# Reddit in AI search: week 1

Rodrigo Beckmann · First Answer · Published 2026-10-19 · HTML version: https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w01/

*Weekly index · week 1 edition.* How much each AI model cites Reddit in its answers, week by week, and where that presence is changing.

This is the week 1 edition, kept as published. [See the current edition](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/)

Week 1 · Dec 29, 2025 – Jan 4, 2026

## In short

In week 1, Grok was the model that cited Reddit most, in 41.6% of answers, followed by Perplexity (36.8%). This is the first week of the series; comparisons start in week 2.

## Week 1 ranking

Share of answers citing Reddit. First week of the series, no comparison.

| Model | Presence | Week change | 4-week avg. | Since W1 | Change |
| --- | --- | --- | --- | --- | --- |
| 1. Grok | 41.6% | — | 41.6% | → 0.0 pp | Start of series |
| 2. Perplexity | 36.8% | — | 36.8% | → 0.0 pp | Start of series |
| 3. ChatGPT | 21.1% | — | 21.1% | → 0.0 pp | Start of series |
| 4. Google AI Overviews | 12.3% | — | 12.3% | → 0.0 pp | Start of series |
| 5. Google AI Mode | 9.4% | — | 9.4% | → 0.0 pp | Start of series |
| 6. Gemini | 0.1% | — | 0.1% | → 0.0 pp | Start of series |
| 7. Copilot | 0.0% | — | 0.0% | → 0.0 pp | Start of series |

Presence: share of the model's answers that cite reddit.com among their sources. Changes in percentage points (pp).

## Timeline

| Week | Dates | Google AI Overviews | Google AI Mode | Grok | Gemini | Perplexity | ChatGPT | Copilot |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| W1 | Dec 29, 2025 – Jan 4, 2026 | 12.3% | 9.4% | 41.6% | 0.1% | 36.8% | 21.1% | 0.0% |

Reddit presence by model, weeks 1 to 1 of 2026 (% of answers). * = week with a reduced base; — = no data. Source: data observed and catalogued by First Answer.

### All weeks

- [W43 · Oct 19–25](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/): No significant changes (current edition)
- [W42 · Oct 12–18](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w42/): Largest rise: Google AI Overviews (+2.4 pp)
- [W41 · Oct 5–11](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w41/): Largest drop: Google AI Mode (−1.9 pp)
- [W40 · Sep 28–Oct 4](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w40/): Largest drop: Google AI Overviews (−4.2 pp)
- [W39 · Sep 21–27](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w39/): Largest rise: Google AI Mode (+5.2 pp)
- [W38 · Sep 14–20](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w38/): Largest rise: Perplexity (+1.8 pp)
- [W37 · Sep 7–13](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w37/): Largest rise: Google AI Overviews (+4.1 pp)
- [W36 · Aug 31–Sep 6](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w36/): Largest rise: Google AI Mode (+5.0 pp)
- [W35 · Aug 24–30](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w35/): Largest drop: Google AI Mode (−9.0 pp)
- [W34 · Aug 17–23](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w34/): Largest rise: Google AI Overviews (+15.9 pp)
- [W33 · Aug 10–16](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w33/): Largest drop: ChatGPT (−9.3 pp)
- [W32 · Aug 3–9](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w32/): Largest drop: Google AI Mode (−4.6 pp)
- [W31 · Jul 27–Aug 2](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w31/): Largest rise: ChatGPT (+1.6 pp)
- [W30 · Jul 20–26](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w30/): Largest rise: Google AI Mode (+4.8 pp)
- [W29 · Jul 13–19](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w29/): Largest rise: Google AI Mode (+4.2 pp)
- [W28 · Jul 6–12](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w28/): Largest drop: Grok (−1.7 pp)
- [W27 · Jun 29–Jul 5](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w27/): Largest drop: ChatGPT (−8.4 pp)
- [W26 · Jun 22–28](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w26/): Largest drop: ChatGPT (−9.5 pp)
- [W25 · Jun 15–21](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w25/): Largest rise: ChatGPT (+17.2 pp)
- [W24 · Jun 8–14](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w24/): Largest rise: Google AI Overviews (+2.4 pp)
- [W23 · Jun 1–7](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w23/): Largest drop: ChatGPT (−11.1 pp)
- [W22 · May 25–31](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w22/): Largest drop: Perplexity (−7.0 pp)
- [W21 · May 18–24](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w21/): Largest rise: Google AI Mode (+6.5 pp)
- [W20 · May 11–17](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w20/): Largest rise: ChatGPT (+11.4 pp)
- [W19 · May 4–10](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w19/): Largest rise: ChatGPT (+13.9 pp)
- [W18 · Apr 27–May 3](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w18/): Largest rise: Grok (+6.8 pp)
- [W17 · Apr 20–26](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w17/): Largest drop: Grok (−17.9 pp)
- [W16 · Apr 13–19](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w16/): Largest rise: Google AI Overviews (+5.2 pp)
- [W15 · Apr 6–12](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w15/): Largest rise: Google AI Overviews (+1.1 pp)
- [W14 · Mar 30–Apr 5](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w14/): Largest rise: Grok (+2.5 pp)
- [W13 · Mar 23–29](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w13/): Largest rise: Grok (+9.7 pp)
- [W12 · Mar 16–22](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w12/): Largest drop: Google AI Overviews (−6.4 pp)
- [W11 · Mar 9–15](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w11/): Largest drop: ChatGPT (−3.3 pp)
- [W10 · Mar 2–8](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w10/): Largest drop: ChatGPT (−8.6 pp)
- [W9 · Feb 23–Mar 1](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w09/): Largest drop: Perplexity (−10.9 pp)
- [W8 · Feb 16–22](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w08/): Largest drop: Perplexity (−2.3 pp)
- [W7 · Feb 9–15](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w07/): Largest rise: Google AI Overviews (+7.9 pp)
- [W6 · Feb 2–8](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w06/): Largest rise: Grok (+10.3 pp)
- [W5 · Jan 26–Feb 1](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w05/): Largest drop: Google AI Overviews (−6.0 pp)
- [W4 · Jan 19–25](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w04/): Largest rise: Grok (+14.9 pp)
- [W3 · Jan 12–18](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w03/): Largest rise: Perplexity (+9.6 pp)
- [W2 · Jan 5–11](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w02/): Largest rise: Grok (+2.6 pp)
- [W1 · Dec 29–Jan 4](https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w01/): Start of the series

## Events

Large changes in the series and what is known about them. We only log explanations with a source; when there is none, we say so.

No events logged up to this week.

## Method, in short

Source: data observed and catalogued by First Answer. Each week, we measure by model the share of answers that cite reddit.com among their sources and compare it with the previous week. A change is flagged as significant only when it exceeds the 95% margin and is at least 1 pp. Weeks with a smaller-than-usual base are flagged and left out of the comparison.

## Limitations

The index measures what First Answer's base observes, not every search made on the models. We do not disclose volumes, questions, topics, categories, brands or clients; only aggregate measures by model. Claude is not included in this series. Explanations under Events come from external sources and state how confirmed they are.

## How to cite

Beckmann, R. (2026). *Reddit in AI search: weekly index* (week 1, Dec 29, 2025 – Jan 4, 2026). First Answer. https://rodrigobeckmann.com/en/research/indices/reddit-in-ai-search/2026-w01

## Related study

[FA-MET-01 — How to Measure What an AI Recommends](https://rodrigobeckmann.com/en/research/how-to-measure-what-an-ai-recommends/): How many queries it takes to tell an isolated observation from a real pattern.