Still Getting Claude 410 Errors? Here's Your 5-Minute Fix
If you're reading this, your code is probably broken right now. Claude 4 Opus and Sonnet 4 were retired on June 15, 2026. Every API call to these models returns HTTP 410 Gone. Your app is throwing errors, your users are affected, and you need a fix.
Good news: it takes 5 minutes to fix. Here's exactly what to do.
What the Error Looks Like
If you're seeing this in your logs, you're affected:
HTTP/1.1 410 Gone
Content-Type: application/json
{
"error": {
"type": "gone",
"message": "The model 'claude-4-opus-20250615' has been retired.
Please migrate to claude-opus-4-8 or visit
https://anthropic.com/models for alternatives."
}
}
This error is permanent. Claude 4 is not coming back. You need to update your code.
⚡ The 2-Line Fix (Staying with Anthropic)
If you want to stay with Anthropic, this is the fastest path. Same API key, same SDK, same everything. Just change the model name:
model = "claude-4-opus-20250615"
model = "claude-opus-4-8"
That's it. Redeploy and you're done. Claude Opus 4.8 is 67% cheaper with better performance.
Complete Fix by Language
Here's the exact code change for each language. Pick yours:
Python (Anthropic SDK)
client = anthropic.Anthropic()
response = client.messages.create(
model="claude-4-opus-20250615",
...
)
client = anthropic.Anthropic()
response = client.messages.create(
model="claude-opus-4-8", # ← changed
...
)
Node.js (Anthropic SDK)
const message = await anthropic.messages.create({
model: 'claude-4-opus-20250615',
...
});
const message = await anthropic.messages.create({
model: 'claude-opus-4-8', // ← changed
...
});
cURL
curl https://api.anthropic.com/v1/messages \
-H "x-api-key: $ANTHROPIC_API_KEY" \
-d '{"model": "claude-4-opus-20250615", ...}'
curl https://api.anthropic.com/v1/messages \
-H "x-api-key: $ANTHROPIC_API_KEY" \
-d '{"model": "claude-opus-4-8", ...}'
Want to Save Even More? (67-99% Cheaper)
Switching to Opus 4.8 saves 67%. But if you're open to switching providers, you can save up to 99%:
To switch to DeepSeek (Python):
# pip install openai
from openai import OpenAI
client = OpenAI(
base_url="https://api.deepseek.com/v1",
api_key="sk-your-deepseek-key"
)
response = client.chat.completions.create(
model="deepseek-v4-pro",
messages=[{"role": "user", "content": "Hello"}]
)
💡 Get a DeepSeek API key at platform.deepseek.com — free tier available.
Complete Model ID Reference
Here are all the model IDs you need. Bookmark this:
5 Common Migration Mistakes to Avoid
- Forgetting hidden config files. Check environment variables, YAML configs, JSON files, and CI/CD pipelines — not just your main codebase. 25% of migration issues come from forgotten config files.
- Not testing with real traffic. Deploy to staging first. Some providers have different rate limits, token counting, or streaming behavior.
- Assuming identical quality. DeepSeek V4 Pro handles 90% of tasks well but struggles with complex multi-step reasoning. Test with YOUR actual use case.
- Forgetting to update monitoring. If you have alerts for Claude 4 errors, update them for the new model. Otherwise you'll miss real issues.
- Not checking token counting. Different providers count tokens differently. A "10M token" workload on Claude might be 12M on DeepSeek. Monitor your first week's costs.
Need Help Choosing the Right Alternative?
The free guide shows you the options. Pro shows you the right one for YOUR code.
Tell Pro your current model and monthly spend — it'll show you the exact model, provider, and cost for YOUR workload. Save 10 scenarios, export PDF reports, get priority support.
Get Your Migration Plan — $2914-day money-back guarantee · Instant access · No subscription — ever
More Migration Resources
Questions? Email support@getapipulse.com or use the Migration Scanner to find all deprecated references in your code.