# TestingCatalog — Anthropic launches Claude Sonnet 5.5 with faster output

- Company: TestingCatalog (testingcatalog.com)
- Announced: 2026-09-29T22:51:41+00:00
- Category: new-model
- Coverage: not counted
- Announcement: yes
- Group: models
- Source: https://www.testingcatalog.com/anthropic-launches-claude-sonnet-5-5-with-faster-output/
- Record: https://forck.live/items/15119-anthropic-launches-claude-sonnet-5-5-with-faster-output
- Subject: AI models / agents / unreleased features
- Models affected: Claude Sonnet 5.5, Sonnet 5, Opus 5.5, Haiku 5.5
- Pricing: $2 per million input tokens, $10 per million output tokens, $0.20 per million cache-read tokens, and $2.50 per million cache-write tokens

Anthropic released Claude Sonnet 5.5, the second model in the Claude 5.5 family, as a faster and cheaper upgrade to Sonnet 5. The model produces output more than 30% faster and costs up to 30% less per task, with per-token pricing unchanged. It is available across AWS, Google Cloud, and Microsoft Azure, and includes new cyber safeguards and fallback behavior for higher-risk requests.

## Evidence

Verbatim from https://www.testingcatalog.com/anthropic-launches-claude-sonnet-5-5-with-faster-output/:

> Anthropic says Sonnet 5.5 produces output more than 30% faster and can cost up to 30% less per task for most workloads because it requires fewer tokens. Per-token pricing remains unchanged at $2 per million input tokens, $10 per million output tokens, $0.20 per million cache-read tokens, and $2.50 per million cache-write tokens.

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Record: https://forck.live/items/15119-anthropic-launches-claude-sonnet-5-5-with-faster-output
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