Model Matrix Directory OpenRouter vs Groq Cheapest LLMs
🌐 Universal LLM Gateway

OpenRouter API Pricing & Gateway Guide

One universal key and credit balance for over 200+ models. Zero token markup, dynamic failover routing, and automated prompt caching pass-through.

Token Markup
0%
Pure passthrough rates
Supported Models
240+
OpenAI, Claude, DeepSeek, Qwen
BYOK Custom Fee
$0.00
Bring your own API keys free
Failover Latency
<15ms
Instant multi-host reroute

🧮 Unified Balance & Dynamic Routing Estimator

Estimate how much credit balance you need on OpenRouter to run a multi-model stack (e.g. DeepSeek V3 for background tasks + Claude 3.5 Sonnet for complex reasoning):

DeepSeek V3 Workload (Millions of tokens / month) 40M tokens
Claude 3.5 Sonnet Workload (Millions of tokens / month) 5M tokens
DeepSeek Spend (Passthrough)
$8.40
Claude Spend (Passthrough)
$45.00
Total Unified Bill
$53.40
OpenRouter Fee
$0.00 (0%)

🚀 Key Architecture Capabilities

Feature How It Works Advantage to Developers
Dynamic Failover If primary host encounters rate limits (429) or timeouts, requests fall back to secondary providers. Zero 500/503 server errors in production user sessions.
Unified Credits Single prepaid credit pool (Stripe or USDC crypto) works across Anthropic, Google, DeepSeek, and Meta. No need to manage 10 separate credit cards and minimum deposit balances.
Prompt Caching Pass-Through Preserves Anthropic Prompt Caching and DeepSeek caching headers automatically. Enjoy 90% prompt cost cuts without custom reverse proxy setups.
BYOK Support Configure your own upstream API keys in OpenRouter dashboard. Access volume enterprise tier discounts while using OpenRouter analytics.

💻 Python OpenAI SDK Gateway Drop-in

from openai import OpenAI client = OpenAI( base_url="https://openrouter.ai/api/v1", api_key="your_openrouter_api_key", default_headers={ "HTTP-Referer": "https://checkapicost.com", "X-Title": "CheckAPICost Tooling" } ) # Route to DeepSeek V3 with fallback response = client.chat.completions.create( model="deepseek/deepseek-chat", messages=[{"role": "user", "content": "Analyze AWS S3 vs Cloudflare R2 egress economics."}], extra_body={ "provider": { "order": ["DeepInfra", "Together"], "allow_fallbacks": True } } ) print(response.choices[0].message.content)

Frequently Asked Questions

Does OpenRouter charge extra fees or markup on top of provider prices?
OpenRouter passes through underlying provider token prices directly with 0% markup for standard usage. They monetize via custom enterprise agreements and small processing fees on credit card top-ups.
What is OpenRouter Bring Your Own Key (BYOK)?
BYOK allows developers to link their own Anthropic, OpenAI, or AWS Bedrock API keys directly into OpenRouter, routing through OpenRouter's unified interface and analytics with zero extra platform fees.
How does OpenRouter handle provider downtime and rate limits?
OpenRouter includes automatic dynamic fallback routing. If your preferred host (e.g. Together AI) returns a 429 or 503 error, OpenRouter reroutes the prompt to another host (e.g. Fireworks or DeepInfra) in milliseconds without crashing your application.