⚠️ Claude 4 Migration Command Center
Claude 4 Opus & Sonnet 4 retire June 15, 2026 — everything you need to migrate in one page
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Claude 4 has been deprecated
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Days Left
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67-99%
Savings Range
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1 Line
Code Change
📊
39
Alternatives
⚡ Quick Switch — What to Use Instead
The 4 most common migration paths. Pick the one that fits your situation.
Claude 4 Opus →
↓
Claude Opus 4.8
Save 67% — $5/$25 vs $15/$75 per 1M tokens
Same provider. Same API key. Same SDK. 5× context (1M vs 200K). Just change the model string.
Recommended
Claude Sonnet 4 →
↓
Claude Sonnet 4.6
Same price, 5× context upgrade
$3/$15 per 1M tokens. Context: 200K → 1M. Zero-risk migration — same price, better model.
Claude 4 Opus (budget) →
↓
DeepSeek V4 Pro
Save 97% — $0.435/$0.87 per 1M tokens
1M context. Requires new API key from DeepSeek. Supports OpenAI SDK format. Best bang for buck.
Claude 4 Opus (quality) →
↓
GPT-5
Save 87% — $1.25/$10 per 1M tokens
272K context. Requires OpenAI API key. Excellent reasoning. Strong alternative for complex tasks.
🧮 Savings Calculator
Enter your current Claude 4 usage to see exactly how much you'll save with each alternative.
💻 Exact Code Changes
Copy-paste these changes. If staying with Anthropic, your API key and SDK don't change.
# Python — Anthropic SDK (pip install anthropic)
client = anthropic.Anthropic()
# BEFORE (retiring June 15):
response = client.messages.create(
model="claude-4-opus-20250514",
max_tokens=1024,
messages=[{"role": "user", "content": "Hello"}]
)
# AFTER — Claude Opus 4.8 (recommended):
response = client.messages.create(
model="claude-opus-4-8-20260115",
max_tokens=1024,
messages=[{"role": "user", "content": "Hello"}]
)
# OR — Claude Sonnet 4.6 (if you used Sonnet 4):
response = client.messages.create(
model="claude-sonnet-4-6-20260115",
max_tokens=1024,
messages=[{"role": "user", "content": "Hello"}]
)
// JavaScript — Anthropic SDK (npm install @anthropic-ai/sdk)
const anthropic = new Anthropic();
// BEFORE (retiring June 15):
const response = await anthropic.messages.create({
model: "claude-4-opus-20250514",
max_tokens: 1024,
messages: [{ role: "user", content: "Hello" }]
});
// AFTER — Claude Opus 4.8 (recommended):
const response = await anthropic.messages.create({
model: "claude-opus-4-8-20260115",
max_tokens: 1024,
messages: [{ role: "user", content: "Hello" }]
});
# cURL — Anthropic API
# BEFORE:
curl https://api.anthropic.com/v1/messages \
-H "x-api-key: $ANTHROPIC_API_KEY" \
-H "content-type: application/json" \
-d '{
"model": "claude-4-opus-20250514",
"max_tokens": 1024,
"messages": [{"role":"user","content":"Hello"}]
}'
# AFTER:
curl https://api.anthropic.com/v1/messages \
-H "x-api-key: $ANTHROPIC_API_KEY" \
-H "content-type: application/json" \
-d '{
"model": "claude-opus-4-8-20260115",
"max_tokens": 1024,
"messages": [{"role":"user","content":"Hello"}]
}'
# DeepSeek — OpenAI-compatible SDK (pip install openai)
# Get API key at: https://platform.deepseek.com
client = openai.OpenAI(
api_key="your-deepseek-api-key",
base_url="https://api.deepseek.com/v1"
)
response = client.chat.completions.create(
model="deepseek-v4-pro",
max_tokens=1024,
messages=[{"role": "user", "content": "Hello"}]
)
# Cost: $0.435 input / $0.87 output per 1M tokens
# That's 97% cheaper than Claude 4 Opus
# OpenAI — GPT-5 (pip install openai)
client = openai.OpenAI() # uses OPENAI_API_KEY env var
response = client.chat.completions.create(
model="gpt-5",
max_tokens=1024,
messages=[{"role": "user", "content": "Hello"}]
)
# Cost: $1.25 input / $10 output per 1M tokens
# That's 87% cheaper than Claude 4 Opus
🌳 Decision Tree — Which Alternative?
Click the question that best describes your situation.
▶ 🔒 "I want to stay with Anthropic — same API key, same SDK"
Use Claude Opus 4.8 (for Opus users) or Claude Sonnet 4.6 (for Sonnet users). Just change the model string — it's a 1-line code change. Opus 4.8 is 67% cheaper with 5× context. Sonnet 4.6 is same price with 5× context. Zero risk, zero new accounts.
▶ 💰 "I want the absolute cheapest option"
Use DeepSeek V4 Pro ($0.435/$0.87 per 1M tokens). That's 97% cheaper than Claude 4 Opus. 1M context window. Requires a new API key from DeepSeek. Supports the OpenAI SDK format, so migration is straightforward. See comparison →
▶ ⚖️ "I want the best quality-to-price ratio"
Use GPT-5 ($1.25/$10) or Gemini 2.5 Pro ($1.25/$10). Both are 87% cheaper than Claude 4 Opus with strong reasoning capabilities. GPT-5 has 272K context, Gemini has 1M. Both require separate API keys.
▶ 🏃 "I need to migrate TODAY with zero risk"
Use Claude Sonnet 4.6. Same price as Sonnet 4 ($3/$15), same API key, same SDK. Just change one string. 5× context upgrade. If you're an Opus user, Claude Opus 4.8 is equally safe — same provider, same key, just cheaper.
▶ 🤖 "I use Claude for code generation / agentic tasks"
Use Claude Opus 4.8 or GPT-5. Both excel at complex reasoning and code generation. Opus 4.8 has 1M context for large codebases. GPT-5 is 87% cheaper. For agentic workflows, the larger context window of Opus 4.8 (1M) may be worth the premium.
▶ 📝 "I use Claude for writing / summarization"
Use Claude Sonnet 4.6 or GPT-5. Both handle writing tasks well. Sonnet 4.6 is $3/$15 (same as Sonnet 4), GPT-5 is $1.25/$10. For high-volume writing, consider DeepSeek V4 Flash at $0.14/$0.28 — 99% cheaper.
▶ 🌐 "I want to diversify across multiple providers"
Smart move. Use Claude Opus 4.8 for complex tasks, GPT-5 for general reasoning, and DeepSeek V4 Pro for high-volume/low-cost work. This gives you redundancy and cost optimization. Use our Decision Tree tool →
✅ Migration Checklist
Check off each step as you complete it. Your progress is saved in your browser.
📊 All 39 Alternatives — Cost Comparison
Every available model compared to Claude 4 Opus. Prices per 1M tokens.
| Model | Provider | Input | Output | Context | Savings |
|---|
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