Claude 4 Migration Hub
Everything you need to migrate from Claude 4: 18 head-to-head comparisons, 67 alternatives, calculators, code snippets, and step-by-step guides.
⚡ Quick Picks — Top Replacements
Don't have time to compare all 39? Start here.
Claude Opus 4.8
DeepSeek V4 Pro
DeepSeek V4 Flash
📊 All 18 Head-to-Head Comparisons
Claude 4 Opus vs every major competitor. Claude 4 Sonnet vs every major competitor.
Claude 4 Opus Comparisons
Opus vs Opus 4.8
The path of least resistance. Same provider, same API key, one-line model name change.
Compare →Opus vs Sonnet 4.6
Drop from Opus to Sonnet tier. Same provider, bigger savings, slightly lower quality.
Compare →Opus vs GPT-5.5 Pro
OpenAI's best model vs Claude's best. Compare quality, speed, and pricing.
Compare →Opus vs Gemini 3.1 Pro
Google's latest with 1M context window. Strong coding and reasoning.
Compare →Opus 4.8 vs Gemini 2.5 Pro
Latest Anthropic premium vs proven Google mid-tier. Same 1M context.
Compare →Opus vs DeepSeek V4 Pro
Near-Claude quality at a fraction of the cost. The value champion.
Compare →Opus vs Llama 4 Maverick
Self-hostable open-source alternative. Full control, no vendor lock-in.
Compare →Opus vs Mistral Medium 3.5
European AI lab with strong coding models. GDPR-friendly option.
Compare →Claude 4 Sonnet Comparisons
Sonnet vs Sonnet 4.6
Same price, 5x context (1M vs 200K). Strict upgrade with zero cost increase.
Compare →Sonnet vs Opus 4.8
Worth the premium if you need maximum quality. The premium Anthropic option.
Compare →Sonnet vs Gemini 3.1 Pro
Google's latest with massive context. Strong alternative for coding tasks.
Compare →Sonnet vs DeepSeek V4 Pro
The biggest savings jump. Claude Sonnet quality at DeepSeek prices.
Compare →🛠️ Migration Tools
Calculate, compare, and migrate with our interactive tools.
All Claude 4 Alternatives Ranked
Every alternative ranked by price, quality, and ease. Real benchmarks, not opinions.
See Rankings →State of AI API Pricing — June 2026
88 models, 10 providers compared. Find the cheapest AI API after the Claude 4 shutdown.
Read Report →Deprecation Calculator
Enter your Claude 4 usage, see exact costs on every alternative.
Open Calculator →Migration Cheat Sheet
60-second switch guide. Quick picks, code changes, cost table.
View Cheat Sheet →Print-Ready Checklist
One-page printable checklist with model IDs, code snippets, and post-migration steps.
Print Checklist →Migration Advisor — 60 Seconds
Enter your spend, see your cheapest alternative instantly.
Find Cheapest →Replacement Finder — Interactive Quiz
Answer 3 questions, get a personalized replacement with code snippets.
Find My Replacement →Migration Scanner — Find Deprecated Code
Paste your code, find all Claude 4 references instantly. Shows exact fixes for your framework.
Scan My Code →Shutdown Survival Guide
Step-by-step guide: fix 410 errors in 5 minutes, compare alternatives, save 67-99%.
Get the Guide →Migration Command Center
Full dashboard with timelines, checklists, and progress tracking.
Open Dashboard →Migration Cost Calculator
Compare monthly costs across all providers with your exact usage.
Calculate Costs →Migration Cost Comparison — See Exact Savings
Compare 10 alternatives side-by-side. See exactly how much you'll save switching from Claude 4.
Calculate Savings →Full Comparison Table
All 10 alternatives side by side — pricing, context, migration difficulty.
Compare All →Best Claude 4 Replacement
Ranked comparison of every alternative — quality, price, migration ease.
See Ranked Comparison →📚 Guides & Articles
Step-by-step guides, checklists, and deep dives.
Enterprise Migration Playbook
SOC 2 compliance, data residency, vendor evaluation, team coordination, rollback plans, and zero-downtime strategy.
Get Playbook →Framework Migration Guide
Copy-paste code changes for LangChain, LlamaIndex, Vercel AI SDK, Anthropic SDK, CrewAI, Haystack.
Fix Your App →Weekend Migration Playbook
Step-by-step guide for developers discovering the shutdown this weekend. 20-30 min fix.
Start Migrating →Last-Chance Migration Guide
Days left. Exact code changes, cost savings (67-97%), and a 30-minute migration plan.
Read Guide →Final 48 Hours
Last chance. Emergency migration guide with 30-minute checklist and cost calculator.
Read Now →Full Migration Guide
Step-by-step guide with code samples, cost comparisons, and 67 alternatives.
Read Guide →Sonnet 4.6 Migration
One-line model ID change. Same price, 5x context. The fastest migration path.
