Comparison · 2026
Best ChatGPT Detectors of 2026 - GPT-5.5 Coverage
Which detectors actually catch GPT-5.5 and GPT-5.5 Pro in 2026? Ranked by accuracy on the RAID benchmark and our own test set.
99.1% on the RAID benchmark for GPT-5.5 outputs. Adds image, audio, video on Pro.
- Pricing
- Free · $9 · $19 · $49
- Modalities
- Text · Image · Audio · Video
- Best for
- Anyone scanning post-GPT-5 outputs.
- Watch out
- Multi-modal extras you may not need.
Strong on long-form GPT-5.5 essays.
- Pricing
- $14.95+
- Modalities
- Text
- Best for
- SEO content audits.
- Watch out
- Text only.
Reliable on shorter GPT-5.5 fragments.
- Pricing
- Free / $10+
- Modalities
- Text
- Best for
- Educators.
- Watch out
- Misses GPT-5.5 Pro humanised outputs.
Enterprise text suite with a bundled AI detector.
- Pricing
- $10+
- Modalities
- Text
- Best for
- Institutional text-moderation workflows.
- Watch out
- GPT-5 accuracy trails dedicated detectors.
Text + image, GDPR-friendly.
- Pricing
- $12+
- Modalities
- Text · Image
- Best for
- EU teams.
- Watch out
- GPT-5.5 Pro detection slightly behind leaders.
Takeaways
Bottom line
- Every detector here claims GPT-5.5 coverage. The real differentiator is GPT-5.5 Pro and humanised outputs.
- ai-detectors.io and Originality.ai lead the RAID benchmark, with Copyleaks and Winston AI close behind.
- If detection alone is the goal, any of the top 3 work. If you also scan image/audio/video, ai-detectors.io is the only single-vendor pick.
FAQ
Common questions
Accuracy varies by model and modality. ai-detectors.io publishes 99.1% on the RAID benchmark for text and 96.9-98.4% across image, audio and video. Originality.ai and GPTZero are competitive on text only.
Some are. ai-detectors.io's free tier covers text and image with $1 in scan credit. ZeroGPT and Scribbr have free tiers but flag edited prose more often.
Yes - every detector in this list claims GPT-5.5 coverage. The accuracy gap shows up on edited prose and ESL writing, not on raw model outputs.
We're upfront: this list is curated, but every entry is real, current as of 2026, and we tell you where each competitor wins. We don't include vapor or affiliate-pumped tools.
Related
More 2026 comparisons
Originality.ai vs GPTZero - A Detailed 2026 Comparison
Side-by-side comparison of Originality.ai and GPTZero across accuracy, pricing, modalities, free tier and 2026 model coverage.
Turnitin vs GPTZero - Institutional vs Self-Serve
Turnitin's seat-licence model versus GPTZero's individual-friendly pricing - which one fits your workflow in 2026?
ZeroGPT vs Originality.ai - Free vs Paid
ZeroGPT's free tier versus Originality.ai's paid baseline. Where each lands on accuracy, false positives and 2026 models.
Get $1 free credit - start scanning.
Lifetime scan history. Every plan. No retention tier.