# Charles O’Neill > Charles O’Neill is base Labs researcher; model technical report co-author. elephant-1 and mammoth-1 on Anchor Terminal, with grades, an about and public profiles. - Canonical: https://www.anchorterminal.com/people/charles-o-neill/ - Markdown: https://www.anchorterminal.com/people/charles-o-neill/index.md (~1,500 tokens) - Slim: https://www.anchorterminal.com/people/charles-o-neill/index.min.md (~1,330 tokens, same facts, less prose, for token-sensitive contexts) - JSON: https://www.anchorterminal.com/people/charles-o-neill/index.json (this page as data, same URL with Accept: application/json) - Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt) - API: https://www.anchorterminal.com/api/v1/index.json - MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key) - Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data) - Updated: 2026-10-28 Base Labs researcher; model technical report co-author. - X: https://x.com/oneill_c ## What Charles builds - [elephant-1](https://www.anchorterminal.com/tools/elephant-1.md), graded D, 47.6/100, in Decision models. elephant-1 is Base Labs' open-weight 9B decision model, a full fine-tune of Qwen3.5-9B that returns a probability for every option of typed questions about a state in one prefill. Base Labs is Baseten's research lab. Base Labs researcher; model technical report co-author, researched 2026-10-27. - [mammoth-1](https://www.anchorterminal.com/tools/mammoth-1.md), graded D, 47.7/100, in Decision models. mammoth-1 is Base Labs' open-weight 27B decision model, a full fine-tune of Qwen3.5-27B that returns a probability for every option of each question about a state, without generating text. Base Labs is Baseten's research lab. Base Labs researcher; model technical report co-author, researched 2026-10-27. ## Works with - [Aaryam Sharma](https://www.anchorterminal.com/people/aaryam-sharma/), Model performance researcher; model technical report co-author - [Amir Haghighat](https://www.anchorterminal.com/people/amir-haghighat/), Co-founder and CTO - [Max Kirkby](https://www.anchorterminal.com/people/max-kirkby/), Base Labs research co-lead; model technical report co-author - [Michael Psenka](https://www.anchorterminal.com/people/michael-psenka/), Base Labs founding principal research scientist and lead; model technical report co-author - [Pankaj Gupta](https://www.anchorterminal.com/people/pankaj-gupta/), Co-founder - [Phil Howes](https://www.anchorterminal.com/people/phil-howes/), Co-founder and Chief Scientist - [Thomas Villeneuve](https://www.anchorterminal.com/people/thomas-villeneuve/), Research scientist; model technical report co-author - [Tuhin Srivastava](https://www.anchorterminal.com/people/tuhin-srivastava/), Co-founder and CEO ## Backed by - [IVP](https://www.anchorterminal.com/investors/ivp/) - [CapitalG](https://www.anchorterminal.com/investors/capitalg/) - [01 Advisors](https://www.anchorterminal.com/investors/01-advisors/) - [Altimeter Capital](https://www.anchorterminal.com/investors/altimeter-capital/) - [Battery Ventures](https://www.anchorterminal.com/investors/battery-ventures/) - [BOND](https://www.anchorterminal.com/investors/bond/) - [BoxGroup](https://www.anchorterminal.com/investors/boxgroup/) - [Blackbird Ventures](https://www.anchorterminal.com/investors/blackbird-ventures/) - [Conviction](https://www.anchorterminal.com/investors/conviction/) - [Greylock](https://www.anchorterminal.com/investors/greylock/) - [NVIDIA](https://www.anchorterminal.com/investors/nvidia/) - [Sands Capital](https://www.anchorterminal.com/investors/sands-capital/) - [Wellington Management](https://www.anchorterminal.com/investors/wellington-management/) ## Questions ### Who is Charles O’Neill? Charles O’Neill is base Labs researcher; model technical report co-author. ### What does Baseten make? Anchor Terminal lists elephant-1 and mammoth-1 from Baseten. elephant-1 is Base Labs' open-weight 9B decision model, a full fine-tune of Qwen3.5-9B that returns a probability for every option of typed questions about a state in one prefill. Base Labs is Baseten's research lab. ### Who has invested in Baseten? The sources our research read name IVP, CapitalG, 01 Advisors, Altimeter Capital, Battery Ventures, BOND, BoxGroup, Blackbird Ventures, Conviction, Greylock, NVIDIA, Sands Capital and Wellington Management. ### How are Charles's tools graded? elephant-1 is graded D, 47.6 out of 100; mammoth-1 is graded D, 47.7 out of 100, on Anchor Terminal's benchmark, which scores every listing against the same checklist. ## Sources - https://www.baseten.co/about-us/ - https://www.linkedin.com/in/tuhin-srivastava/details/experience/ - https://www.linkedin.com/in/tuhin-srivastava/ - https://www.linkedin.com/in/amirhaghighat/details/experience/ - https://www.linkedin.com/in/amirhaghighat/ - https://www.linkedin.com/in/philhowes/details/experience/ - https://www.linkedin.com/in/philhowes/ - https://www.linkedin.com/in/pankajcraft/details/experience/ - https://www.linkedin.com/in/pankajcraft/ - https://labs.baseten.co/articles/mammoth-1-and-elephant-1-frontier-decision-models - https://maxkirkby5.github.io - https://www.linkedin.com/in/max-kirkby15/ - https://x.com/maxkirkby - https://www.michaelpsenka.io - https://linkedin.com/in/michael-psenka - https://x.com/michaelpsenka - https://www.baseten.co/author/thomas-villeneuve/ - https://www.linkedin.com/in/thomas-villeneuve - https://www.baseten.co/author/aaryam-sharma/ - https://ca.linkedin.com/in/aaryam-sharma-289903218 - https://x.com/oneill_c - https://www.baseten.co/ - https://www.baseten.co - https://x.com/baseten - https://docs.baseten.co/ - https://huggingface.co/baselabs/elephant-1 - https://huggingface.co/baselabs/mammoth-1 These are the people building the tools we list, named for their public role in the company or project behind a listing, from public pages, with the date it was researched. They don't work for Anchor Terminal (our own team is on the about page, /about/#author). We show public roles, public profiles and what the listing pages show, nothing private. To correct something, send an about or a photo, or have a page removed, write to privacy@anchorterminal.com. --- Query this catalogue directly over MCP: https://www.anchorterminal.com/mcp (Streamable HTTP, no key). How: https://www.anchorterminal.com/agents/#mcp