GPT OSS 120B API
OpenAI
GPT OSS 120B
About GPT OSS 120B
GPT OSS 120B is a large language model developed by OpenAI. It's particularly well-suited for tackling complex, multi-step reasoning problems, and handling large contexts of up to 128K tokens. Its 128K-token context window means you can pass in entire documents, codebases, or conversation histories without losing context. Developers choose GPT OSS 120B when they need reliable, production-quality AI inference through a simple API — and on Qubax, it's available at a fraction of the cost of traditional providers.
In the broader AI landscape, GPT OSS 120B sits among the capable offerings from OpenAI With advanced reasoning, it competes with the most capable models on the market. What sets it apart on Qubax isn't just the model itself — it's the accessibility. Rather than dealing with enterprise contracts or traditional payment rails, you get instant access via an OpenAI-compatible endpoint. That means you can drop GPT OSS 120B into Cursor, Cline, LangChain, or any framework that speaks the OpenAI protocol and start building immediately.
Qubax offers GPT OSS 120B at 3% below OpenRouter's price — just $0.126 per million input tokens and $0.630 per million output tokens. That pricing advantage compounds quickly at scale: a high-volume application sending millions of tokens per day can save significantly compared to using OpenRouter or the provider directly. And because Qubax runs on crypto-native infrastructure, you can pay with USDC, USDT, ETH, BTC, or 200+ other cryptocurrencies — no credit card or bank account required. New users even get $1 in free credits to test GPT OSS 120B risk-free before committing.
Pricing
| Token Type | Qubax | OpenRouter | You Save |
|---|---|---|---|
| Input (per 1M tokens) | $0.126 | $0.130 | 3% |
| Output (per 1M tokens) | $0.630 | $0.650 | 3% |
Prices per 1 million tokens. Pay with 200+ cryptocurrencies.
Estimated Monthly Cost
Specifications
Use Cases
Capabilities
Quick Start
from openai import OpenAI
client = OpenAI(
base_url="https://api.qubax.ai/v1",
api_key="qbx_live_YOUR_API_KEY",
)
response = client.chat.completions.create(
model="e2ee-gpt-oss-120b-p",
messages=[
{"role": "user", "content": "Hello!"}
],
)
print(response.choices[0].message.content)import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://api.qubax.ai/v1",
apiKey: "qbx_live_YOUR_API_KEY",
});
const response = await client.chat.completions.create({
model: "e2ee-gpt-oss-120b-p",
messages: [{ role: "user", content: "Hello!" }],
});
console.log(response.choices[0].message.content);curl https://api.qubax.ai/v1/chat/completions \
-H "Content-Type: application/json" \
-H "Authorization: Bearer qbx_live_YOUR_API_KEY" \
-d '{
"model": "e2ee-gpt-oss-120b-p",
"messages": [{"role": "user", "content": "Hello!"}]
}'Get your API key from the dashboard. New users get $1 free credits.
Why use GPT OSS 120B on Qubax?
3% Cheaper
Up to 3% off OpenRouter prices
Pay with Crypto
200+ coins (BTC, ETH, SOL, USDT, USDC & more). No credit card needed.
OpenAI Compatible
Drop-in replacement. Works with Cline, Cursor, any tool.
More from OpenAI
Compare GPT OSS 120B with alternatives
| Model | Provider | Input / 1M | Output / 1M | vs GPT OSS 120B |
|---|---|---|---|---|
| GPT OSS 120B | OpenAI | $0.126 | $0.630 | — |
| NVIDIA Nemotron 3 Ultra 550B | Other | $0.130 | $0.650 | More expensive |
| Qwen 3.6 35B A3B (E2EE) | Alibaba | $0.213 | $0.639 | More expensive |
| GLM 4.5 | Zhipu AI | $0.078 | $0.286 | Cheaper |
| GLM 5.1 Non-thinking (Morpheus Web) | Zhipu AI | $0.195 | $0.650 | More expensive |
Frequently Asked Questions
How much does the GPT OSS 120B API cost?
On Qubax, GPT OSS 120B costs $0.126 per 1M input tokens and $0.630 per 1M output tokens. This is 3% cheaper than OpenRouter's price of $0.130 per 1M input tokens.
Is the GPT OSS 120B API compatible with OpenAI?
Yes. Qubax provides an OpenAI-compatible API. You can use GPT OSS 120B as a drop-in replacement by changing your base URL to https://api.qubax.ai/v1 and using your Qubax API key. It works with Cline, Cursor, OpenCode, Hermes Agent, and any tool that supports OpenAI APIs.
Why is GPT OSS 120B cheaper on Qubax than OpenRouter?
Qubax sources AI inference from the Surplus Intelligence marketplace, an open marketplace on the Base blockchain where compute providers compete on price. We pass the savings to you — 3% cheaper than OpenRouter's price for GPT OSS 120B.
How do I pay for GPT OSS 120B API usage?
Qubax uses prepaid crypto credits. Deposit USDC on the Base chain and your balance is automatically deducted as you use the API. New users get $1 in free credits to start. No credit card required.
What is the context window of GPT OSS 120B?
GPT OSS 120B supports a context window of 128K tokens, allowing you to process large documents, codebases, or long conversations in a single request.
What can I build with GPT OSS 120B?
GPT OSS 120B is versatile enough for a wide range of applications. You can use it to tackle complex multi-step reasoning tasks, process long documents and entire codebases, and more. Because it's served through Qubax's OpenAI-compatible API, integration into existing apps, agents, or workflows takes just a few lines of code.
How fast is GPT OSS 120B on Qubax?
GPT OSS 120B on Qubax supports streaming responses, so tokens begin arriving in real time as they're generated. Latency depends on the provider and prompt complexity, but most requests start streaming within 200–800 milliseconds. Qubax routes requests through the Surplus Intelligence marketplace, which selects the fastest available compute provider for each request — so you get competitive latency at a lower price.
GPT OSS 120B vs NVIDIA Nemotron 3 Ultra 550B: which should I choose?
GPT OSS 120B by OpenAI and NVIDIA Nemotron 3 Ultra 550B by Other are both strong models in a similar price tier. GPT OSS 120B excels at complex reasoning. NVIDIA Nemotron 3 Ultra 550B comes from a different lab and may have different strengths depending on your workload. On Qubax, GPT OSS 120B starts at $0.126/1M input tokens versus NVIDIA Nemotron 3 Ultra 550B's $0.130/1M — making GPT OSS 120B the more cost-effective option for high-volume workloads. Both are available on Qubax with crypto payments and OpenAI-compatible APIs, so you can try each and switch freely.
Can I use GPT OSS 120B for commercial projects?
Yes. GPT OSS 120B on Qubax can be used for commercial purposes. You own the outputs you generate. Qubax provides the API infrastructure — you bring your use case.
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