Claude 4 Dies June 15.
Your API Calls Will Fail.
Claude 4 Opus and Sonnet 4 are being permanently retired. If you're still using them, here's exactly what to do — in 30 seconds.
Calculate My Savings ↓⚠️ What Breaks on June 15
✅ These Keep Working
Your API key still works — only the model name changes.
How Much Will You Save?
Enter your monthly usage. See exact savings in 2 seconds.
Migrate in 30 Seconds
Find & Replace the Model Name
One line change. Your API key, SDK, and endpoint stay the same.
model: "claude-4-opus"
// After (works now, 67% cheaper)
model: "claude-opus-4-8"
Test Your Integration
Send a test request. Claude Opus 4.8 uses the same API format — no code changes needed beyond the model name.
Deploy Before June 15
That's it. You're migrated. Your costs just dropped 67-97%.
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Pro users get personalized model routing strategies, saved cost scenarios, and exportable reports. Your migration savings pay for Pro on day one.
- Personalized model recommendations for your workload
- Save and compare up to 10 cost scenarios
- Export professional cost reports for your team
- Priority support during migration
- Lifetime access — one payment, no subscription
14-day money-back guarantee. No questions asked.
Common Questions
What exactly happens on June 15?
API calls to claude-4-opus and claude-sonnet-4 will return HTTP 410 Gone errors. Your API key, SDK, and account all still work — you just need to use the new model names.
Do I need a new API key?
No. If staying with Anthropic, your existing key works with Claude Opus 4.8 and Sonnet 4.6. Only the model name string changes. If switching to DeepSeek, Mistral, or others, you'll need a key from that provider.
What's the fastest migration path?
Change claude-4-opus to claude-opus-4-8. Same provider, same API key, same SDK. 67% cheaper. 30 seconds.
What if I want to switch providers?
DeepSeek V4 Pro is 97% cheaper than Claude 4 Opus with similar quality. Mistral Large is 93% cheaper. GPT-5 is comparable at $1.25/$5. All use standard REST APIs — migration takes about 15 minutes.
Will Claude Sonnet 4.6 cost more?
No. Same price ($3/$15 per 1M tokens) but with 5x the context window (1M vs 200K) and improved reasoning. It's a strict upgrade.
Can I still migrate after June 15?
Yes, but your code will break until you do. Migrating now means zero downtime. Migrating after means debugging production errors.