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On 2026-07-29 Max Spero (@max_spero_) announced two new models from Pangram…

Brief

Pangram 4 and Pangram Image are two models announced by Max Spero on 2026-07-29: Pangram 4 rethinks mixed-authorship detection by adding a tokenwise head that predicts labels per token given full-document context (supported by a 38-page technical report), while Pangram Image brings the detection approach to images and videos with strong early results.

Why it matters

On 2026-07-29 Max Spero (@max_spero_) announced two new models from Pangram: Pangram 4 and Pangram Image.

Key details

  • Pangram 4 adds a tokenwise head to the classifier to give every token a prediction in the full-document context, and the team published a 38-page technical report detailing experiments, methodology, and evaluations.
  • Pangram Image extends detection to AI-generated images and videos; early testing reportedly performed “shockingly well,” including on real photos of AI-generated bodega menus.
Source evidence

pangram may well one day become the world's most important binary classifier

Max Spero (@maxspero)

This is our most ambitious announcement yet. Two new models: Pangram 4 and Pangram Image.

Pangram 4 completely reimagines how we approach the problem of mixed authorship, by adding a tokenwise head onto the classifier to give every token a prediction given the full document context. We also wrote a 38-page technical report detailing our experiments, methodology, and evals.

Pangram Image is a completely new modality, bringing our detection expertise to AI-generated image and videos. In my early testing, it has worked shockingly well, even in strange cases like real photos of AI-generated bodega menus.

Today marks a huge step in the frontier of AI detection technology. I'm so excited to finally share with you all!

— https://nitter.net/maxspero/status/2082485289704927338#m