GPT-5.5 vs Sonnet 4.6

GPT-5.5 vs Sonnet 4.6 compared on intelligence, speed, and cost. Try both models on Zo, the always-on AI computer that does real work for you.

GPT-5.5
OpenAI
vs
Sonnet 4.6
Anthropic

Intelligence

Tie
vs

Speed

Tie
Standard
vs
Standard

Cost

Tie
vs

How to read this

Intelligence comes from SWE-bench Verified, the coding benchmark used by the model picker. Speed means the model is fast enough for the picker threshold. Cost shows the relative tier across Zo models: green is cheaper, amber is pricier.

Model details

1.1M tokens
Context
1M tokens
Dec 2025
Knowledge
Aug 2025
Apr 2026
Released
Feb 2026
$5.00/1M
Input
$3.00/1M
$30.00/1M
Output
$15.00/1M

Both GPT-5.5 and Sonnet 4.6 are available on Zo Computer. Try them both to see which one works best for your use case.

Learn more about GPT-5.5Learn more about Sonnet 4.6View all models on Zo
GPT-5.5 vs Sonnet 4.6 | Zo Computer