📋 PRINT-READY CHEAT SHEET

Claude 4 Migration Checklist

Everything you need to fix your 410 errors and migrate to a cheaper alternative — in one page.

Last updated: July 7, 2026 82 models · 10 providers Save: Ctrl+P / ⌘+P

⚡ Quick Fix (2 Minutes)

If you just need to get back online fast, change your model ID and redeploy:

Find your Claude 4 model IDs — Search your codebase for: claude-4-opus, claude-sonnet-4
Replace with new model ID — See table below
Update base_url (only if switching providers)
Test locally — Make one API call to verify
Deploy — Push to production

🔄 Model ID Reference

Old ID (Dead)	New ID (Live)	Provider	Price (In/Out per 1M)	Savings
claude-4-opus-20250615	claude-opus-4-8	Anthropic	$5.00 / $25.00	67%
claude-4-opus	claude-sonnet-4-6	Anthropic	$3.00 / $15.00	80%
claude-sonnet-4-20250514	gpt-5	OpenAI	$1.25 / $10.00	92%
claude-sonnet-4	gemini-2.5-pro	Google	$1.25 / $10.00	90%
	deepseek-v4-pro	DeepSeek	$0.44 / $0.87	97%
	deepseek-v4-flash	DeepSeek	$0.14 / $0.28	99%

💻 Code Snippets (Copy-Paste)

Anthropic — Same API Key, Same SDK

// Just change the model name. That's it.
- model: "claude-4-opus-20250615"
+ model: "claude-opus-4-8"

// Or for Sonnet:
- model: "claude-sonnet-4-20250514"
+ model: "claude-sonnet-4-6"

OpenAI — New API Key Required

// Get key from platform.openai.com
- model: "claude-4-opus-20250615"
+ model: "gpt-5"
- base_url: "https://api.anthropic.com/v1"
+ base_url: "https://api.openai.com/v1"

DeepSeek — Cheapest Option (97% Savings)

// Get key from platform.deepseek.com
- model: "claude-4-opus-20250615"
+ model: "deepseek-v4-pro"
- base_url: "https://api.anthropic.com/v1"
+ base_url: "https://api.deepseek.com/v1"

🔧 Framework Quick Fixes

Framework	What to Change
LangChain	`ChatAnthropic(model="claude-opus-4-8")`
LlamaIndex	`Anthropic(model="claude-opus-4-8")`
Vercel AI SDK	`import { anthropic } from '@ai-sdk/anthropic'` — no model change needed
Anthropic SDK	`client.messages.create({ model: "claude-opus-4-8" })`
OpenAI SDK	Change `base_url` + model name
CrewAI	`Agent(llm={"model": "claude-opus-4-8"})`

✅ Post-Migration Checklist

Test with real prompts — Run your actual workload, not just "hello world"
Check output quality — Compare responses side-by-side if possible
Update rate limits — Different providers have different limits
Monitor costs — Check your first week's spend matches expectations
Update error handling — Different providers return different error codes
Remove old Claude 4 references — Clean up config files, env vars, documentation
Notify your team — Make sure everyone knows about the model change

🤔 Which Provider Should You Pick?

Stay with Anthropic if:

• You need the same API key
• You want zero code changes beyond model name
• Quality is more important than cost
• You use Claude-specific features (tool use, etc.)

Switch to DeepSeek if:

• Cost is your #1 priority
• You're okay with a different API format
• You need high volume at low cost
• You can handle slightly different behavior

Switch to OpenAI/Google if:

• You already have their API keys
• You need multimodal (vision, audio)
• You want the largest ecosystem
• You use their other services (Azure, GCP)

Use multiple providers if:

• You want redundancy (no single point of failure)
• Different models for different tasks
• You're optimizing for cost per task type
• You want to hedge against future shutdowns

Need Help Choosing?

Use our free tools to find the cheapest model for YOUR specific usage:

Migration Advisor — 60 Seconds Full Calculator — 59 Models Model Deprecation Checker

All tools are free for saved scenarios, cost reports, and optimization tips.

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