost?
OpenAI: gpt-oss-120b costs $0.15 per 1M input tokens and $0.6 per 1M output tokens (list price, snapshot October 21, 2026). At 10M input + 2M output tokens per month that is about $2.7.
What is the context window of OpenAI: gpt-oss-120b?
OpenAI: gpt-oss-120b has a context window of 131,072 tokens and can return up to 65,536 output tokens per response.
What are cheaper alternatives to OpenAI: gpt-oss-120b?
Cheaper models include OpenAI: GPT-5.4 Nano (batch) ($0.1 in / $0.625 out), Tencent: Hunyuan A13B Instruct ($0.14 in / $0.57 out), OpenAI: GPT-5.6 Luna Pro (batch) ($0.1 in / $0.6 out). See the full list on this page.
Is OpenAI: gpt-oss-120b free to use?
No. OpenAI: gpt-oss-120b is a paid model at $0.15 input / $0.6 output per 1M tokens. 20 free models are listed on the free models page.
Provider: openai · Model ID: openai/gpt-oss-120b · Modality: text->text · Price snapshot October 21, 2026, refreshed daily. How we collect prices