v0.52.50 v0.52.51

Name: catwalk
Author: charmbracelet

medium risk

charmbracelet/catwalkSep 22, 2026 → Sep 22, 20260 days between releases

What's New

Adds new AI models (Claude Opus 5.5, GPT-6) and removes deprecated GPT-oss-120b

Breaking Changes

Removal of deprecated GPT-oss-120b model

New Features

Support for Claude Opus 5.5 model
Support for GPT-6 Sol model
Support for GPT-6 Luna model
DeepSeek v4.1 Flash attachment support

Improvements

Updates DeepSeek v4.1 Flash pricing
Publishes cache-write rates for every model

Upgrade Notes

If you were using the deprecated GPT-oss-120b model, you must switch to a supported alternative. New models Claude Opus 5.5 and GPT-6 variants are now available for use.

The Two Releases

v0.52.50

Sep 22, 2026· 30 days ago

This release updates the copilot integration to support Grok 4.7 and includes routine maintenance to auto-update generated files.

Full release notes

v0.52.51

Sep 22, 2026· 30 days ago

This release introduces support for new AI models including Claude Opus 5.5 and GPT-6 variants, updates DeepSeek v4.1 Flash with pricing and attachment capabilities, and removes the deprecated GPT-oss-120b model.

Full release notes