Claude 4 Shutdown: Complete Developer Toolkit
Everything you need in one place: quick fix code, 10 alternatives ranked by cost, language-specific migration guides, interactive cost calculator, and step-by-step checklist.
⚡ Quick Fix — Change One Line
Claude 4 Opus and Sonnet were retired on June 15, 2026. API calls return 410 Gone. The fix: change the model name. Same API key, same SDK, same endpoint.
model: "claude-4-opus"
model: "claude-opus-4-8"
💡 67% cheaper with Claude Opus 4.8. Or save up to 97% by switching providers — see alternatives below.
📊 10 Alternatives Ranked by Cost
Every alternative to Claude 4 Opus, ranked by total monthly cost. Use our Cost Calculator to find the cheapest model for YOUR specific token usage.
| Model | Provider | Input / Output (per 1M tokens) | vs Claude 4 Opus ($15/$75) | Migration |
|---|---|---|---|---|
| Claude Opus 4.8 DROP-IN | Anthropic | $5.00 / $25.00 | 67% cheaper | Change model name only |
| Claude Sonnet 4.6 DROP-IN | Anthropic | $3.00 / $15.00 | 80% cheaper | Change model name only |
| GPT-5 POPULAR | OpenAI | $2.50 / $10.00 | 87% cheaper | New API key + model name |
| Gemini 2.5 Pro | $1.25 / $5.00 | 93% cheaper | New API key + model name | |
| DeepSeek V4 Pro BEST VALUE | DeepSeek | $0.44 / $0.87 | 97% cheaper | New API key + base URL |
| Llama 4 Maverick | Meta (via providers) | $0.20 / $0.40 | 98% cheaper | New API key + base URL |
| Mistral Large 2 | Mistral | $2.00 / $6.00 | 92% cheaper | New API key + base URL |
| Grok 3 | xAI | $3.00 / $15.00 | 80% cheaper | New API key + base URL |
| Cohere Command R+ | Cohere | $2.50 / $10.00 | 87% cheaper | New API key + SDK |
| DeepSeek V4 Flash CHEAPEST | DeepSeek | $0.14 / $0.28 | 99% cheaper | New API key + base URL |
💡 Drop-in = same API key, same SDK, just change model name. Popular = most widely used alternative. Best Value = best quality-to-price ratio.
📝 Language-Specific Migration Guides
Find your language below. Each guide shows the exact code change needed. For detailed code snippets, see our 410 Error Fix Guide.
Python
Change model="claude-4-opus" to model="claude-opus-4-8" in your Anthropic Python client.
Node.js
Change model: 'claude-4-opus' to model: 'claude-opus-4-8' in your SDK call.
cURL
Change "model": "claude-4-opus" to "model": "claude-opus-4-8" in your request body.
Search Your Codebase
Run grep commands to find every instance of the old model IDs in your project.
See Search Commands →✅ Step-by-Step Migration Checklist
Follow this checklist to migrate from Claude 4 to a working alternative:
🧮 Calculate Your Exact Savings
Don't guess. Use our interactive calculator to find the cheapest model for YOUR specific token usage. Enter your monthly input/output tokens and see exact costs for all 42 models.
Interactive Cost Calculator
Compare costs across 42 models from 10 providers. See exactly how much you'd save.
Open Calculator →Free · No signup required · 42 models · 10 providers
📋 Model ID Reference
Complete mapping from old Claude 4 model IDs to new ones:
| Old Model ID (Retired) | New Model ID (Anthropic) | New Model ID (Cheapest) |
|---|---|---|
claude-4-opus |
claude-opus-4-8 |
deepseek-v4-pro |
claude-4-opus-20250615 |
claude-opus-4-8 |
deepseek-v4-pro |
claude-sonnet-4 |
claude-sonnet-4-6 |
deepseek-v4-flash |
claude-sonnet-4-20250514 |
claude-sonnet-4-6 |
deepseek-v4-flash |
claude-4-haiku |
claude-haiku-4-5 |
deepseek-v4-flash |
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