AI SEO Benchmark
Digital marketing is being impacted by AI in everyday workflows. But is AI good enough to be trusted for your business? We've designed a unique benchmark for the SEO industry to do just that.
The LLM Leaderboard
Updated Aug 18, 2026
| Language Model | Score (out of 100) | % Diff vs Prev Model | Release Date |
|---|---|---|---|
| Claude Opus 4.6 | 87% | +11% | Feb 5, 2026 |
| Chat GPT-5.4 Pro | 86% | +9% | Mar 5, 2025 |
| Chat GPT-5.6 | 84% | 0% | Jul 9, 2026 |
| Chat GPT-5.5 Pro | 84% | -2% | Apr 23, 2026 |
| Claude Opus 5 | 83% | +16% | Jul 24, 2026 |
| Claude Sonnet 5 | 83% | +1% | Jun 30, 2026 |
| Kimi K2.6 | 82% | n/a | Feb 2, 2026 |
| Claude Fable 5 | 77% | NEW | June 9, 2026 |
| Grok 4.6 | 80% | 0% | Aug 12, 2026 |
| Gemini 3.5 Flash | 76% | +7% | May 19, 2025 |
| Meta Muse | 76% | +1% | Jul 9, 2026 |
| Gemini 3.1 Pro | 74% | +1% | Feb 19, 2026 |
| Deepseek V4 | 73% | -4% | Apr 24, 2026 |
| Claude Opus 4.7 | 70% | -17% | April 16, 2026 |
| Claude Opus 4.8 | 67% | -3% | May 28, 2026 |
| Perplexity | 63% | -15% | Jul 29, 2026 |
How We Test AI SEO Performance
- Expert-level SEO questions, updated regularly, focused on in-the-field experience to measure how useful LLMs are at understanding SEO problems.
- The questions are multiple choice and verified by a panel of SEO professionals.
- Based on our test of a sampling of questions with SEO professionals, an expert-level search marketer would be expected to achieve a rating of 89% + considering that SEO professionals typically specialize in one field.
- SAMPLE QUESTION: Instead of manually penalizing sites that are breaking Google's linking policies, Google has started: (select all that apply)
- Deindexing sites
- Not passing their authority to linked sites
- Quietly dropping their overall ranking
- Changing the SERP to show more ads
- - Answer - B & C
Have questions on what this data means to your business? Check out our coverage on Search Engine Land where we will regularly post updates about the progress of LLMs and how it's impacting digital marketing.
David Bell
As co-founder of Previsible SEO, David combines data-driven insights with scalable processes to transform complex marketing initiatives into predictable growth engines.
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