PeopleofSuperintelligence

Lab leader

Charith Peris

Charith Peris is a senior applied scientist at Amazon whose work focuses on responsible AI for language models. He studied physics at Northeastern, was selected for a 2015 graduate award, and moved from astrophysics into Amazon Alexa’s natural-language-understanding work. His AI projects include AlexaTM 20B, the MASSIVE multilingual dataset, language-model detoxification, and multi-agent chain-of-thought training. As of October 2026, he leads applied-science teams at Amazon AGI on responsible AI for foundation models and agents, including reinforcement learning from human feedback.

Now at
Amazon
Works
64
Citations
341
h-index
8

Publication numbers from OpenAlex, as of 19 October 2026.

Timeline

  1. 2015

    An experiential-learning award

    A physics doctoral candidate at Northeastern, he is selected for its Outstanding Graduate Student Award for Experiential Learning in 2015.

  2. 2022–2023

    Multilingual models and data

    In 2022, he coauthors AlexaTM 20B, a 20-billion-parameter multilingual sequence-to-sequence model that achieves state-of-the-art performance on one-shot summarization tasks. In 2023, he coauthors MASSIVE, a dataset of one million labelled virtual-assistant utterances spanning 51 languages and 18 domains.

  3. 2024

    Fine-tuning for detoxification

    In 2024, he presents regularized fine-tuning that trains language models to follow output constraints while preserving performance.

  4. 2025

    Multi-agent reasoning data

    In 2025, he and Tharindu Kumarage report a multi-agent method for generating and refining chain-of-thought training data, with an average 29% improvement across a battery of benchmarks.

  5. By 2026

    From astrophysics to Alexa

    By 2026, he moves from astrophysics into machine learning through Amazon Alexa’s natural-language-understanding work.

  6. February 2026

    Nova Responsible AI

    In February 2026, he is a senior applied scientist in the Nova Responsible AI team at Amazon AGI.

  7. May 2026

    Leading RLHF post-training

    In May 2026, he leads the reinforcement-learning-from-human-feedback phase of model development.

  8. As of October 2026

    Responsible AI at Amazon

    As of October 2026, he leads applied-science teams at Amazon AGI on responsible AI for foundation models and agents.

Career

  1. Since 2026AmazonSenior Applied Scientist

Education

  1. Northeastern UniversityPhD candidate in Physics

From the biography and OpenAlex affiliations (the years of papers that list the organization), so some years are approximate.

Most-cited works

  1. MASSIVE: A 1M-Example Multilingual Natural Language Understanding Dataset with 51 Typologically-Diverse Languages2023 · Annual Meeting of the Association for Computational Linguistics (ACL) · 93 citations
  2. Alexa Teacher Model2022 · ACM SIGKDD Conference on Knowledge Discovery and Data Mining (KDD) · 68 citations
  3. Privacy in the Time of Language Models2023 · 41 citationsWith Richard Zemel
  4. AlexaTM 20B: Few-Shot Learning Using a Large-Scale Multilingual Seq2Seq Model2022 · 37 citations
  5. Controlling the Extraction of Memorized Data from Large Language Models via Prompt-Tuning2023 · Annual Meeting of the Association for Computational Linguistics (ACL) · 15 citations

From OpenAlex, as of 19 October 2026.

  1. Google alumni founded or led 81 other organizations, the most among the labs we compareIncludes Amazon. We trace 194 organizations founded or led by AI lab alumni, and 202 career moves between the labs.
  2. Google has the highest combined h-index among AI organizationsIncludes Amazon. Our estimates of combined and median h-index at AI organizations, using current affiliations and OpenAlex records.
  3. The company share of AI researchers’ top papers rose from 2% to 32%Includes Amazon. We estimate where leading AI researchers worked when their most-cited papers appeared. The company share rose from 2% in 1975–1979 to 32% in 2020–2024.
  4. 12 of 76 people shaping AI with a former OpenAI role now work at AnthropicIncludes Amazon. Our estimates of where OpenAI recruits came from and where people with former OpenAI roles work now.

Colleagues

People with dated positions at the same organization in the same years.

Sources and credits

Photo: We have no published photo of Charith Peris yet. Send us a free-licensed photo.

  1. Northeastern announces year-end award winners news.northeastern.edu. Checked 19 October 2026.
  2. Charith Peris - Amazon Science amazon.science. Checked 19 October 2026.
  3. MASSIVE: A 1M-Example Multilingual Natural Language Understanding Dataset with 51 Typologically-Diverse Languages aclanthology.org. Checked 19 October 2026.
  4. Detoxification of large language models via regularized fine-tuning amazon.science. Checked 19 October 2026.
  5. Multiagent AI for generating chain-of-thought training data amazon.science. Checked 19 October 2026.
  6. Dr. Charith Peris: Navigating AI’s next frontier lmd.international. Checked 19 October 2026.
  7. Building trust into AI amazon.science. Checked 19 October 2026.
  8. Charith Peris – AI/ML Leader charithperis.com. Checked 19 October 2026.