Blog · AI Gateway

One API for All LLMs

One endpoint, one key, one billing relationship — then call DeepSeek, Qwen, MiMo, GPT-5, Claude, and 24 more models without changing your code.

Why one API for all LLMs matters

Every model provider has its own SDK, its own API format, its own billing dashboard, and its own authentication. Managing three providers means three integrations, three sets of documentation to track, and three separate invoices. With one API for all LLMs, you wire up the OpenAI SDK once and call any model by changing a single string.

AI24X gives you a single OpenAI-compatible endpoint that routes to 29+ models across DeepSeek, Qwen, GLM, Kimi, MiMo, GPT-5, Claude, and more. The same base_url, the same api_key, the same JSON format — just swap the model field.

How it works

from openai import OpenAI
client = OpenAI(
    base_url="https://api.ai24x.com/v1",
    api_key="sk-your-key"
)

# Call any model — same client, different model name
response = client.chat.completions.create(
    model="flash",           # DeepSeek V4 Flash
    messages=[{"role": "user", "content": "Hello!"}]
)

# Or switch to a different provider
response = client.chat.completions.create(
    model="qwen-max",        # Qwen Max
    messages=[{"role": "user", "content": "Hello!"}]
)

No SDK swap. No new integration. Just a different model name.

Models available through one API

Provider	Models	Starting Price
DeepSeek	V4 Flash, V4 Pro	$0.22/M input
Qwen	Max, Turbo, Qwen3	$0.88/M input
MiMo (Xiaomi)	V2.5 Pro, V2.5 Flash	$0.14/M input
GLM (Zhipu)	GLM-4-Plus, GLM-4-Air	$1.00/M input
Kimi (Moonshot)	K3, K2.6 (1M context)	$0.55/M input
OpenAI	GPT-5, GPT-4o	$3.00/M input
Anthropic	Claude Opus, Claude Sonnet	$3.00/M input

Who needs one API for all LLMs

Independent developers building AI features — avoid locking into one provider early
Agent and RAG pipelines that route between cheap and capable models per task
IDE extensions and coding tools that let users pick their preferred model
Teams migrating from OpenAI to more cost-effective Chinese LLMs without rewriting code

One API vs managing providers directly

	Direct providers	One API (AI24X)
SDKs to maintain	1 per provider	1 (OpenAI SDK)
API keys	1 per provider	1 gateway key
Billing dashboards	N dashboards	1 dashboard
Failover	Custom code	Automatic
Cost tracking per model	Manual	Built-in

Getting started

curl -X POST "https://api.ai24x.com/v1/chat/completions" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer sk-your-key" \
  -d '{"model":"flash","messages":[{"role":"user","content":"Hi"}]}'

One API for all LLMs. Start free.

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