# SiliconANGLE — Anthropic debuts Claude Sonnet 5.5 running 30% faster than the previous-generation AI model

- Company: SiliconANGLE (siliconangle.com)
- Announced: 2026-09-28T18:00:39+00:00
- Category: model-update
- Coverage: not counted
- Announcement: yes
- Group: models
- Source: https://siliconangle.com/2026/09/28/anthropic-debuts-claude-sonnet-5-5-running-30-faster-than-the-previous-generation-ai-model/
- Record: https://forck.live/items/14722-anthropic-debuts-claude-sonnet-5-5-running-30-faster-than-the-previous
- Subject: Reporting
- Models affected: Claude Sonnet 5.5
- Pricing: $2 per million input tokens, $10 per million output tokens, and $0.20 per million cache reads

Anthropic released Claude Sonnet 5.5, a mid-tier model that runs over 30% faster than the previous generation at the same nominal price, and the company says it typically requires fewer tokens for the same work, making it 30% cheaper. The model includes invisible text watermarking for compliance with regulations such as the EU AI Act, and scored 70.6% on Terminal-Bench 4.0 versus the previous model's 10.3%. Anthropic plans to release Haiku 5.5 in the coming weeks.

## Evidence

Verbatim from https://siliconangle.com/2026/09/28/anthropic-debuts-claude-sonnet-5-5-running-30-faster-than-the-previous-generation-ai-model/:

> The model is priced the same as Sonnet 5 at $2 per million input tokens, $10 per million output tokens, and $0.20 per million cache reads. According to the company, the model would typically require far fewer tokens to do the same work, making it 30% cheaper than the previous generation.

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Record: https://forck.live/items/14722-anthropic-debuts-claude-sonnet-5-5-running-30-faster-than-the-previous
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