Unified AI API

The AI gateway for agents
across every model and modality

Route 200+ models instantly with built-in LLM observability, automated fallbacks, and strict budget caps to protect your spend.

Get API Key

Trusted by leading companies

Playground

Compare AI models side by side

Test prompts across models from OpenAI, Anthropic, Google, and more.

Try it live

Full playground

Chat with multiple models at once — click to swap

claude-haiku-4.5

gpt-5-nano

claude-haiku-4.5

gpt-5-nano

gemini-3-flash

0/6

Built-in control plane

One layer between your app and every model

Route intelligently, see exactly what's happening, protect your data, and prove it to auditors.

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

AWS BedrockEU

Claude Opus 4.6

AnthropicEU

GLM-5

BergetEU

Kimi K2.5

EvrocEU

GPT-5.4

OpenAIUS

Get started

Up and running in minutes

Drop-in compatible with the OpenAI SDK. Change one line.

01Get your API key

Create an account and grab your API key. Works with every model.

Get API Key

02Buy credits

Credits work with any model or provider. Only pay for what you use.

See all models & pricing

03Start building

Every major provider. Fully OpenAI SDK compatible.

Read the docs

Works with your favorite tools

Compatible with any tool that supports the OpenAI SDK.

OpenClaw

OpenCode

Cursor

Cline

Kilo Code

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!