Open beta Zabio is in open beta: anyone can sign up and use it in production. Models, prices and features can still change while we learn from the first customers. Tell us what breaks at hello@zabio.ai.
Menu
Start free
All news
anthropicModel

Anthropic launches Claude Sonnet 5.5

Anthropic released Claude Sonnet 5.5 across multiple cloud platforms and the Claude API.

Models:claude-sonnet-5-5claude-sonnet-5Claude Opus 4.8Claude Opus 4.7

What changed

Anthropic launched Claude Sonnet 5.5 (claude-sonnet-5-5). The model is available on the Claude API, Claude in Amazon Bedrock, Claude Platform on AWS, Claude on Google Cloud, and Claude in Microsoft Foundry. Code written for Claude Sonnet 5 can break in five ways, including changes to thinking parameters, forced tool use errors, and advisor restrictions.

What it means for Zabio customers

Claude Sonnet 5 is available in the Zabio catalog in the balanced tier and is used by auto routing. Claude Sonnet 5.5, Claude Opus 4.8, and Claude Opus 4.7 are not in the Zabio catalog.

What Zabio does

Catalog change under review. Not in the Zabio catalog yet: claude-sonnet-5-5.

Source

We’ve launched Claude Sonnet 5.5 (claude-sonnet-5-5).

Original announcement: Claude Platform release notes

Published automatically from the official announcement, minutes after it appeared. Reviewed by a person within the day.

Source: Claude Platform release notes (2026-09-28)