Home › Providers › openai › OpenAI: gpt-oss-120b

OpenAI: gpt-oss-120b API Pricing

OpenAI: gpt-oss-120b is an API model from openai. It costs $0.15 per 1M input tokens and $0.6 per 1M output tokens, with cached input at $0.075. Its context window is 131,072 tokens with up to 65,536 output tokens. A workload of 10M input + 2M output tokens costs about $2.7 per month.

Input

$0.15

per 1M tokens

Output

$0.6

per 1M tokens

Cached input

$0.075

per 1M tokens

Context window

131K

131,072 tokens

Blended (80/20)

$0.24

per 1M tokens

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

Where to run OpenAI: gpt-oss-120b

AI/ML API: one API key for 400+ models, including most models tracked here · Novita AI: pay-as-you-go APIs for open models (DeepSeek, Qwen, Llama and more) plus GPU cloud. Prices there follow each platform's own catalog and can differ from the list prices tracked here.

Run it on AI/ML API →Run it on Novita AI →

Disclosure: links to these platforms may be affiliate links — if you sign up or buy through them, LLMPrices may earn a commission at no extra cost to you.

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 22, 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. 21 free models are listed on the free models page.

Provider: openai · Model ID: openai/gpt-oss-120b · Modality: text->text · Price snapshot October 22, 2026, refreshed daily. How we collect prices