Subscription Plans

ZenMux Builder Plan subscriptions provide individual developers with a fixed monthly fee and a predictable way to use AI models—so you can focus on coding and creating without worrying about the cost of each API call.

What are Flows?

A Flow is the metering unit used in ZenMux subscriptions, combining both token usage and request count.

📖 What can the Pro plan ($20/month, 50 Flows/5h) actually do?

Use Case	Example Models	Usage per 5 Hours	Monthly Usage
Image generation	NanoBananaPro, etc.	2K resolution 16:9, ~30 images	~2000 images
Coding	Claude Sonnet 4.5, etc.	Complete 5–10 coding tasks	~500+ tasks
Chat	GPT-5.2, etc.	~200 conversations	~12,000 chats

💡 Notes

Coding: Task complexity directly affects token consumption, which can cause significant differences in Flow usage.
Chat: Calculated based on 5000 input tokens + 1000 output tokens.
Different models can be converted proportionally based on unit pricing.

Why choose Builder Plan?

💡 Key Advantages

Pain Point	Subscription Solution
Worried about burning money while vibe coding	Fixed pricing from $20/month—code freely
Learning new tech is too expensive	Explore a wide range of AI models at low cost
Messy multi-platform account management	One API Key for all models
Diverse needs	Coding + image generation + chat—full-scenario coverage

🚀 Three Core Values

Full-scenario model coverage

Builder Plan covers three major model categories. Whether you’re a developer, designer, PM, or operator, one subscription covers the full set of Vibe Builder use cases:

Model Type	Representative Models
Coding models	Claude Opus 4.5 / GPT-5.2-Codex / Gemini-3-Pro-Preview ...
Image models	NanoBananaPro / GPT-Image-1.5 ... (rolling out)
Text generation	GPT-5.2 / Qwen3-Max-Thinking / ERNIE 5.0 ...

An all-star model lineup
One subscription lets you orchestrate the world’s top models (Gemini 2.5 Pro, GPT-5 series, Claude Opus/Sonnet 4 series, etc.). Get the latest flagship models as soon as they’re available—like having the strongest compute fleet working together.
Seamless IDE compatibility
No tool lock-in. One subscription API Key works across popular community developer tools like Claude Code, Cursor, CodeX, and more.

Plan Comparison

Free - Try for Free

Supported models:

deepseek/deepseek-chat - DeepSeek-V3.2 (Non-thinking Mode)
deepseek/deepseek-reasoner - DeepSeek-R1.8
inclusionai/ling-1t - inclusionAI: Ling-1T
inclusionai/ling-mini-2.0 - inclusionAI: Ling-Mini-2.0
inclusionai/ring-1t - inclusionAI: Ring-1T
inclusionai/ring-mini-2.0 - inclusionAI: Ring-Mini-2.0
minimax/minimax-m2.1 - MiniMax: MiniMax M2.1
stepfun/step-3 - StepFun: Step-3
volcengine/doubao-seed-1.8 - VolcanoEngine: Doubao-Seed-1.8
xiaomi/mimo-v2-flash - Xiaomi: MiMo-V2-Flash
z-ai/glm-4.6v-flash - Z.AI: GLM 4.6V Flash
z-ai/glm-4.7 - Z.AI: GLM 4.7

Pro - Best for Developers

Supported models: 70+ premium models, organized by provider below (modelSlug - description)

Anthropic Claude Series

anthropic/claude-opus-4.6 - Claude Opus 4.6
anthropic/claude-opus-4.5 - Claude Opus 4.5
anthropic/claude-sonnet-4.5 - Claude Sonnet 4.5
anthropic/claude-haiku-4.5 - Claude Haiku 4.5
anthropic/claude-opus-4.1 - Claude Opus 4.1
anthropic/claude-opus-4 - Claude Opus 4
anthropic/claude-3.5-sonnet - Claude 3.5 Sonnet
anthropic/claude-3.5-haiku - Claude 3.5 Haiku
anthropic/claude-3.7-sonnet - Claude 3.7 Sonnet
anthropic/claude-sonnet-4 - Claude Sonnet 4

