99.99% Service Availability · All Models Official Direct Connect
Nexus API
Unified AI API Gateway
GPT-5 · Claude Opus 4.6 · DeepSeek R1 · Qwen · Doubao — all via one API key.
All models connect directly to official APIs. Fast response, rock-solid stability. OpenAI-compatible, up to 70% cheaper.
99.9%Service Uptime
15+AI Models
24×7Tech Support
<200msAvg Response
GPT-5Claude Opus 4.6Claude Sonnet 4.6DeepSeek V3DeepSeek R1Qwen-PlusQwen-TurboDoubao-ProGPT-5 MiniClaude Haiku 4.5Doubao-Seed-2.0Doubao-LiteQwen 3.6 PlusQwen 3.5 FlashGPT-5Claude Opus 4.6Claude Sonnet 4.6DeepSeek V3DeepSeek R1Qwen-PlusQwen-TurboDoubao-ProGPT-5 MiniClaude Haiku 4.5Doubao-Seed-2.0Doubao-LiteQwen 3.6 PlusQwen 3.5 Flash
Why Choose Us
What makes Nexus API different?
Enterprise-grade infrastructure. Startup-friendly pricing.
All Models Official Direct Connect
- Claude via AWS Bedrock, GPT via OpenAI official
- DeepSeek, Qwen, Doubao — all official API direct
- Zero proxy — fastest response, rock-solid stability
<200msavg response
Up to 80% Cheaper Than Claude
- DeepSeek R1 — same reasoning quality, 1/5 the cost of Claude
- Qwen-Plus — GPT-level performance at 90% less per task
- Chinese AI models use far fewer tokens for the same work
80%cost savings per task
15+ Top AI Models
- GPT-5, Claude Opus 4.6, DeepSeek R1
- Qwen-Plus, Doubao-Seed-2.0, and more
- 100% OpenAI-compatible — one API key for all
15+models available
Plug & Play Integration
- Drop-in replacement — just change base_url
- Works with Claude Code, Codex, Gemini CLI, RooCode
- Python, Node.js, cURL, Go — any language
3 minto get started
MODELS
Supported AI Models
Text generation, image creation, video synthesis — all in one API.
Quick Start
Up and running in 3 minutes
01
Sign Up
Create a free account and get 5,000 free credits instantly.
02
Get API Key
Generate your API key from the dashboard in one click.
03
Start Calling
Replace your base_url — everything else stays the same.
Example — Python
from openai import OpenAI
client = OpenAI(
api_key="YOUR_NEXUS_API_KEY",
base_url="https://nexusapi.one/v1", # ← only change this
)
response = client.chat.completions.create(
model="deepseek-chat",
messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)FAQ
Frequently Asked Questions
What is Nexus API?
Nexus API is an AI API gateway with all models connected directly to official APIs (not third-party proxies). Access GPT-5, Claude Opus 4.6, DeepSeek, Qwen, Doubao and more through a single OpenAI-compatible endpoint. Fast response, rock-solid stability.
How do I get started?
Sign up for a free account, generate an API key in the console, then set base_url to our endpoint. It works as a drop-in replacement for OpenAI, Anthropic, and other providers.
How is pricing calculated?
Text models are billed per token (input + output separately). You top up credits in USD and we deduct based on actual usage. No subscriptions, no hidden fees.
How much can I save vs Claude/GPT?
Chinese AI models like DeepSeek R1 and Qwen-Plus deliver comparable quality while using far fewer tokens per task. In real-world usage, DeepSeek costs roughly 1/5 of Claude for the same coding or reasoning task. You get the same result for a fraction of the price.
Which tools does it work with?
Nexus API works with Claude Code, OpenAI Codex, RooCode, KiloCode, Qwen Code, and any tool that supports OpenAI-compatible APIs. Just change the base URL.
Which models are supported?
We currently support GPT-5, Claude Opus/Sonnet/Haiku 4.x, DeepSeek-Chat, DeepSeek-Reasoner, Qwen-Plus, Qwen-Turbo, and Doubao models. New models are added regularly.
Is there a free tier?
Yes. New users get free credits upon registration, plus daily check-in bonuses. This is enough to try out the service before topping up.
Start using Nexus API today
Sign up now and get 5,000 free credits to explore the full power of AI APIs.
No credit card required · Free tier available · Cancel anytime