/v1/chat/completions
Text requests and AI agents
Messages, streaming, tools and structured output in a familiar OpenAI-compatible format.
API429 AI GatewayOne API for models, payments and spend control
OpenAI-compatible API for AI products
Connect AI modelsthrough one API
API429 helps teams run LLMs, Gemini and image generation through one endpoint. Lower costs, easier payments, clear balance control and fast OpenAI SDK migration.
Works withOpenAI SDKCursorOpenClawClaude Coden8n
OPENAI-COMPATIBLE
https://balancer.api429.com/v1RequestModelBalanceLimits
Move fast without rewriting the product
Replace the baseURL, choose a model, and send requests through API429. Balance, pricing and model access stay in one clear layer.
clientOpenAI SDK
baseURLapi429.com/v1
modelgemini-3.5-flash
streamtrue
endpoint/chat/completions
status200
pricingup to -70%
up to 70%below official prices
1 APIfor chat, images, models and balance
/v1OpenAI SDK compatible
fewer 429sfewer limit-related stops and spikes
What you can do with API429
One gateway covers the core AI workload: text, images, available models, balance, pricing and limits. No separate migration for every provider API.
Image generation
Content, creatives, product cards, covers and automated media pipelines.
Available models
See which models are available to your token without static lists or manual checks.
Balance, cost and limits
Control spend, smooth traffic spikes and reduce stops caused by 429 limits.
Traffic spike reserve
Build queues, retries and fallback logic so your product stays calmer during sudden workload bursts.
Popular directions
Not only Gemini: pick models by workload
API429 covers core AI product workloads: text, code, reasoning, images, video, voice and live scenarios.
GPT and Codex
GPT 5.5 for coding, reasoning, agents and product assistants through one OpenAI-compatible endpoint.
Claude / Anthropic
Claude Opus 4.8 for complex text work, analysis, support and careful generation.
Gemini
Gemini 3.5 Flash, Pro, Live and long-context workloads for chat, search, multimodal tasks and scale.
Image generation
GPT Image 2, Nano Banana 2, FLUX.2 Pro and other image models for content, product cards and visual pipelines.
Video / Veo
Gemini Omni, Veo and video tariffs per second or per run: clips, upscaling, audio and silent variants.
Voice / TTS
Eleven Labs, Gemini TTS and Microsoft Azure TTS for narration, voice output, assistants and voice products.
AI models below official API prices
Compare direct provider pricing with API429, pick the right model for the job, and scale generations without wasted spend.
G
Gemini 3.5 Flash
Popular fast model
Official Price:$1.5 / 1M input
Our Price:$0.45 / 1M input
G
GPT 5.5
Reasoning, code and agents
Official Price:$5 / 1M input
Our Price:$1.5 / 1M input
C
Claude Opus 4.8
Complex analysis and writing
Official Price:$5 / 1M input
Our Price:$1.5 / 1M input
Nano Banana 2
New ContentPopular image generation with control over characters, details and production visuals.
Official Price:$0.039 / img
Our Price:$0.012 / img
What customers care about
Why teams connect API429
The platform covers practical work: model access, lower costs, flexible payments and traffic control without a complex migration.
One OpenAI-compatible API
Use the familiar /v1 format: change the baseURL and API key while your SDK, streaming flow and request shape stay familiar.
Lower model costs
Target up to 70% savings on popular models. This matters for chat, agents, content generation and high-volume pipelines.
Flexible payments
Top up by card, bank transfer or crypto. Teams can plan spend and keep model access in one place.
Spend and limit control
Balance, available models and limits live in a separate gateway layer, making traffic spikes and 429 errors easier to manage.
API429 focusSpend less time on integration and payments, and get more control over AI costs.
How to Start
The flow is simple: get access, add balance, and change the API address in your code.
1
Get access
We open the dashboard and API token
➔
2
Top up balance
Card, bank transfer, or crypto
Balance:$50.00
USDTCARD
3
Change the API URL
Your OpenAI SDK keeps working
baseURL:
https://balancer.api429.com/v1
Node.js Integration
If your project already uses the OpenAI SDK, setup is usually two lines: a new baseURL and an API429 token.
- Minimal code changes
- Streaming for fast interfaces
- Model list through /v1/models
gemini-client.ts
import OpenAI from "openai";
// OpenAI-compatible endpoint API429
const client = new OpenAI({
apiKey: "gw_xxxxxxxxxxxx",
baseURL: "https://balancer.api429.com/v1"
});
const response = await client.chat.completions.create({
model: "gemini-3.5-flash",
messages: [
{ role: "user", content: "Explain AI request routing briefly" }
],
stream: true
});
for await (const chunk of response) {
process.stdout.write(chunk.choices[0]?.delta?.content ?? "");
}app.py
from openai import OpenAI
# OpenAI-compatible endpoint API429
client = OpenAI(
api_key="gw_xxxxxxxxxxxx",
base_url="https://balancer.api429.com/v1",
)
response = client.chat.completions.create(
model="gemini-3.5-flash",
messages=[
{"role": "user", "content": "Write a Hello World script"}
],
)
print(response.choices[0].message.content)Python SDK
For backends, AI agents, and content pipelines, use the same openai client. API429 handles access, balance, and part of the limit routine.
- Good for agents and automation
- Practical for Python pipelines
Request Access
Get test access, an API key, and individual conditions
Prefer quick contact?
Write in Telegram and we will help choose a tariff or launch integration.