Compare two models
Select any two models. Input, output, cached, and context rarely move together — the cheaper model on one line isn't always the cheaper one on the next.
Description
Multimodal model with Agent Swarm technology. Superseded by K2.6.
OpenAI's frontier model for complex professional workloads. 1M token context, text + image input, native computer use.
I/O price /1M
$0.6/$3.00
$5.00/$30.00
Input /1M
$0.6
$5.00
Output /1M
$3.00
$30.00
Cached in /1M
$0.1
$0.5
Context
256K
1M
Δ input since launch
—
—
Δ output since launch
—
—
Released
Jan 2026
Apr 2026
Status
legacy
—
Provider
Moonshot AI
OpenAI