Opus 4.8 vs Sonnet 5

Opus 4.8 vs Sonnet 5 compared on intelligence, speed, and cost. Try both models on Zo, the always-on AI computer that does real work for you.

Opus 4.8
Anthropic
vs
Sonnet 5
Anthropic

Intelligence

Tie
vs

Speed

Tie
Standard
vs
Standard

Cost

Sonnet 5 is cheaper
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

1M tokens
Context
1M tokens
Jan 2026
Knowledge
—
May 2026
Released
Jun 2026
$5.00/1M
Input
$3.00/1M
$25.00/1M
Output
$15.00/1M

Both Opus 4.8 and Sonnet 5 are available on Zo Computer. Try them both to see which one works best for your use case.

Learn more about Opus 4.8Learn more about Sonnet 5View all models on Zo
Opus 4.8 vs Sonnet 5 | Zo Computer