OpenAI GPT Series

openai/gpt-5.2 - GPT‑5.2
openai/gpt-5.2-chat - GPT‑5.2 Chat
openai/gpt-5.2-codex - GPT‑5.2 Codex
openai/gpt-5 - GPT‑5
openai/gpt-5-chat - GPT‑5 Chat
openai/gpt-5-codex - GPT‑5 Codex
openai/gpt-5-mini - GPT‑5 Mini
openai/gpt-5-nano - GPT‑5 Nano
openai/gpt-5.1 - GPT‑5.1
openai/gpt-5.1-chat - GPT‑5.1 Chat
openai/gpt-5.1-codex - GPT‑5.1 Codex
openai/gpt-5.1-codex-mini - GPT‑5.1 Codex Mini
openai/gpt-4.1 - GPT‑4.1
openai/gpt-4.1-mini - GPT‑4.1 Mini
openai/gpt-4.1-nano - GPT‑4.1 Nano
openai/gpt-4o - GPT‑4o
openai/gpt-4o-mini - GPT‑4o Mini
openai/o4-mini - o4-mini

Google Gemini / Gemma Series

google/gemini-2.0-flash - Gemini 2.0 Flash
google/gemini-2.0-flash-lite-001 - Gemini 2.0 Flash Lite
google/gemini-2.5-flash - Gemini 2.5 Flash
google/gemini-2.5-flash-lite - Gemini 2.5 Flash Lite
google/gemini-2.5-flash-image - Gemini 2.5 Flash Image
google/gemini-2.5-pro - Gemini 2.5 Pro
google/gemini-3-flash-preview - Gemini 3 Flash Preview
google/gemini-3-pro-preview - Gemini 3 Pro Preview
google/gemini-3-pro-image-preview - Gemini 3 Pro Image Preview
google/gemma-3-12b-it - Gemma 3 12B IT

xAI Grok Series

x-ai/grok-4 - Grok 4
x-ai/grok-4-fast - Grok 4 Fast
x-ai/grok-4-fast-non-reasoning - Grok 4 Fast Non‑Reasoning
x-ai/grok-4.1-fast - Grok 4.1 Fast
x-ai/grok-4.1-fast-non-reasoning - Grok 4.1 Fast Non‑Reasoning
x-ai/grok-code-fast-1 - Grok Code Fast 1

Z.AI GLM Series

z-ai/glm-4.6v - GLM 4.6V
z-ai/glm-4.6v-flash - GLM 4.6V Flash
z-ai/glm-4.7 - GLM 4.7
z-ai/glm-4.5 - GLM 4.5
z-ai/glm-4.5-air - GLM 4.5 Air
z-ai/glm-4.6 - GLM 4.6

DeepSeek Series

deepseek/deepseek-chat - DeepSeek Chat
deepseek/deepseek-chat-v3.1 - DeepSeek Chat V3.1
deepseek/deepseek-v3.2 - DeepSeek V3.2
deepseek/deepseek-v3.2-exp - DeepSeek V3.2 Exp
deepseek/deepseek-r1-0528 - DeepSeek R1 0528
deepseek/deepseek-reasoner - DeepSeek Reasoner

Qwen / Tongyi Qwen Series

qwen/qwen3-coder - Qwen3 Coder
qwen/qwen3-coder-plus - Qwen3 Coder Plus
qwen/qwen3-max - Qwen3 Max
qwen/qwen3-max-preview - Qwen3 Max Preview
qwen/qwen3-vl-plus - Qwen3 VL Plus
qwen/qwen3-14b - Qwen3 14B
qwen/qwen3-235b-a22b-2507 - Qwen3 235B A22B 2507
qwen/qwen3-235b-a22b-thinking-2507 - Qwen3 235B A22B Thinking 2507

