AI API

Opper AI

A unified AI gateway providing access to 300+ leading models through one EU-hosted, GDPR-compliant API with an OpenAI SDK-compatible interface.

What is Opper AI?

Opper AI is a European AI gateway that aggregates 300+ language, image, voice, and video models into a single API, offering intelligent routing, observability, compliance, and agent support.

Opper AI vs Similar AI Tools

Pricing ModelFree, FreemiumFree, FreemiumFree, Free Trial, Custom PricingFree, Freemium
Free Credits
Key Features
  • Unified access to 300+ AI models via one API
  • OpenAI SDK compatible endpoint
  • EU-hosted and GDPR-compliant infrastructure
  • Deadline-aware cost optimization for LLM requests
  • Supports OpenAI, Anthropic, and Gemini models
  • No changes to your request - same model and parameters
  • 5-minute setup
  • Completely self-serve, no sales calls
  • MCP server for out-of-the-box integration
  • Usage metering
  • Flexible pricing models (usage, credits, outcomes, hybrid)
  • Margin tracking per customer
Pros
  • Access 300+ models through a single API
  • EU-hosted and GDPR-compliant, ideal for European companies
  • Significant cost reduction (claimed 47% average)
  • No changes to your existing code or client
  • Fast 5-minute setup and self-serve onboarding
  • MCP server enables immediate agent integration
  • AI-native billing infrastructure
  • Supports multiple pricing models
Cons
  • Pricing not fully transparent without account
  • 3% fee on credit purchases may be a hidden cost
  • Added latency for flex requests (about 16% more time to first token)
  • Cost savings only apply to flex-capable models
  • Pricing details not publicly listed
  • Requires technical integration for custom implementations
  • Limited public pricing transparency
  • Primarily focused on AI companies
Best For
  • Developers needing multi-model access with EU compliance
  • Teams building AI agents and applications
  • Developers running high-volume LLM inference
  • Teams looking to reduce AI costs without switching models
  • AI agent developers
  • Agent-first startups
  • AI startups
  • SaaS companies with usage-based billing

How to use Opper AI?

  1. 1Sign up for an account and generate an API key.
  2. 2Add credits to your wallet or bring your own provider keys.
  3. 3Use the OpenAI SDK with baseURL https://api.opper.ai/v3/compat and specify models as provider/model (e.g., anthropic/claude-sonnet-4-5).
  4. 4Optionally use the Agent CLI to run coding agents like Claude Code, Codex, or OpenCode on Opper's gateway.

Opper AI Key Features

  • Unified access to 300+ AI models via one API
  • OpenAI SDK compatible endpoint
  • EU-hosted and GDPR-compliant infrastructure
  • Intelligent routing across providers and regions
  • Observability with full tracing and analytics
  • AI agent support with CLI and SDK
  • Built-in compliance and governance (PII masking, audit trails, budget caps)
  • Bring your own provider keys or use Opper credits

Opper AI Use Cases

  • Build and orchestrate AI agents with multi-model support
  • Deploy production applications requiring access to various LLMs
  • Ensure AI compliance and data residency for European organizations
  • Rapidly switch between models without rewriting integrations
  • Monitor and optimize AI spending and performance

Opper AI Pricing & Free Credits

Opper AI currently operates on a Free, Freemium model.

Free TierFree Credits

Free Tier

$0

Get started with free credits to test models and features.

Paid Plans

Pay-as-you-go

Variable

Pay per token usage. A 3% fee applies on credit purchases. Bring your own provider keys also supported.

Free Tier

$0

Get started with free credits to test models and features.

Pay-as-you-go

Variable

Pay per token usage. A 3% fee applies on credit purchases. Bring your own provider keys also supported.

Opper AI Pros & Cons

Pros

  • Access 300+ models through a single API
  • EU-hosted and GDPR-compliant, ideal for European companies
  • OpenAI SDK compatible, easy migration
  • Supports agents, observability, and governance
  • Pay-as-you-go with free credits to start

Cons

  • Pricing not fully transparent without account
  • 3% fee on credit purchases may be a hidden cost
  • Limited free tier credits

What is Opper AI best for?

  • Developers needing multi-model access with EU compliance
  • Teams building AI agents and applications
  • Organizations requiring GDPR-compliant inference

Opper AI FAQ

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