---
title: "Perplexity API Fast preset now uses Fast Search: 2026-09-25 | Harbyn"
description: "Perplexity API Fast preset now uses Fast Search, announced Sep 25, 2026."
canonical: "https://harbyn.com/changes/perplexity/2026-09-25-fast-preset-uses-fast-search-the-agent-api-fast-preset-now-uses-fast-search-sear"
last-updated: 2026-10-02
---

# Perplexity API Fast preset now uses Fast Search

Markdown version of <https://harbyn.com/changes/perplexity/2026-09-25-fast-preset-uses-fast-search-the-agent-api-fast-preset-now-uses-fast-search-sear>.

Behavior change - Perplexity API. info severity. Announced.

The Agent API fast preset now uses Fast Search (search\_type: "fast"). For the fast preset, web\_search drops from $2.50 to $1.00 per 1,000 invocations, and search is about 800 ms faster.

## Facts

| Fact | Value |
| --- | --- |
| Vendor | [Perplexity API](https://harbyn.com/vendors/perplexity.md) |
| Kind | Behavior change |
| Severity | info |
| Status | Announced |
| Announced | Sep 25, 2026 |
| Added to Harbyn | Oct 2, 2026 |
| Lead time | No dated deadline |
| Review | Reviewed by a person, extracted by a model |

## Find it in your code

```sh
npx harbyn scan
```

This change names no identifier the scanner can match line by line, so the scan tells you whether your repository uses Perplexity API, from its packages and API hosts. Nothing leaves your machine.

## Sources

Where this event comes from: the page we read, when we read it, and the hash of that snapshot.

- <https://docs.perplexity.ai/docs/resources/changelog/rss.xml> (changelog, fetched 2026-10-02 02:33 UTC, sha256 `a639ff52d155e27327358663168d7a30d0d18a1a787ed51e2cec5d1a90528fe1`)

## Related changes

### More from Perplexity API

- [Low, medium, and high presets now use GPT-6 models](https://harbyn.com/changes/perplexity/2026-09-25-low-medium-and-high-presets-use-gpt-6-the-agent-api-low-medium-and-high-presets.md) (Behavior change, announced Sep 25, 2026)
- [older OpenAI models retired from the Agent and Router APIs on October 24, 2026](https://harbyn.com/changes/perplexity/2026-09-25-older-openai-models-retired-october-24-2026.md) (Retirement, effective Oct 24, 2026)
- [Agent API responses now report sandbox extraction usage and cost](https://harbyn.com/changes/perplexity/2026-10-05-accurate-sandbox-extraction-usage-and-costs-agent-api-responses-now-include-mode.md) (Behavior change, announced Oct 5, 2026)
- [Decisions API requests for pplx-decider-v1.1-27b now use pplx-decider-v1.2](https://harbyn.com/changes/perplexity/2026-10-16-decisions-api-pplx-decider-v1-2-and-pplx-decider-flash-v1-2-pplx-decider-v1-2-re.md) (Behavior change, announced Oct 16, 2026)

### Changes at other vendors

- [Amazon Selling Partner API: ORDER\_CHANGE notifications add PreFulfillmentStatusChange for Amazon Autos](https://harbyn.com/changes/amazon-sp-api/2026-10-14-sp-api-updates-new-listings-items-api-ivp-values-in-eu5-jp-and-ca-stores-oct-3.md) (effective Oct 28, 2026)
- [BigCommerce: 301 redirects will apply only to storefront channels](https://harbyn.com/changes/bigcommerce/2026-10-07-301-redirects-now-apply-to-storefront-channels-only.md) (effective Nov 10, 2026)
- [GitHub: Secret scanning audit log business field changes to enterprise slug](https://harbyn.com/changes/github/2026-10-20-updates-to-github-secret-scanning-7.md) (effective Nov 12, 2026)
- [Jira / Atlassian Cloud: New IP address ranges in use from January 1, 2027](https://harbyn.com/changes/atlassian-jira/2026-10-16-atlassian-cloud-adds-new-ip-address-ranges.md) (effective Jan 1, 2027)

[All upcoming deadlines](https://harbyn.com/deadlines.md)