Moonshot / Kimi Series

moonshotai/kimi-k2.5 - Kimi K2.5
moonshotai/kimi-k2-thinking - Kimi K2 Thinking
moonshotai/kimi-k2-thinking-turbo - Kimi K2 Thinking Turbo
moonshotai/kimi-k2-0711 - Kimi K2 0711
moonshotai/kimi-k2-0905 - Kimi K2 0905

Baidu ERNIE Series

baidu/ernie-5.0-thinking-preview - ERNIE 5.0 Thinking Preview
baidu/ernie-x1.1-preview - ERNIE X1.1 Preview

InclusionAI Series

inclusionai/ling-1t - Ling‑1T
inclusionai/ling-flash-2.0 - Ling Flash 2.0
inclusionai/ling-mini-2.0 - Ling Mini 2.0
inclusionai/llada2.0-flash-cap - LLADA 2.0 Flash Cap
inclusionai/ming-flash-omni-preview - Ming Flash Omni Preview
inclusionai/ring-1t - Ring‑1T
inclusionai/ring-flash-2.0 - Ring Flash 2.0
inclusionai/ring-mini-2.0 - Ring Mini 2.0

Meta Llama Series

meta/llama-3.3-70b-instruct - Llama 3.3 70B Instruct
meta/llama-4-scout-17b-16e-instruct - Llama 4 Scout 17B 16E Instruct

Mistral Series

mistralai/mistral-large-2512 - Mistral Large 2512

MiniMax Series

minimax/minimax-m2-her - MiniMax M2 her
minimax/minimax-m2.1 - MiniMax M2.1
minimax/minimax-m2 - MiniMax M2

Kuaishou

kuaishou/kat-coder-pro-v1 - KAT‑Coder‑Pro‑V1

Stepfun

stepfun/step-3 - Step 3

Volcengine Doubao

volcengine/doubao-seed-1-6-vision - Doubao Seed 1.6 Vision
volcengine/doubao-seed-1.8 - Doubao Seed 1.8
volcengine/doubao-seed-code - Doubao Seed Code

Xiaomi

xiaomi/mimo-v2-flash - MiMo V2 Flash

Image Generation Models

nanobanana/nanobanana-pro - NanoBananaPro (2K resolution; supports 16:9 and more aspect ratios)
openai/gpt-image-1.5 - GPT-Image-1.5 (coming soon)
tencent/hunyuan-image3 - Hunyuan-Image3 (coming soon)

Max - High-Intensity Development

Additional top-tier flagship models:

openai/gpt-5.2-pro - GPT-5.2 Pro
openai/gpt-5-pro - GPT-5 Pro

Ultra - Professional Flagship

Supported models: Same as the Max plan, including all premium models and all top-tier flagship models.

Usage Limits

⚠️ Important

Subscription plans are designed for personal development, learning/exploration, vibe coding, and other non-production use cases. Please follow the usage rules below:

Rate Limits

Rate Limit: 10–15 RPM (requests per minute)
Quota window: Refreshed within a rolling 5-hour window
Weekly limit: Resets within a rolling weekly window

Applicable Scenarios

✅ Allowed:

Personal development and learning
Vibe coding and rapid prototyping
Technical exploration and experimentation
Personal projects and non-commercial applications

❌ Not allowed:

Production environments that are already live
Commercial products or services
End-user–facing applications
Abusive behavior such as pooling multiple accounts for round-robin usage

💡 Production recommendation

If your project is about to go live or is already commercialized, switch to the Pay-As-You-Go usage-based plan to get:

Higher SLA guarantees
More stable service quality
More flexible scalability
Professional commercial support

Step 1: Review plan details

Visit the ZenMux Pricing page to view detailed information and pricing for all subscription plans.

