ModelServer — AI model proxy logoModelServer
One key. Every model.

One API,
every model.

40+ leading models — Claude, GPT, Gemini, DeepSeek and more — behind a single OpenAI-compatible API. Pay as you go, automatic failover.

Start for freeView pricing
5-minute integration5.5% transparent feeNo subscription · No minimums
Supported models

Every flagship model,
one API key.

No more juggling provider accounts. We handle upstream APIs, key rotation, quota management and failover. You focus on your product.

See all models and pricing
Anthropic
Claude Opus 4
Input
$15.00
Output
$75.00
/ 1M tok
Anthropic
Claude Sonnet 4
Input
$3.00
Output
$15.00
/ 1M tok
OpenAI
GPT-4o
Input
$2.50
Output
$10.00
/ 1M tok
OpenAI
GPT-4o mini
Input
$0.15
Output
$0.60
/ 1M tok
Google
Gemini 2.5 Pro
Input
$1.25
Output
$10.00
/ 1M tok
DeepSeek
DeepSeek R1
Input
$0.55
Output
$2.19
/ 1M tok
Drop-in replacement

Point your base URL at us,
that's it.

Your existing OpenAI SDK code works unchanged. Two lines of config to access every model. Streaming, tool calls and multimodal fully supported.

quick_start.py
from openai import OpenAI

client = OpenAI(
    api_key="sk-modelserver-...",
    base_url="https://modelserver.dev/v1",
)

response = client.chat.completions.create(
    model="claude-sonnet-4",  # or gpt-4o, gemini-2.5-pro...
    messages=[{"role": "user", "content": "Hello"}]
)
Why ModelServer

One gateway, everything covered.

01

Drop-in integration

OpenAI-compatible API. Change the base URL and every existing SDK just works.

02

Transparent pricing

Upstream prices passed through + 5.5% platform fee. No subscriptions, no quotas, pay only for what you use.

03

Self-healing

Automatic key rotation, smart retries, cross-provider fallback. Your app never goes down.

Ready to get started?

Sign up to get an API key and start calling any model in 5 minutes.

Start for freeRead the docs
ModelServer — One key. Every model.