LLM Gateway
Switch between 300+ AI models in one line of code, through one OpenAI-compatible API
with automatic fallbacks, cost optimization, and a full audit trail. No vendor lock-in.
Your App
Trusted by 50k+ developers and companies serving 10M+ users
Challenge
Direct model integrations lock you into single providers with no failover, waste budget on expensive models for simple tasks, and can't adapt to regional compliance needs.
Hard-coded model providers make it impossible to switch when better models emerge or when you need regional compliance.
A single API outage or rate limit can bring your entire application down. No built-in redundancy means lost revenue.
Using expensive flagship models for simple tasks wastes budget. No easy way to route different workloads to cost-optimal models.
Data sovereignty requirements force complex infrastructure. Can't easily use EU-hosted models when needed for compliance.
The Opper Way
Build once, run anywhere with intelligent model routing
The Opper LLM router switches between 300+ models with one line of code. Test OpenAI, Anthropic, Google, and others without rewriting your application. Deploy the best model for each task.
from openai import OpenAI
client = OpenAI(
base_url="https://api.opper.ai/v3/compat",
api_key=OPPER_API_KEY,
)
response = client.chat.completions.create(
model="openai/gpt-4o-mini",
messages=[...]
)
# Same SDK, 300+ models, automatic fallbacksConfigure backup models that activate instantly if your primary fails. Built-in retry logic and error handling keep your application running through outages and rate limits.
claude-sonnet-4.5claude-sonnet-4.5Route simple tasks to fast, cheap models and complex ones to premium models. Track spend per model and optimize your AI budget automatically.
gemini-2.5-flashgpt-5Access EU-hosted models from AWS, Azure, GCP, and providers like Berget AI for GDPR compliance. Switch regions as easily as switching models.
claude-sonnet-4.5claude-sonnet-4.5gpt-5gpt-5Every call logged. Every token tracked. Every dollar accounted for. Searchable logs for every model interaction with user attribution, cost breakdowns, and policy enforcement — ready for SOC 2, GDPR, and internal audits.
claude-sonnet-4.6gpt-5gpt-5Access the latest AI models from leading providers with unified pricing per million tokens.
All prices are per 1M tokens • EU and US regions available • Prices subject to change, see docs for latest
| Provider | Model | Region | Input (1M tokens) | Output (1M tokens) |
|---|---|---|---|---|
| Loading models... | ||||
Bring your own API keys or add custom model deployments using the Opper CLI or API.
opper models create example/my-gpt5 azure/gpt5-production YOUR_API_KEYLooking for a specific model? View complete model list →
FAQ
Case Study
GetTested uses Opper's LLM Gateway to translate biomarker data into personalized health recommendations at scale — serving 10,000+ customers monthly across 60 countries with reliable, fact-checked AI insights.
