gpt-4.1
GPT-4.1
Input / 1M
$2.00
Output / 1M
$8.00
Context
1,047,576 tokens
Pay as you go
Unified LLM gateway · Denver, Colorado
Every frontier model.
Every frontier model.
One true course.
Connect once to Voyage AI and route GPT, Claude, Gemini and DeepSeek through a single OpenAI-compatible endpoint. One key, one bearing, transparent USD token billing.
12live models
4providers
1API endpoint
USDtoken billing
Gateway operational
v1
POST
/v1/chat/completions
GPT-4.1
Claude 4
Gemini 2.5
DeepSeek
Native SSE
Token metered
One key
One course from your app to every upstream model.
Live catalog
View all models →
Frontier models, priced per token
gpt-4.1-mini
GPT-4.1 mini
Input / 1M
$0.40
Output / 1M
$1.60
Context
1,047,576 tokens
Pay as you go
gpt-4o
GPT-4o
Input / 1M
$2.50
Output / 1M
$10.00
Context
128,000 tokens
Pay as you go
gpt-4o-mini
GPT-4o mini
Input / 1M
$0.15
Output / 1M
$0.60
Context
128,000 tokens
Pay as you go
o4-mini
o4-mini
Input / 1M
$1.10
Output / 1M
$4.40
Context
200,000 tokens
Pay as you go
claude-opus-4
Claude Opus 4
Input / 1M
$15.00
Output / 1M
$75.00
Context
200,000 tokens
Pay as you go
claude-sonnet-4
Claude Sonnet 4
Input / 1M
$3.00
Output / 1M
$15.00
Context
200,000 tokens
Pay as you go
claude-3-5-haiku
Claude 3.5 Haiku
Input / 1M
$0.80
Output / 1M
$4.00
Context
200,000 tokens
Pay as you go
· Why Voyage AI ·
Charted for speed, not friction
A gateway that stays out of your way: OpenAI-compatible requests in, metered streams out, every charge on the chart.
Drop-in OpenAI compatibility
Point the official OpenAI SDK at https://voyageaiapi.com/v1 and switch models by changing one string. Tool calls, JSON mode and streaming pass through untouched.
Streams as they happen
Server-sent events are proxied the moment they arrive, so your users see the first token as soon as the upstream model produces it — no buffering layer in between.
Token-level clarity
Every request is metered from the prompt and completion tokens reported upstream. No seats, no monthly minimum, no expiry on wallet balance.
· Quick start ·
Live in three steps
From sign-up to your first completion in a few minutes. No credit card needed to open the console.
1
Create your account
Sign up with your email and open the console. Your wallet starts at $0.00.
2
Top up your wallet
Submit a bank-transfer request. Our team emails you the account details and credits your balance once the transfer is confirmed.
3
Create a key and call the API
Generate an API key, then call /v1/chat/completions with any model from the catalog.
from openai import OpenAI
client = OpenAI(
api_key="sk-voyageai-...",
base_url="https://voyageaiapi.com/v1",
)
resp = client.chat.completions.create(
model="gpt-4.1",
messages=[{"role": "user", "content": "Hello!"}],
)
print(resp.choices[0].message.content)curl https://voyageaiapi.com/v1/chat/completions \
-H "Authorization: Bearer sk-voyageai-..." \
-H "Content-Type: application/json" \
-d '{
"model": "gpt-4.1",
"messages": [{"role": "user", "content": "Hello!"}],
"stream": true
}'import OpenAI from "openai";
const client = new OpenAI({
apiKey: "sk-voyageai-...",
baseURL: "https://voyageaiapi.com/v1",
});
const resp = await client.chat.completions.create({
model: "claude-sonnet-4",
messages: [{ role: "user", content: "Hello!" }],
});
console.log(resp.choices[0].message.content);
OpenAI-compatible · native SSE · token-metered
Full API reference →
· Platform ·
Costs you can see. Keys you control.
A console built around prepaid balance and auditable usage — not a monthly subscription you forget about.
Wallet-first billing
Prepaid USD balance, billed per token at each model's published rate. When the balance is empty, requests stop — no surprise invoices.
Live usage logs
Model, prompt and completion tokens, cost, latency and status are recorded for every request and visible in your console.
Keys you control
Create unlimited keys for different apps and environments, then revoke any key instantly from the console.
Human-reviewed top-ups
Bank transfers are checked by our team before credit is applied, keeping the wallet ledger clean and auditable.
12models in the live catalog
4frontier model providers
1API endpoint
100%usage-based spending
· FAQ ·
Questions, answered
What is Voyage AI?
Voyage AI is an AI model API gateway operated by VOYAGE TECHNOLOGY INC in Denver, Colorado. One API key gives you access to GPT, Claude, Gemini and DeepSeek models through the OpenAI-compatible API format.
Is it really OpenAI-compatible?
Yes. The gateway implements /v1/chat/completions and /v1/models with the same request and response schema, including server-sent event streaming. If your code works with OpenAI, change the base URL and key.
How does billing work?
Your wallet is prepaid in USD. Each request is billed per token at the model's published rate, using the usage figures returned by the upstream provider. Prompt and completion tokens are metered separately, and every charge appears in your usage log.
How do I top up my wallet?
Open the wallet in your console and submit a recharge request. Our team replies by email with bank account details; your balance is credited once the transfer is confirmed. Wallet balances do not expire.
Which models can I call?
See the Models page for the live catalog. Model availability and per-token rates are managed in the admin console, so the list can change without any code changes on your side.
What happens if a model is unavailable?
If no upstream channel is currently serving a model, the API returns a clear 503 error rather than a silent failure. Contact support and we will help route the request to an available model.
· Start building ·
Set your AI stack on course
One endpoint. Every model. Usage-based pricing that starts from zero.