Migration assistant

Replacing Claude Opus 4.1?

Ranked replacement candidates, each shown with exactly what changes if you switch. Same-provider matches surface first because switching cost is lower; capability regressions are flagged in red.

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Migrating from

Claude Opus 4.1

Anthropic · Claude Opus 4 · Active
Input: $15/M Output: $75/M Context: 200K
View detail →
#1 RECOMMENDED

Claude Opus 4.5

Anthropic · Claude Opus 4
same provider; same family; 67% cheaper input; same context window
View full detail →
What changes if you switch
Field Claude Opus 4.1 Claude Opus 4.5 Impact
Input price $15/M $5/M Save 67%
Output price $75/M $25/M Save 67%
Context window 200K tokens 200K tokens Same capacity
Vision input ✓ supported ✓ supported Preserved
Function calling ✓ supported ✓ supported Preserved
Prompt caching ✓ supported ✓ supported Preserved
Lifecycle Active Active Same status
Other candidates
#2

Claude Opus 4.6

Anthropic
same provider; same family; 67% cheaper input; 1M context (larger)
Details →
Input price: Save 67%Output price: Save 67%Context window: +400% larger
#3

Claude Opus 4.7

Anthropic
same provider; same family; 67% cheaper input; 1M context (larger)
Details →
Input price: Save 67%Output price: Save 67%Context window: +400% larger
#4

Claude Opus 4

Anthropic
same provider; same family; same context window
Details →
#5

Claude Opus 4.8

Anthropic
same provider; same family; 67% cheaper input; 1M context (larger); loses 1 capability
Details →
Input price: Save 67%Output price: Save 67%Context window: +400% largerPrompt caching: LOST — re-evaluate before switching
Methodology

How candidates are ranked

Candidates are ranked by how much of the source model's profile each one preserves — weighing switching cost (same provider or model family surface first), capability parity (what you keep versus what you'd lose), context window, and pricing direction. A candidate that is itself deprecated is pushed down the list; one that's already retired is never recommended.

Ranking is purely algorithmic — no editorial weighting, no paid placement. Every value is pulled from each provider's own documentation; click any model name to see the source-linked detail.