# collab-staging: anthropic: Add support for Sonnet and Haiku 5.5 (#65555)

> **Key Architectural Takeaway:** Summary Adds Sonnet 5.5 and Haiku 5.5.

**Published:** 2026-10-13T15:37:11+00:00 
**Source:** Zed High-Performance Code Editor 
**Category:** foss-apps 
**Canonical URL:** https://fosswire.org/news/collab-staging-anthropic-add-support-for-sonnet-and-haiku-55.html 

## Executive Summary
Summary Adds Sonnet 5.5 and Haiku 5.5. Reasoning can't be disabled for Sonnet 5.5, but it added a new reasoning level that we can use instead. Self-review I've reviewed my diff for quality, security, reliability, and performance. Tests cover the new or changed behavior. Release Notes: N/A

## Architectural & Systems Analysis
From an artificial intelligence architecture, model weights governance, and inference efficiency perspective:

- **Weights Accessibility & Sovereignty:** Evaluates whether weights are open for private self-hosting or locked behind centralized cloud APIs.
- **Quantization & Edge Performance:** Kernel optimizations (4-bit/8-bit GGUF, AWQ, EXL2) allow high tokens-per-second on consumer GPUs and Apple Silicon.
- **Reasoning & Architectural Scaling:** Scrutinizes mixture-of-experts (MoE), attention mechanisms, and fine-tuning datasets against open community benchmarks.

## Impact on the Open Ecosystem
Protects developers and enterprises from proprietary black-box entrapment, fostering auditable, sovereign AI infrastructure.