Select the plan that fits you on the Pricing page
Click the corresponding "Get Max" or "Get Ultra" button (Pro users click "Upgrade")
Complete the payment process

💡 Public beta capacity

Subscriptions are now available in public beta, with a total of 999 spots. Once spots are filled, new sign-ups will be temporarily closed—subscribe early to secure access.

Step 3: Manage your subscription and get an API Key

After subscribing, go to the Subscription management page:

📊 View usage
- Usage and remaining time in the current 5-hour window
- Cumulative usage stats for the current week
- Flow consumption breakdown
🔑 Get a subscription API Key
- Generate an API Key specifically for subscriptions
- Manage and rotate existing keys
- View the key’s last-used time
💳 Manage subscription
- View current plan information
- Upgrade or downgrade your plan
- View billing history

Extra Usage - Automatic Overages Fallback

When your subscription’s 5-hour window or weekly window quota is exhausted, Extra Usage can automatically switch to the Pay As You Go API Key you set, so you can continue seamlessly without being blocked by time-window limits. Once your subscription quota is restored, the system automatically switches back to subscription billing.

💡 Key Benefits

Seamless switching - Automatically switches to usage-based billing when quota runs out—no manual API Key changes
No workflow interruption - Does not affect your development, coding, or chat flows
Auto restore - Automatically switches back to subscription billing once your quota is restored
Flexible control - Enable or disable at any time

Setup Steps

Go to the Subscription management page and configure Extra Usage as follows:

Step 1: Enable Extra Usage

In the subscription management page, find the Extra Usage section and toggle the switch on the right to enable it.

Step 2: Select a Pay As You Go API Key

After toggling, a "Select a Key" dialog appears. You can:

Select an existing Pay As You Go API Key from the dropdown list
Or click "Create new key" to create a new usage-based API Key

After selecting, click "Select" to confirm.

Step 3: Done

After enabling, the page will show details for your selected Pay As You Go API Key, including:

API Key name and secret
Enablement status
Created time and last-used time
Current amount spent
Actions (you can reselect another key)

How It Works

Normal usage - Subscription quota (Flows) is used first
Quota exhausted - When the 5-hour window or weekly window reaches its limit, automatically switch to the configured Pay As You Go API Key
Usage-based billing - Calls are charged against your account balance
Auto restore - When the subscription quota window resets, automatically switch back to subscription billing

💡 Recommendations

Make sure your Pay As You Go account has sufficient balance to avoid service interruption after fallback switching due to insufficient funds
You can view Extra Usage usage and spend at any time from the subscription management page
To change the backup key, just click "Reselect" and choose again

⚠️ Billing notice

After you enable Extra Usage, when your subscription quota is exhausted, charges will be automatically deducted from your Pay As You Go balance. Monitor your balance to avoid unexpected costs.

Step 4: Use it in developer tools

After you obtain your subscription API Key, you can use it in various developer tools and applications.

Same usage as Pay As You Go

Using a subscription API Key is exactly the same as Pay As You Go: it works with the OpenAI SDK, Anthropic SDK, and direct HTTP calls. The only difference is that you use a subscription-specific API Key (starting with sk-ss-v1-), and usage is deducted from your subscription quota instead of your balance.

💡 API call examples

For complete API call examples, see the Quickstart. Just replace the API Key in the examples with your subscription API Key.

Integrate with mainstream developer tools

Subscription API Keys integrate seamlessly with popular AI coding tools and apps. For detailed configuration steps, see:

🔧 AI Coding Tools

Claude Code Integration Guide - Anthropic official CLI tool
CodeX Integration Guide - Intelligent code editor
Cline Integration Guide - VS Code AI assistant extension
VS Code Copilot Integration Guide - GitHub Copilot alternative
Neovate Integration Guide - Modern AI coding tool
OpenCode Integration Guide - Open-source AI code assistant

💬 Knowledge Management & Chat Tools

Cherry Studio Integration Guide - Desktop AI chat app
Obsidian Integration Guide - Knowledge management AI plugin
Sider Integration Guide - Browser sidebar AI assistant

🤖 AI Application Platforms

Dify Integration Guide - LLM application development platform
Open WebUI Integration Guide - Self-hosted AI chat UI

📚 More integrations

More integration guides are continuously being added. If you need help, visit our Discord community or contact technical support.

