Last refreshed 2026-05-22. Next refresh: weekly.
Why use gpt-oss-120b on Vercel AI Gateway?
Vercel AI Gateway offers gpt-oss-120b with pay-as-you-go pricing at $0.35/1M input tokens. Vercel AI Gateway is a unified AI proxy providing a single OpenAI-compatible API endpoint to 275+ models from 25+ providers including Anthropic, OpenAI, Google, Meta, Mistral, DeepSeek, xAI, Alibaba, Amazon, ByteDance, Cohere, MiniMax, MoonshotAI, KwaiPilot, Black Forest Labs, Recraft, Voyage AI, NVIDIA, and more.
Compare gpt-oss-120b across 9 providers to find the best fit for your use caseSetup recipe
Python + curlpip install openaiexport AI_GATEWAY_API_KEY=...import os
from openai import OpenAI
client = OpenAI(
api_key=os.environ["AI_GATEWAY_API_KEY"],openai/gpt-oss-120bRequest example
import os
from openai import OpenAI
client = OpenAI(
api_key=os.environ["AI_GATEWAY_API_KEY"],
base_url="https://ai-gateway.vercel.sh/v1"
)
response = client.chat.completions.create(
model="openai/gpt-oss-120b",
messages=[{"role": "user", "content": "Hello"}]
)
print(response.choices[0].message.content)Gotchas
- Use provider model ID "openai/gpt-oss-120b", not the LLMReference slug "gpt-oss-120b".
- creator/model-name e.g. kwaipilot/kat-coder-pro-v2
- The examples expect AI_GATEWAY_API_KEY; rename it only if your application config maps the new variable.
Compare gpt-oss-120b Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| OpenRouter | $0.04 | $0.18 |
| Together AI | $0.15 | $0.60 |
| Fireworks AI | $0.15 | $0.60 |
| GCP Vertex AI | $0.09 | $0.36 |
| NVIDIA NIM | — | — |
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $0.35 |
| Output tokens | $0.75 |
Capabilities
About gpt-oss-120b
OpenAI open-weight model with 120 billion parameters. Text-only model supporting reasoning, function calling, and structured outputs. Free for self-hosting. Released August 5, 2025.
FAQ
What does gpt-oss-120b cost on Vercel AI Gateway?
On Vercel AI Gateway, gpt-oss-120b costs $0.35 per 1M input tokens and $0.75 per 1M output tokens.
What is the context window for gpt-oss-120b on Vercel AI Gateway?
gpt-oss-120b supports a 131,072 token context window on Vercel AI Gateway.
How does Vercel AI Gateway compare to other gpt-oss-120b providers?
gpt-oss-120b is available from 9 providers. The cheapest input pricing is $0.039/1M tokens from OpenRouter.
What API model ID do I use for gpt-oss-120b on Vercel AI Gateway?
Use the model ID openai/gpt-oss-120b when calling Vercel AI Gateway's API.
Who created gpt-oss-120b?
gpt-oss-120b was created by OpenAI as part of the GPT-OSS model family.
Is gpt-oss-120b open source?
gpt-oss-120b is open source according to the seed data.