Kay 1.4 is here

Kay 1.4 is our latest generation of intelligence across every tier. You’ll see stronger reasoning, coding, and long-running agent work, all inside the workspace you already use.

#Existing conversations upgrade automatically

Open an earlier Kay conversation and it continues on the equivalent upgraded tier. Your history, files, tools, and memory remain in place, so there’s nothing to migrate yourself.

#The same range, now more capable

The Kay family still spans quick everyday work through frontier intelligence for the hardest problems. Pick the pace and capability you need; every tier benefits from the upgrade.

#How to choose the right Kay tier

For the best balance of capability, speed, and credit usage, we recommend:

• Kay — the recommended default for most tasks.
• Kay Nano — ideal for time-sensitive work where speed and efficient credit usage matter most.
• Kay Pro — suited to complex tasks that benefit from deeper reasoning.
• Kay Max — reserved for the most demanding work, when the highest level of capability justifies higher credit usage, or when another tier cannot make progress.