# Perplexity — xhigh preset uses Claude Opus 5.5

- Company: Perplexity (perplexity.ai)
- Announced: 2026-09-28T19:16:57+00:00
- Category: model-update
- Coverage: not counted
- Announcement: yes
- Group: models
- Source: https://docs.perplexity.ai/docs/resources/changelog#september-2026
- Record: https://forck.live/items/14744-xhigh-preset-uses-claude-opus-5-5
- Subject: Sonar
- Models affected: Claude Opus 5.5

Perplexity's Agent API xhigh preset now uses Claude Opus 5.5 instead of GPT-5.6-sol. Prompts, reasoning effort, tools, token budgets, and step limits remain unchanged.

## Evidence

Verbatim from https://docs.perplexity.ai/docs/resources/changelog#september-2026:

> The Agent API xhigh preset now uses Claude Opus 5.5:

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Record: https://forck.live/items/14744-xhigh-preset-uses-claude-opus-5-5
Catalogue: https://forck.live/llms.txt
Current issue: https://forck.live/feed.md