# Perplexity — Low, medium, and high presets use GPT-6

- Company: Perplexity (perplexity.ai)
- Announced: 2026-09-25T17:56:50+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/14332-low-medium-and-high-presets-use-gpt-6
- Subject: Sonar
- Models affected: openai/gpt-6-luna, openai/gpt-6-sol

Perplexity's Agent API low, medium, and high presets now use GPT-6 model variants instead of GPT-5.6. The low and medium presets switched to openai/gpt-6-luna, while the high preset switched to openai/gpt-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:

> low, medium, and high presets now use the GPT-6 model family

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Record: https://forck.live/items/14332-low-medium-and-high-presets-use-gpt-6
Catalogue: https://forck.live/llms.txt
Current issue: https://forck.live/feed.md