Unified AI API

The AI gateway
for agents
across every model and modality

Route 200+ models instantly with built-in LLM observability
and full OpenAI SDK compatibility — with one line of code.

Get API Key See the Docs

1import OpenAI from "openai";
2
3const client = new OpenAI({
4  apiKey: "YOUR_OPPER_API_KEY",
5  baseURL: "https://api.opper.ai/v3/compat"
6});
7
8const response = await client.chat.completions.create({
9  model: "anthropic/claude-sonnet-4-5",
10  messages: [{ role: "user", content: "Hello!" }],
11});
Use Opper with the OpenAI SDK →

Trusted by thousands of developers and leading companies

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 200+ models from every major provider.

02Add credits

Pay-as-you-go with a flat 3% markup. Fallbacks, logging, and BYOK included on every plan.

03Start building

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

Control plane

Full control over every AI call

Upgrade as you scale and add the capabilities that matter to you.

Your
application

any language · any framework

ObserveKnow exactly what your AI agents are doingLLM Observability: Trace calls, score sessions, zero black boxes.RouteNever locked in, never downIntelligent Routing: Switch 200+ models instantly. No code changes.SteerConsistent quality without the premium pricePrompt Optimization: Frontier performance via in-context learning.GuardSensitive data never reaches the modelEnterprise Guardrails: Mask PII and filter content in real time.ComplyAudit-ready before the auditor asksAutomated Compliance: Strict budget caps and full audit trails.

AI models

Claude Opus 4.6

Claude Opus 4.6

Secure by design

Production-ready infrastructure that protects your data at every layer.

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

Trusted by teams shipping AI to production with confidence

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