Grok vs Perplexity Comet
Which one should you pick? Here's the full breakdown.
Grok
xAI's irreverent chatbot with a direct line to X/Twitter -- real-time data meets unfiltered personality
Perplexity Comet
Perplexity's agentic AI browser -- FREE on all platforms as of 2026-03-18 (previously $200/mo Max-only). iOS, Android, Windows, Mac. Browses the web, executes multi-step tasks, and summarizes pages in-line. Comet Plus ($5/mo) adds premium publisher content
| Category | Grok | Perplexity Comet |
|---|---|---|
| Ease of Use | 7.0 | 8.0 |
| Output Quality | 7.5 | 8.0 |
| Value | 7.5 | 9.5 |
| Features | 8.0 | 8.0 |
| Overall | 7.5 | 8.4 |
Pricing Comparison
| Feature | Grok | Perplexity Comet |
|---|---|---|
| Free Tier | Yes | Yes |
| Starting Price | $0 | $0 |
Benchmark Head-to-Head
Grok 4.20 benchmarks — Perplexity Comet has no published benchmarks
| Benchmark | Description | Score |
|---|---|---|
| MMLU | Knowledge across 57 subjects | 88.5% |
| GPQA Diamond | Graduate-level science questions | 85% |
| HumanEval | Python code generation | 90% |
| Humanity's Last Exam | Frontier difficulty questions | 50.7% |
Which Should You Pick?
Pick Grok if...
People who live on X/Twitter and want an AI that can tap into that data in real-time. Also good for users who find mainstream chatbots too sanitized and want something with more personality.
Visit GrokPick Perplexity Comet if...
- ✓Easier to use (8 vs 7)
- ✓Better value for money (9.5/10)
Users who already use Perplexity for search and want an agent browser that can complete multi-step tasks (booking, research, shopping, document summarization) across tabs. Also a strong introduction to the AI-browser category for anyone curious but unwilling to pay $200/mo for a preview -- the 2026-03-18 free rollout makes evaluation risk-free.
Visit Perplexity CometOur Verdict
Perplexity Comet edges out Grok with a 8.4 vs 7.5 overall score. Both are solid picks, but Perplexity Comet has the advantage in output quality.