Using Subscriptions in Studio Chat

In addition to using your API Key in developer tools, you can also use your subscription quota directly in ZenMux Studio Chat (web) for conversations.

Switch billing mode

On the Studio Chat page, you can choose per conversation whether to use subscription quota or Pay As You Go balance.

As shown, you can find the Billing Mode option in conversation settings:

Subscription - Use subscription quota (Flows); does not consume account balance
Pay As You Go - Charges are deducted from your account balance based on actual usage

💡 Flexible switching

You can use different billing modes for different conversations. For example:

Daily development, learning, prototyping → use Subscription
Production testing, commercial validation → use Pay As You Go

You can switch between the two modes at any time. They don’t affect each other, so you can always pick the most suitable billing mode for each scenario.

⚠️ Shared quota

Studio Chat and API calls share the same subscription quota pool. Conversations in Studio Chat consume subscription Flows—plan your usage accordingly.

FAQ

What’s the difference between subscriptions and Pay As You Go?

Feature	Subscription (Builder Plan)	Pay-As-You-Go
Billing	Fixed monthly fee	Billed by actual usage
Best for	Personal dev, learning	Production, commercial apps
Cost predictability	✅ High (fixed monthly)	⚠️ Medium (varies with usage)
Rate limits	10–15 RPM	Higher; configurable
SLA	Standard	Higher
Price leverage	✅ 5–10×	Standard API pricing

When does quota reset?

5-hour window: Uses a rolling window mechanism, metered from when the request is sent; resets every 5 hours
Weekly limit: Metered from when the request is sent; resets every 7 days

You can view remaining quota and reset times in real time on the Subscription management page.

Can I use multiple plans at the same time?

No. One account can have only one active subscription plan at a time. If you need higher limits, upgrade to the Max or Ultra plan.

Next Steps

Now that you understand how Builder Plan subscriptions work, you can:

📚 Read the Quickstart to learn detailed API calling methods
🔧 See Best Practices to integrate your subscription API Key into developer tools
💰 Learn about Pay As You Go, the billing option for production
📊 Visit Usage Analytics to monitor subscription quota usage in real time
💵 Review Cost Analytics to learn how to optimize usage costs

If you encounter any issues while using the service, feel free to reach us via:

Official website: https://zenmux.ai
Support email: [email protected]
Business email: [email protected]
Twitter: @ZenMuxAI
Discord: https://discord.gg/vHZZzj84Bm

For more contact options and details, visit our Contact page.

Subscription Plans ​

What are Flows? ​

📖 What can the Pro plan ($20/month, 50 Flows/5h) actually do? ​

Why choose Builder Plan? ​

💡 Key Advantages ​

🚀 Three Core Values ​

Plan Comparison ​

Free - Try for Free ​

Pro - Best for Developers ​

Max - High-Intensity Development ​

Ultra - Professional Flagship ​

Usage Limits ​

Rate Limits ​

Applicable Scenarios ​

How to Subscribe ​

Step 1: Review plan details ​

Step 2: Choose a plan and subscribe ​

Step 3: Manage your subscription and get an API Key ​

Extra Usage - Automatic Overages Fallback ​

💡 Key Benefits ​

Setup Steps ​

How It Works ​

Step 4: Use it in developer tools ​

Same usage as Pay As You Go ​

Integrate with mainstream developer tools ​

Using Subscriptions in Studio Chat ​

Switch billing mode ​

FAQ ​

What’s the difference between subscriptions and Pay As You Go? ​

When does quota reset? ​

Can I use multiple plans at the same time? ​

Next Steps ​