# Model Updates

[google/gemini-3.1-pro-preview](/content/google/gemini-3.1-pro-preview/index.html), [anthropic/claude-sonnet-4.6](/content/anthropic/claude-sonnet-4.6), [google/gemini-3-pro-image-preview](/content/google/gemini-3-pro-image-preview/index.html) are Now Live.

## Retirement Notices

- **Claude Sonnet 4** will be retired by both providers: AWS Bedrock and Anthropic on June 14, 2026. We recommend upgrading to [Claude Sonnet 4.6](/content/anthropic/claude-sonnet-4.6).

- **Claude Opus 4** will be retired by both providers: AWS Bedrock on May 31, 2026 and Anthropic on June 14, 2026. We recommend upgrading to [Claude Opus 4.7](/content/anthropic/claude-opus-4.7).

- **Qwen3 Max Thinking Preview** will be deprecated and removed on April 24, 2026. We recommend upgrading to [Qwen3-Max-Thinking](/content/qwen/qwen3-max/index.html).

- **gpt-5-chat** will be deprecated and removed on May 15, 2026.

- **Claude 3.7 Sonnet** will be retired by both providers: AWS Bedrock on April 28, 2026, and Google Cloud Vertex AI on May 11, 2026. We recommend upgrading to [Claude Sonnet 4.6](/content/anthropic/claude-sonnet-4.6).

## Promotions

Get [5% off service fee](/content/platform/pay-as-you-go?from=topflag/index.html) on top-up, and exclusive gifts for [referring friends](/content/pricing/overview#/index.html).

## Billing Anomaly

A billing anomaly was identified. Affected users will receive compensation. [Read more](/content/blog/billing-anomaly-notice-and-compensation/index.html).

# Subscription Plans

## ZenMux Builder Plan

From $20/ month
- 100+ top AI models at your fingertips
- Vibe Coding + Image / Video Generation + Chat all in one
- Works with ClaudeCode / Codex / OpenClaw etc.
- AI Insurance compensation

Ideal for: Personal development, Vibe Coding, learning, non-production testing.

## Pay As You Go

Usage-based billing. Pay what you use.
- No Rate Limit, high concurrency support
- Production-grade stability
- Token-level precise billing, cost control
- AI Insurance compensation

Ideal for: Production environments, commercial products, enterprise applications.

## Detailed Comparison

| Feature               | ZenMux Builder Plan       | Pay As You Go                  |
|----------------------|---------------------------|---------------------------------|
| Billing Model        | Fixed monthly fee         | Pay per actual usage          |
| Best For             | Personal dev, learning    | Production, commercial products |
| Rate Limit           | 10-15 RPM                 | Unlimited                      |
| Concurrency          | Weekly quota cap          | Unlimited                      |
| Stability            | Standard                  | Production-grade stability      |
| AI Insurance         | Auto Compensation          | Auto Compensation               |
| Cost Predictability   | High (fixed fee)         | Medium (usage-based)           |
| Top-up Bonus         | -                         | +10% Credits                   |
| Production Use       | Prohibited                | Recommended                     |

## Tips
- Use both plans together! Subscription and PAYG API Keys are completely independent.
- Use Subscription during development, switch to PAYG when going live — seamless transition.

## Ready to Get Started?
Get ZenMux Builder Plan Now or Top Up Now!

## FAQs
- Can I use PAYG credits to purchase a subscription?  
- Can I use both plans simultaneously?