You're About to Save a Lot of Money
Here's the thing — Claude 4 Opus was expensive. $15 per million input tokens, $75 per million output tokens. The new alternatives are dramatically cheaper:
| Model | Input / Output | vs Claude 4 Opus | Monthly (10M in + 2M out) |
|---|---|---|---|
| Claude 4 Opus (retired) | $15 / $75 | — | $300/mo |
| Claude Opus 4.8 | $5 / $25 | 67% cheaper | $100/mo |
| Claude Sonnet 4.6 | $3 / $15 | 80% cheaper | $60/mo |
| GPT-5 | $1.25 / $10 | 89% cheaper | $32.50/mo |
| Gemini 3.1 Pro | $2 / $12 | 85% cheaper | $44/mo |
| DeepSeek V4 Pro | $0.435 / $0.87 | 97% cheaper | $6.09/mo |
That's $2,400+/year in savings just by switching models. And the fix takes 60 seconds.
🚀 Get Your Personalized Migration Report
Enter your exact Claude 4 usage. See your custom cost comparison across 67 alternatives. Most developers save $60-200/month.
What About My API Keys and Data?
Your existing Anthropic API key still works with the new models. You don't need to:
- Generate a new API key
- Update your SDK version
- Change your authentication code
- Migrate your data or conversation history
You only need to change the model name string. Everything else stays the same.
Error Messages You Might Be Seeing
Depending on how your code handles errors, you might see one of these:
- HTTP 410 Gone — The model endpoint no longer exists
- "model_not_found" — The model ID isn't recognized
- "invalid_model_error" — You're using a deprecated model name
- "claude-4-opus has been deprecated" — Direct deprecation message
All of these have the same fix: change the model name.
Claude 4 → New Model Mapping
| Old Model Name | New Model Name | What Changed |
|---|---|---|
claude-4-opus |
claude-opus-4-8 |
67% cheaper, 5x context (1M) |
claude-4-opus-20250514 |
claude-opus-4-8 |
67% cheaper, 5x context (1M) |
claude-4-sonnet |
claude-sonnet-4-6 |
Same price, 5x context (1M) |
claude-4-sonnet-20250514 |
claude-sonnet-4-6 |
Same price, 5x context (1M) |
Looking to Switch Providers Entirely?
If you want to explore alternatives beyond Anthropic, here are the best options across providers:
- OpenAI GPT-5 — $1.25/$10 per 1M tokens. Great for general tasks.
- Google Gemini 3.1 Pro — $2/$12 per 1M tokens. 1M context window.
- DeepSeek V4 Pro — $0.435/$0.87 per 1M tokens. Budget king.
- Mistral Large — $2/$6 per 1M tokens. Strong European option.
Use our side-by-side comparison tool to see all 88 models compared.
📊 Save Even More with APIpulse
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Related Resources
- 🔴 Claude 4 Is Down — 5-Minute Migration Guide
- Claude 4 API Status — Live Checker
- Claude 4 Migration Cost Calculator
- Claude 4 Migration Hub — Complete Guide
- Claude 4 Alternatives by Use Case
- Claude 4 Shutdown Complete — What Happened
- Claude 4 Is Dead — What to Do Now
- Claude 4 Is Gone — Now What?
- What Replaced Claude 4? — Every Alternative
- Claude 4 Retired — Here's What to Do
- Claude 4 Migration FAQ — 25 Questions Answered
- AI API Cost Calculator — Compare All Models
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