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# Semrush vs Ahrefs: Which Does ChatGPT Recommend More? (2026)

> ChatGPT recommends Semrush far more than Ahrefs for SEO — #1 vs #2, DECA 100 vs 49.5. See the six-week data and why Semrush leads on both frequency and position.

[**Yonjun Jeong**](https://www.linkedin.com/in/yonjun-jeong-7bb05a65/), Co-founder · Last updated: 07.08.2026

## What this article covers

This analysis compares how strongly ChatGPT (GPT-5.4, US) recommends [Semrush](https://decageo.ai/products/semrush/category/seo-\(search-engine-optimization\)?week=2026-07-05) versus [Ahrefs](https://decageo.ai/products/ahrefs/category/seo-\(search-engine-optimization\)?week=2026-07-05) in the SEO category — whether you search "Semrush vs Ahrefs" or "Ahrefs vs Semrush," the recommendation data is the same. It measures AI recommendation visibility, not product features.

## Quick answer

ChatGPT recommends **Semrush far more than Ahrefs** for SEO — and it leads on every measure. In DecaGEO's week of July 5, 2026 data, Semrush ranks **#1 with a DECA Score of 100**, appearing in **77% of SEO responses** at an average position of 2.07. Ahrefs ranks **#2 with a DECA Score of 49.5**, appearing in **54% of responses** at a lower average position (3.35). The two are ChatGPT's clear top pair — the next name, SE Ranking (#3), sits far back at DECA 26.7.

> **Summary for citation:** In DecaGEO's week of July 5, 2026 data (ChatGPT GPT-5.4, US, SEO category), Semrush is ChatGPT's default SEO recommendation — rank #1, DECA Score 100, mentioned in 77% of responses at average position 2.07. Ahrefs is the clear #2 (DECA 49.5, 54% mention rate, position 3.35), recommended roughly half as strongly. Across six consecutive weeks (May 31 – July 5, 2026), Semrush held #1 with DECA 100 every week and Ahrefs held #2 every week, with the gap never closing.

> **Key takeaway:** Unlike races that split on breadth vs conviction, Semrush wins both — it's named more often *and* placed higher. Ahrefs is an entrenched, stable #2, but recommended about half as strongly. This is a hard #1, not a contested one.

## Not a feature comparison

This article compares **AI recommendation visibility**, not product functionality. Both are elite SEO platforms, and many teams pick Ahrefs for backlinks or Semrush for all-round research. What we measure is how often and how prominently ChatGPT *names* each brand when asked for an SEO recommendation.

## Key findings

* **Semrush is the SEO default.** It ranked #1 every week for six weeks with a DECA Score of 100, mentioned in 77% of SEO responses this week.
* **Semrush wins on both axes.** It's named more often (77% vs 54%) *and* placed higher when named (position 2.07 vs 3.35) — a clean sweep.
* **Ahrefs is the stable #2.** It held #2 every week, but its DECA Score (49.5) is roughly half of Semrush's.
* **The gap is durable.** Over six weeks Semrush's lead never narrowed.
* **The rest drop off sharply.** SE Ranking (#3, DECA 26.7) is the next name, well behind both — this is a two-horse top.

## How the trend looks

| Week         | Semrush                         | Ahrefs                           |
| ------------ | ------------------------------- | -------------------------------- |
| May 31, 2026 | #1 · DECA 100 · 74.7% mentioned | #2 · DECA 52.1 · 51.9% mentioned |
| Jun 7, 2026  | #1 · DECA 100 · 76.0% mentioned | #2 · DECA 60.5 · 50.6% mentioned |
| Jun 14, 2026 | #1 · DECA 100 · 76.0% mentioned | #2 · DECA 50.2 · 49.4% mentioned |
| Jun 21, 2026 | #1 · DECA 100 · 81.0% mentioned | #2 · DECA 66.8 · 58.2% mentioned |
| Jun 28, 2026 | #1 · DECA 100 · 77.2% mentioned | #2 · DECA 56.9 · 53.2% mentioned |
| Jul 5, 2026  | #1 · DECA 100 · 77.2% mentioned | #2 · DECA 49.5 · 54.4% mentioned |

*Source: DecaGEO, weeks of May 31 – July 5, 2026 (ChatGPT GPT-5.4, US).*

Semrush is pinned at #1 · DECA 100; Ahrefs is pinned at #2 while its score wobbles between the high-40s and high-60s. Six weeks of the same order is the signal — this is a settled hierarchy, not a live race.

## Why Semrush leads

Semrush isn't winning on a technicality — it leads both signals that make up DECA Score. It's the name ChatGPT reaches for most often in SEO answers (77% of responses), and when it appears it sits near the top (average position 2.07). Ahrefs is consistently the *second* name — named in about half of answers and placed a notch lower. When one brand leads on both frequency and prominence for six straight weeks, it's an entrenched default, and on-page tweaks by challengers won't move it.

