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ZenMux

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Access 100+ AI models through one API with automatic routing and usage tracking.

FreemiumAI API GatewaysAI Model APIs

Verified Nov 2, 2026

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ZenMux website screenshot

What is ZenMux?

ZenMux is a unified gateway for accessing more than 100 AI models, including models from OpenAI, Anthropic, Google, and DeepSeek. Developers can connect through one account and API rather than manage separate provider integrations. It supports OpenAI, Anthropic, and Google Vertex AI protocols, while a browser interface provides chat, image generation, and video generation.

The platform includes automatic model selection based on prompts, task patterns, and historical performance. Multi-provider failover switches requests to backup channels when a provider becomes unavailable or reaches its limits. Usage dashboards track requests, tokens, and costs. An AI Insurance feature provides automatic compensation for qualifying output or performance problems, including hallucinations, excessive latency, and low throughput.

ZenMux offers Builder subscriptions for personal development, learning, and non-production testing, alongside usage-based billing for commercial deployments. Builder subscriptions have rate limits and weekly quotas and prohibit production use. Subscription and pay-as-you-go API keys are independent, allowing developers to use different billing arrangements for development and deployment.

What can ZenMux do?

  • Unified model API

    Access 100+ models through one API with support for OpenAI, Anthropic, and Google Vertex AI protocols.

  • Automatic model routing

    Let ZenMux select a model using your prompt, task patterns, and historical performance to balance quality and cost.

  • Multi-provider failover

    Switch requests to backup provider channels when a provider fails, reaches rate limits, or becomes unavailable.

  • Usage and cost dashboards

    Track requests, token consumption, and spending to understand usage and manage costs.

  • AI Insurance compensation

    Receive automatic compensation for qualifying problems such as hallucinations, excessive latency, or low throughput.

  • Browser-based generation

    Use models for chat, image generation, and video generation through a graphical interface.

Who is ZenMux for?

AI application developers
Connect applications and agents to multiple model providers through a single API.
Individual developers and learners
Use fixed-budget subscriptions for coding, prototyping, learning, and non-production testing.
Production engineering teams
Run commercial AI applications with usage-based billing, provider failover, and token-level cost tracking.

How much is ZenMux?

Official pricing

  • ZenMux Builder Plan

    Free

  • ZenMux Builder Plan

    $20/mo

  • ZenMux Builder Plan

    $100/mo

  • ZenMux Builder Plan

    $200/mo

  • Pay As You Go

    See website

Free plan: A $0 Builder subscription tier is available for non-production use, with rate limits and weekly quotas.

Frequently asked questions

How is ZenMux priced?

ZenMux offers Builder subscription tiers at $0, $20, $100, and $200 per month, plus pay-as-you-go billing based on actual usage. Paid Builder subscriptions start at $20 per month.

Can Builder subscriptions be used in production?

No. Builder subscriptions are for personal development, learning, and non-production testing; pay-as-you-go billing is intended for commercial and production applications.

Can I use subscriptions and pay-as-you-go together?

Yes. They use independent API keys, so you can use a subscription during development and pay-as-you-go for deployment.

What limits apply to Builder subscriptions?

Builder subscriptions have rate limits of 10–15 requests per minute and weekly quota caps. Pay-as-you-go is presented without those rate and concurrency limits.

Which API protocols does ZenMux support?

ZenMux supports OpenAI, Anthropic, and Google Vertex AI protocols.

ZenMux alternatives

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  1. 1OpenRouterAccess AI models from multiple providers through one API and chat interface.
  2. 2APIQIKAccess multiple AI models through one OpenAI-compatible API with automatic failover.
  3. 3NinjaChatChat with multiple AI models, compare answers, and create images and videos in one app.
  4. 4You.comAPIs for live web search, cited research, and AI model inference.
  5. 5falAccess generative media models through one API and deploy models on serverless GPUs.