One endpoint · every frontier lab

Every model has a door. You hold one key.

One OpenAI-compatible API key routes every major model — Claude, GPT, Gemini, DeepSeek, Mistral — with automatic failover, real-time latency routing, and a single bill. Your stack stays. The key changes.

Start building → Browse models
24 models 99.99% uptime p50 380ms $0 platform fee
api.nexoai.dev — live request LIVE
POST/v1/chat/completionsHTTP/1.1
→200 OK · text/event-stream · response:
{
  "model": "auto",
  "routed_to": "claude-sonnet-5",
  "latency_ms": 412,
  "provider": "anthropic",
  "cost": "$0.0018",
  "status": "streaming"
}
p50 380ms req 8a2f1c · stream SSE routed claude-sonnet-5 cost $0.0018

One key. Every major lab.

OpenAI Anthropic Google DeepSeek Mistral xAI
24
models live
99.99%
uptime
380ms
p50 latency
$0
platform fee
The whole migration

Change one line.
Keep your stack.

Point your existing OpenAI SDK at NexoAI and keep every model call, every retry, every library. One base URL is the entire migration.

Read the docs →
1# before — vendor-locked
2from openai import OpenAI
3client = OpenAI(api_key=os.environ["ANTHROPIC_KEY"])
4
5# after — one key, every model
6client = OpenAI(
7  base_url="https://api.nexoai.dev/v1",
8  api_key=os.environ["NEXOAI_KEY"],
9)
10
11resp = client.chat.completions.create(
12  model="auto", # routed for you
13  messages=messages,
14)
base_url — the only line that changes OpenAI SDK · v1+
Why teams switch

Infrastructure that stays out of your way.

Gateways should be boring in the best way: invisible until you need them, then exactly as powerful as the situation demands.

01

Real-time routing, not round-robin

Every request is scored against live latency, cost and error rates per provider. "auto" is a decision, not a dice roll.

p50 380ms0.3s failoverauto-routed
02

Fallbacks that actually fire

When a provider degrades, traffic shifts to the next-best model mid-request. Your users see a response, not a 503.

99.99% uptimestream-safe
03

One bill, honest numbers

Per-provider cost broken out in real time. No markup surprises, no platform fee, no minimums — you pay the labs, we add the key.

$0 platform feelive cost per call
Free tier · no card · 2 minutes to first request

One key. Every model.

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2 minutes to first request · usage-based · cancel anytime