Pangram Labs builds the most accurate AI text detector in the world. Team is >25 FTE; they are active on Twitter, you can engage directly, look for "affiliates" tab of @pangram.

Here is a table of their performance on adversarially modified AI text (source paper):

Language

AI Text Detection %

Humanized AI Text Detection %

GPTZero

95.60%

34.53%

Binoculars

94.40%

29.73%

Pangram Baseline

100.00%

73.07%

Pangram Humanizers (current model!)

100.00%

93.66%

Note that "current model!" is not current as of July 2026. Their classifier now provides a percentage instead of a binary verdict. They released an open source model (Llama-3.2-3B QLoRA) which was SOTA at the time. The paper does not test adversarially modified AI text, but you are welcome to try running this test (repo); it may trigger agent safeguards.

Note again that "Pangram" in this table is not current as of July 2026. Their production model detects Fable 5 outputs with 99.64% accuracy (blog). See prompts. Reasoning effort level (High, Max, etc) is not disclosed. Just to be clear, Pangram knows that the output came from some AI model, but their technology does not predict the specific model used.

Pangram Labs has announced plans to open [...]

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First published:
July 12th, 2026

Source:
https://www.lesswrong.com/posts/gcbTXSpENASM8xfWf/one-pager-brief-on-pangram-labs

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Narrated by TYPE III AUDIO.

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“One-Pager Brief on Pangram Labs” by Sheikh Abdur Raheem Ali

LessWrong (30+ Karma)

“One-Pager Brief on Pangram Labs” by Sheikh Abdur Raheem Ali