Unified AI API

The AI gateway
for agents on any model

One LLM router with 300+ models, built-in observability and full OpenAI SDK compatibility —
change one line of code.

Get API KeySee the Docs
import OpenAI from "openai";
const client = new OpenAI({
  apiKey: "YOUR_OPPER_API_KEY",
  baseURL: "https://api.opper.ai/v3/compat"
});
const response = await client.chat.completions.create({
  model: "anthropic/claude-sonnet-4-5",
  messages: [{ role: "user", content: "Hello!" }],
});
Use Opper with the OpenAI SDK →

Trusted by 50k+ developers and companies serving 10M+ users

AI-BOB
Aixia
Evroc
GetTested
Instabridge
Ping Payments
Steep
Svenska Bostäder

Models

Every frontier model, one API

300+ models across text, image, voice, and video — 20+ providers, EU and US hosted.

Claude Opus 4.7

Claude Opus 4.7

AWS EU·Anthropic US

GPT-5.5

GPT-5.5

Azure EU·OpenAI US

Gemini 3.1 Pro

Gemini 3.1 Pro

Google EU + US

GLMMetaDeepSeekMistralQwenNemotron
Try 300+ models in playground →
View all models →

Agent CLI

Use any agent
on any model

Route any AI coding agent through one gateway — EU residency, fallbacks, pay-as-you-go.

Claude CodeAnthropic's coding agent
$opper launch claude
CodexOpenAI's coding agent
$opper launch codex
OpenCodeSST's open-source coding agent
$opper launch opencode
OpenClawOpen-source personal AI agent
$opper launch openclaw
HermesNous's open-source agent
$opper launch hermes
PiPersonal AI from Inflection
$opper launch pi
Explore the Agent CLI →

AI agent control plane

Add control
as you scale

Start with the gateway — layer on governance, policy, and budgets when you need them.

Opper
ObserveFull visibility into every call, token, and sessionRouteIntelligent routing across providers and regionsSteerFrontier performance with context engineeringGuardMask PII and filter content in real timeComplyBudget caps and full audit trails
Explore the control plane →

Get started

Up and running in minutes

One key, every model, zero setup.

01Get your API key

Create an account, get your API key and instantly access 300+ models from every major provider.

02Add credits

Pay-as-you-go with fallbacks, logging, and BYOK included on every plan.

03Start building

Every call is logged automatically. Switch models, track costs, and scale with full visibility.

Security

Secure by design

Encryption, isolation, and EU residency — by default.

Data privacy

Opper never uses your data for training. Optional zero data retention for full control.

Infrastructure security

End-to-end encryption. AES-256 at rest. TLS in transit. Isolated data per organization.

Data residency

Platform hosted in AWS Stockholm. Choose from EU and global model providers, or BYOK.

Read our security overview

Customers

Teams shipping AI on Opper

Digital Lab launching AI to more than 60 countries including US and India

Ping Payments (payment orchestration platform) is growing 40 % year-on-year

AI-BOB Cuts Compliance Reviews from Days to Minutes Using Opper

We can optimize for 300% efficiency and still have time to skate where the puck is going, not where it is.
Petter Sehlin,
Ping Payments
We will continue to build the world's biggest digital lab, and will partner with Opper going forward in this mission.
Patrik Johansson,
Gettested.io
Low-code used to be more efficient but that seems to be changing now. Kudos to a great product!
Lucas,
Älska.studios