Claude 4 Shutdown Survival Kit
⚠️ Your Claude 4 API calls are failing
Claude 4 Opus and Sonnet 4 were retired on June 15, 2026. All API calls now return HTTP 410 Gone errors. Here's how to fix it in 60 seconds.
The 60-Second Fix
Open your code and change the model ID. That's it. The API endpoint and authentication stay the same.
- model: "claude-4-opus" ← broken
+ model: "claude-opus-4-8" ← works now
- model: "claude-sonnet-4" ← broken
+ model: "claude-sonnet-4-6" ← works now
Or switch to a cheaper model entirely — see the table below.
5 Cheapest Alternatives
Ranked by total cost for 1M input + 1M output tokens:
| Model | Input / 1M | Output / 1M | Total Cost | Savings |
|---|---|---|---|---|
| Gemini 2.0 Flash | $0.10 | $0.40 | $0.50 | 99% cheaper |
| DeepSeek V4 Flash | $0.14 | $0.28 | $0.42 | 99% cheaper |
| GPT-4o mini | $0.15 | $0.60 | $0.75 | 99% cheaper |
| Claude Haiku 4.5 | $1.00 | $5.00 | $6.00 | 93% cheaper |
| GPT-5 | $1.25 | $10.00 | $11.25 | 87% cheaper |
Use the Savings Calculator to model your exact costs with each alternative based on your actual token usage.
Migration Steps
Update your model ID
Change claude-4-opus to claude-opus-4-8 (or a cheaper alternative from the table above).
Test with a few requests
Run a quick test to verify the new model works with your prompts. Quality should be similar or better.
Calculate your savings
Use the APIpulse calculator to see exactly how much you'll save with the new model.
Deploy to production
Push the change. Your app should work immediately with the new model.
💡 Want to save even more?
Most developers use the same model for everything. Route simple tasks (classification, summarization) to budget models like GPT-4o mini or Gemini Flash, and reserve premium models for complex reasoning. This saves an additional 40-60%.
Quick Links
- Savings Calculator — See exactly what you'd pay with each alternative
- Cost Audit — Find all your overpayment opportunities
- Model Finder — Answer 3 questions, get the cheapest model
- Migration Tool — Compare all 42 alternatives
- Cheat Sheet — The 60-second switch guide
- Full Calculator — Model any usage scenario
Stop Overpaying for AI APIs
Join developers who use APIpulse to find the cheapest model for every task. Free calculator, 42 models, instant results.
Try the Calculator — Free →You just switched models — now optimize the cost
Most developers use one model for everything. Pro shows you which tasks can use cheaper models — saving an additional 40-60% on top of your model switch.
- ✓ All cheaper alternatives ranked by savings
- ✓ Model routing guide — use cheap models for 80% of tasks
- ✓ Cost Efficiency Score with A-F grade
- ✓ Save & compare up to 10 cost scenarios
14-day money-back guarantee · Lifetime access
Need More Help?
- Complete Shutdown Guide — Full migration walkthrough with code examples
- Alternatives by Use Case — Best model for chatbots, coding, analysis, and more
- Migration Hub — Everything in one place: comparisons, calculators, and guides