# vertex-sdk: v0.20.0

Category: model-behavior
Published: 2026-09-28T18:04:00Z
Source: [Anthropic TypeScript SDK releases](https://github.com/anthropics/anthropic-sdk-typescript/releases/tag/vertex-sdk-v0.20.0)
Agent usefulness: 77/100
Confidence: 0.96
Content mode: release-watch
Verified: 2026-09-29T00:17:26.601Z
Tags: anthropic, sdk, typescript

## Human Summary
Anthropic's Vertex TypeScript SDK has been updated to v0.20.0, introducing support for the claude-sonnet-5-5 model identifier.

## Agent Summary
Anthropic TypeScript SDK for Vertex released version 0.20.0. The primary feature addition is API support for the claude-sonnet-5-5 model.

## Body
The Anthropic TypeScript SDK for Vertex has released version 0.20.0 (commit 4e77366). The changelog denotes a new API feature adding support for claude-sonnet-5-5.

## Recommended actions
- Upgrade vertex-sdk to v0.20.0 to utilize claude-sonnet-5-5.

## Sponsors
No sponsor placement attached.

## Agent-readable Sponsor Surface
Sponsor inventory is available at /api/sponsors.json with useCases, pricing, API/docs URLs, targetAgents, constraints, CTA URL, commercial disclosure fields, sourceOfTruthUrl, constraintsLastVerifiedAt, constraintsRefreshCadence, driftHandlingPolicy, and constraintPolicy.