Claude 4 Opus & Sonnet 4 retire June 15, 2026 — -- days left
Don't let Claude 4 break your app
Get the free migration checklist with exact code changes, cost comparisons, and a step-by-step plan to switch before June 15.
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What's in the checklist:
- Before You Start
- Identify all Claude 4 references in your codebase (grep commands included)
- Choose your replacement model (decision guide for every use case)
- Estimate your cost savings with each alternative
- The Migration
- Exact code changes for Python (Anthropic SDK)
- Exact code changes for JavaScript/Node.js
- Exact code changes for curl/REST API
- How to switch providers (if going to DeepSeek, OpenAI, or Google)
- After Migration
- Testing checklist to verify your migration works
- Cost monitoring setup to track actual vs. expected savings
- Rollback plan if something goes wrong
Quick comparison (per 1M tokens):
| Model | Input | Output | Savings |
|---|---|---|---|
| Claude 4 Opus (retiring) | $15.00 | $75.00 | — |
| Claude Opus 4.8 | $5.00 | $25.00 | -67% |
| GPT-5 | $1.25 | $10.00 | -87% |
| DeepSeek V4 Pro | $0.435 | $0.87 | -97% |
Get the checklist before June 15
It takes 2 minutes to read and could save you hours of debugging when Claude 4 stops working.
More Claude 4 migration resources: