What happened?

Another day another Kimi + Openrouter issue. The previous fix for developer vs system messages resolved one bug with using Kimi via Openrouter on Pi, but uncovered another.

When doing any thinking, Kimi 2.6 now throws the following error:

thinking is enabled but reasoning_content is missing in assistant tool call message

Setting the following in models.json fixes the issue

"compat": {
  "requiresReasoningContentOnAssistantMessages": true
}

Steps to reproduce

1. Setup Kimi K2.6 via openrouter (going direct to Moonshot provider)
2. Set any thinking level other than "off"
3. Get it to think
4. See error

Expected behavior

Kimi K2.6 via Openrouter should be able to think in Pi

Version

0.78.0