Description

Using GPT 5.2 via api, with reasoning high.

After about 1 hour of usage, I hit

{"type":"error","sequence_number":2,"error":{"type":"invalid_request_error","code":"context_length_exceeded","message":"Your input exceeds the context window of this model. Please adjust your input and try again.","param":"input"}}

On the right panel I see

Context
270,593 tokens
68% used
$5.13 spent

I noticed that context keeps going up, then down, which from what I read, its intended.
However, maybe its not counted correctly, because GPT 5.2 limit via api is 400k not 270k.

/compact works, then I can proceed, so this is just a report on the incorrect count and limit.

Thanks

OpenCode version

v1.0.193

Steps to reproduce

Just use normally with gpt 5.2 high.

Screenshot and/or share link

No response

Operating System

Ubuntu Server

Terminal

No response