Migration assistant

Replacing o3-pro?

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.

OP
Migrating from

o3-pro

OpenAI · o-series · Active
Input: $20/M Output: $80/M Context: 200K
View detail →
#1 RECOMMENDED

GPT-4.1 Mini

OpenAI · GPT-4.1
same provider; 98% cheaper input; 1M context (larger)
View full detail →
What changes if you switch
Field o3-pro GPT-4.1 Mini Impact
Input price $20/M $0.4/M Save 98%
Output price $80/M $1.6/M Save 98%
Context window 200K tokens 1M tokens +424% larger
Vision input ✓ supported ✓ supported Preserved
Function calling ✓ supported ✓ supported Preserved
Structured output (JSON) ✓ supported ✓ supported Preserved
Lifecycle Active Active Same status
Other candidates
#2

GPT-4.1 Nano

OpenAI
same provider; 100% cheaper input; 1M context (larger)
Details →
Input price: Save 100%Output price: Save 100%Context window: +424% larger
#3

GPT-5 Mini

OpenAI
same provider; 99% cheaper input; 400K context (larger)
Details →
Input price: Save 99%Output price: Save 98%Context window: +100% larger
#4

GPT-5 Nano

OpenAI
same provider; 100% cheaper input; 400K context (larger)
Details →
Input price: Save 100%Output price: Save 100%Context window: +100% larger
#5

GPT-5.4 Mini

OpenAI
same provider; 96% cheaper input; 400K context (larger)
Details →
Input price: Save 96%Output price: Save 94%Context window: +100% larger
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.