🔴 Claude 4 is officially dead
As of June 15, 2026, all API calls to Claude 4 Opus and Claude Sonnet 4 return HTTP 410 Gone errors. Your code is broken. Here's how to fix it.
What Happened
Anthropic retired two of their most popular AI models on June 15, 2026:
- Claude 4 Opus — their flagship reasoning model ($15/$75 per 1M tokens)
- Claude Sonnet 4 — their balanced performance model ($3/$15 per 1M tokens)
Both models have been replaced by newer versions with better performance and lower prices. But if your code still references the old model IDs, it's broken right now.
How to Fix Your App (5 Minutes)
✅ The 1-Line Fix
Change your model ID. That's it. Same API key, same SDK, same endpoint.
If you were using Claude 4 Opus:
// Before (retired):
model = "claude-4-opus-20250514"
// After (recommended):
model = "claude-opus-4-8-20260115"
If you were using Claude Sonnet 4:
// Before (retired):
model = "claude-sonnet-4-20250514"
// After (recommended):
model = "claude-sonnet-4-6-20260115"
Cheapest Alternatives (Save 67-97%)
Staying with Anthropic is the easiest fix, but it's not the cheapest. Here are your options ranked by cost:
| Model | Provider | Input / 1M | Output / 1M | Savings vs Claude 4 Opus |
|---|---|---|---|---|
| DeepSeek V4 Flash | DeepSeek | $0.14 | $0.28 | 99% cheaper |
| DeepSeek V4 Pro | DeepSeek | $0.44 | $0.87 | 97% cheaper |
| GPT-5 mini | OpenAI | $0.25 | $2.00 | 96% cheaper |
| Gemini 2.5 Pro | $1.25 | $10.00 | 87% cheaper | |
| Claude Opus 4.8 | Anthropic | $5.00 | $25.00 | 67% cheaper |
See all 42 alternatives compared →
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