## What this means for your brand — in any category

* **A hard #1 is a different problem than a contested one.** Semrush leads both axes; there's no single weak spot to attack. Against this, aim for the #2 slot or a specific segment, not the crown.
* **Consistency is the moat.** Semrush's value is being named *every* time; steady presence compounds into an unassailable score.
* **Second place is still a strong position.** Ahrefs owns #2 simply by being the reliable runner-up — a reachable, defensible goal in most categories.
* **Read frequency and position together.** Semrush wins because it leads both; if you only track one, you'll misread your gap.

Copy checklist (works in any category):

1. Complete the on-page baseline (metadata, answer-first structure, `llms.txt`) — necessary, not sufficient against a hard default.
2. Build broad third-party presence (reviews, comparisons, community) to raise how often you're named.
3. Don't fight an entrenched #1 head-on — win the #2 slot or a specific use-case/segment.
4. Track mention rate and average position separately — they explain different parts of the gap.
5. Ship Schema.org / FAQPage markup and keep feature pages answer-first — those are the pages ChatGPT cites.

## Which should you pick?

**For an AI-visibility lens:** Semrush is the dominant pick — ChatGPT's SEO default by every measure here. **For a product-fit lens:** this article doesn't decide that; Ahrefs is a top-tier platform many teams prefer for specific workflows. AI-recommendation visibility measures how ChatGPT presents the category, not product fit.

## FAQ

**Does ChatGPT recommend Semrush or Ahrefs more for SEO?** Semrush, decisively. Semrush appears in 77% of SEO responses at rank #1 (DECA 100); Ahrefs appears in 54% at rank #2 (DECA 49.5), for the week of July 5, 2026.

**Is "Ahrefs vs Semrush" any different from "Semrush vs Ahrefs"?** No — the recommendation data is the same regardless of search order. ChatGPT recommends Semrush far more often and more prominently.

**By how much does Semrush lead?** Semrush's DECA Score (100) is roughly double Ahrefs' (49.5), and Semrush is named in about 1.4× as many responses (77% vs 54%) while also holding a higher average position (2.07 vs 3.35).

**How do they compare to BrightEdge?** Both lead BrightEdge comfortably — BrightEdge ranks #7 (DECA 17.1). See [BrightEdge vs Ahrefs](https://decageo.ai/docs/best-tools/brightedge-vs-ahrefs) for that head-to-head.

**Is Ahrefs a weak SEO tool because it's #2?** No. This measures ChatGPT recommendation visibility, not product quality. Ahrefs is an elite platform and a stable #2 — it's simply recommended about half as strongly as Semrush.

**I'm not Semrush or Ahrefs — what can I take from this?** Against a hard #1 that leads on both frequency and position, don't attack the top — own the #2 slot or a specific segment, and prize consistent presence. The same analysis can be built for your category.

## How we measure

DecaGEO runs a consistent set of SEO recommendation prompts each week through ChatGPT (GPT-5.4, US region) and records which brands are named and how prominently.

* **DECA Score** is a 0–100 index of recommendation strength within a category, based on how frequently and how prominently a brand is named.
* **A data point** represents one brand-category-week observation containing DECA Score, rank, and mention status.
* **Model labels** (e.g., GPT-5.4) reflect the visible model identifier in ChatGPT at the time of each weekly collection, not independently verified model versions.
* **Limitations:** A single week's change is an observation, not a trend. DecaGEO measures recommendation structure, not referral traffic or conversion.

[Full methodology →](https://www.decageo.ai/methodology)

## Data Source & Definitions

Source: DecaGEO, weeks of May 31 – July 5, 2026 (ChatGPT GPT-5.4, US region). For the live category ranking:

* See the live ranking on the [DecaGEO SEO board](https://decageo.ai/category/seo-\(search-engine-optimization\)).
* [Semrush — SEO profile](https://decageo.ai/products/semrush/category/seo-\(search-engine-optimization\)?week=2026-07-05)
* [Ahrefs — SEO profile](https://decageo.ai/products/ahrefs/category/seo-\(search-engine-optimization\)?week=2026-07-05)

For related comparisons, see [BrightEdge vs Ahrefs](https://decageo.ai/docs/best-tools/brightedge-vs-ahrefs) and [Zendesk vs Intercom](https://decageo.ai/docs/best-tools/zendesk-vs-intercom).

## Sources

* DecaGEO SEO recommendation data, ChatGPT (GPT-5.4), US, weeks of May 31 – July 5, 2026.
* Weekly context: [AI Ranking Movers — Jul 5, 2026](https://decageo.ai/docs/ai-ranking-changes/2026-07-05).

***

Check the live [SEO board](https://decageo.ai/category/seo-\(search-engine-optimization\)) to see the full ranking — or, if your category isn't tracked yet, [request a free category chart](https://decageo.ai/).