Apply your own routing policies, reduce token costs automatically, and see every routing decision in real time with Merge Gateway.
How GPT-OSS 120B performs*
Intelligence - general reasoning and knowledge
24
Coding - code generation and problem-solving
30
What GPT-OSS 120B costs to run
| Vendor | Input / 1M tokens | Output / 1M tokens | Zero data retention |
| --- | ---: | ---: | --- |
| Amazon Bedrock | $0.1500 | $0.6000 | Yes |
| Baseten | $0.1000 | $0.5000 | Yes |
| BytePlus | $0.1000 | $0.5000 | Yes |
| Fireworks AI | $0.1500 | $0.6000 | Yes |
| Parasail | $0.1000 | $0.7500 | Yes |
| Sail | $0.0600 | $0.4000 | No |
| Tera | $0.0900 | $0.3600 | Yes |
| Together AI | $0.1500 | $0.6000 | Yes |
Test GPT-OSS 120B
with Gateway’s Simulator
See a prompt's output, token spend, latency, and more with GPT-OSS 120B.
Route requests to GPT-OSS 120B in minutes
To get started in seconds, add our Gateway Implementation skill to your project, or pick your preferred SDK below. Check out our other quick start skills here.
Install the Merge Gateway SDK
Python
1$ pip install merge-gateway-sdkSend a request
Python
1from merge_gateway import MergeGateway
2
3client = MergeGateway(api_key="YOUR_API_KEY")
4
5response = client.responses.create(
6 model="openai/gpt-5.2",
7 input=[
8 {"type": "message", "role": "system", "content": "You are a helpful programming tutor. Explain the concepts clearly with practical examples."},
9 {"type": "message", "role": "user", "content": "Explain the concept of recursion in programming with a simple set of examples."},
10 ],
11)
12
13print(response.output[0].content[0].text)Try a diffrent model
Swap the model string to route to a different provider. No other code changes needed.
Anthropic
1response = client.responses.create(
2 model="anthropic/claude-sonnet-4-20250514",
3 input=[
4 {"type": "message", "role": "system", "content": "You are a helpful programming tutor. Explain the concepts clearly with practical examples."},
5 {"type": "message", "role": "user", "content": "Explain the concept of recursion in programming with a simple set of examples."},
6 ],
7)Point to Gateway
Python
1from openai import OpenAI
2
3client = OpenAI(
4 api_key="YOUR_API_KEY",
5 base_url="https://api-gateway.merge.dev/v1/openai",
6)Send a request
Use the standard chat.completions.create method. No provider prefix needed on the model name.
Python
1response = client.chat.completions.create(
2 model="gpt-5.2",
3 messages=[
4 {"role": "system", "content": "You are a helpful programming tutor. Explain the concepts clearly with practical examples."},
5 {"role": "user", "content": "Explain the concept of recursion in programming with a simple set of examples."},
6 ],
7)
8
9print(response.choices[0].message.content)Install packages
1npm install merge-gateway-ai-sdk-provider aiCreate the provider
TypeScript
1import { createMergeGateway } from "merge-gateway-ai-sdk-provider";
2
3const gateway = createMergeGateway({
4 apiKey: "YOUR_API_KEY",
5});Send a request
Use generateText to send a request. Model names use the provider/model format.
TypeScript
1import { generateText } from "ai";
2
3const { text } = await generateText({
4 model: gateway("openai/gpt-4o"),
5 prompt: "Explain the concept of recursion in programming with a simple set of examples.",
6});
7
8console.log(text);If you already have @ai-sdk/openai installed, point it at Gateway with a base URL change:
TypeScript
1import { createOpenAI } from "@ai-sdk/openai";
2
3const gateway = createOpenAI({
4 apiKey: "YOUR_API_KEY",
5 baseURL: "https://api-gateway.merge.dev/v1/ai-sdk",
6});
7
8// All generateText/streamText calls work unchangedInstall the Merge Gateway SDK
Anthropic SDK
1from anthropic import Anthropic
2
3client = Anthropic(
4 api_key="YOUR_API_KEY",
5 base_url="https://api-gateway.merge.dev/v1/anthropic",
6)
7
8message = client.messages.create(
9 model="claude-sonnet-4-20250514",
10 max_tokens=1024,
11 messages=[
12 {"role": "user", "content": "Explain the concept of recursion in programming with a simple set of examples."},
13 ],
14)
15
16print(message.content[0].text)Explore other models available in Merge Gateway
GPT-OSS 120B FAQ
Heading
What provider owns GPT-OSS 120B?
GPT-OSS 120B is a OpenAI model.
Which vendors can run GPT-OSS 120B?
Baseten is the default listed vendor, and other active vendors may also be available.
What context window does GPT-OSS 120B support?
GPT-OSS 120B supports 128,000 tokens on the primary listed vendor route.
What capabilities does GPT-OSS 120B support?
Gateway currently lists streaming, structured outputs, tool calling support for GPT-OSS 120B across its available vendor routes.
Try GPT-OSS 120B through Merge Gateway
Route, observe, and control AI requests across providers from one API.
