GPT-5.5 vs Opus 4.8

GPT-5.5 vs Opus 4.8 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
Opus 4.8
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
Jan 2026
Apr 2026
Released
May 2026
$5.00/1M
Input
$5.00/1M
$30.00/1M
Output
$25.00/1M

Both GPT-5.5 and Opus 4.8 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 Opus 4.8View all models on Zo
GPT-5.5 vs Opus 4.8 | Zo Computer