Fix Now →Gemini Migration
Switch to Gemini 3.1 Pro. 87% cheaper, 1M context window, full code examples.
Migrate →GPT-5 Migration
Switch to GPT-5. 92% cheaper, largest ecosystem, 10-minute migration.
Migrate →Llama 4 Maverick Migration
Switch to Llama 4 Maverick. 98% cheaper, 1M context (5x Claude 4), open source.
Migrate →Mistral Migration
Switch to Mistral Medium 3.5. 90% cheaper, EU data sovereignty, GDPR compliant.
Migrate →Kimi K2.6 Migration
Switch to Kimi K2.6. 94% cheaper, 256K context, strong reasoning and Chinese support.
Migrate →Grok Migration
Switch to Grok 4.3. 92% cheaper, 1M context, real-time X/Twitter data, OpenAI-compatible SDK.
Migrate →Cohere Migration
Switch to Cohere Command A. 83% cheaper, native RAG, citation support, enterprise security.
Migrate →DeepSeek Migration
Switch to DeepSeek V4 Pro. 97% cheaper, 128K context, top reasoning benchmarks.
Migrate →Opus 4.8 Migration
Stay with Anthropic. Claude Opus 4.8 — 67% cheaper, same API, one-line model ID change.
Migrate →Migration Checklist
Day-by-day plan with code changes, cost comparisons, and a printable checklist.
Get Checklist →Shutdown Checklist: Complete Guide
Everything in one place: pre-shutdown prep, 410 error fix, migration code, cost comparison, 10 alternatives.
See Complete Guide →Shutdown Timeline: Every Date
Complete deprecation timeline from announcement to post-shutdown. Every milestone, every action item.
See Timeline →Claude 4 Is Gone — Now What?
The complete post-shutdown guide. 15+ alternatives ranked by cost, 3 migration strategies, savings up to 99%.
See Alternatives →Claude 4 Error Fix
Getting 410 errors? Model not found? Fix it in 60 seconds.
Fix Errors →Error Codes Complete Reference
Every Claude 4 API error code with exact JSON responses and fixes.
See All Errors →Survival Kit
One-line fix + 5 cheapest alternatives. Get back online in 60 seconds.
Survival Kit →410 Error Fix Guide
Language-specific fix with Python, Node.js, Go, Ruby, cURL code snippets.
Fix the 410 Error →API Status Monitor
Real-time Claude 4 API status — check if it's still working.
Check Status →Cheapest LLM APIs 2026
All 88 models ranked by price. Find the cheapest for your use case.
See Rankings →GPT-5 vs Claude Pricing
Head-to-head pricing of all 14 GPT-5 and Claude models.
Compare Pricing →Save Even More with APIpulse
You get personalized optimization recommendations that cut costs by 30-40% beyond model switching.
- Save & compare up to 10 migration scenarios
- Export migration cost reports for your team
- Get personalized optimization recommendations
- Priority email support during migration
- Early access to new pricing data
Explore Free Tools → Free Tools →
100% free · No signup required
No signup required. No questions asked.
Frequently Asked Questions
When was Claude 4 deprecated?
Claude 4 Opus and Claude Sonnet 4 were retired on June 15, 2026. API calls to these model IDs now return HTTP 410 Gone errors. You must migrate to a supported replacement.
What is the cheapest alternative to Claude 4 Opus?
DeepSeek V4 Flash is the cheapest at $0.14/$0.28 per million tokens — 99% cheaper than Claude 4 Opus ($15/$75). For similar quality, DeepSeek V4 Pro at $0.435/$0.87 is 97% cheaper. The direct Anthropic replacement, Claude Opus 4.8, is 67% cheaper at $5/$25.
Do I need a new API key to migrate from Claude 4?
No. If staying with Anthropic, your existing API key works with Claude Opus 4.8 and Sonnet 4.6. Only the model name string in your code changes. If switching providers, you'll need a new API key from the new provider.
How do I migrate from Claude 4 to another model?
Change one line of code: replace the model name string (e.g., 'claude-4-opus' → 'claude-opus-4-8'). Your API key, SDK, and endpoint stay the same. The entire migration takes under 5 minutes for most codebases.
It's after June 15 — what happens now?
All API calls to claude-4-opus and claude-sonnet-4 model IDs now return HTTP 410 Gone errors. Your application has stopped working until you update the model name. There is no grace period.
How much can I save by switching from Claude 4?
Savings range from 67% (Claude Opus 4.8) to 99% (DeepSeek V4 Flash). For a typical workload of 10M input + 2M output tokens/month, Claude 4 Opus costs $300/month. The same workload on Claude Opus 4.8 costs $100/month, and on DeepSeek V4 Pro it costs just $6.09/month.
Get the Claude 4 Migration Checklist
Step-by-step guide with code samples, cost comparisons, and a deadline tracker. Free, no spam.
Don't wait until your code breaks.
Migrate now while you have time to test. Most teams complete the switch in under an hour.
Start Your Migration →