# Andrew Bosworth (slim) > Andrew Bosworth is CTO, Meta at and head of Reality Labs and chief Technology Officer. Llama Guard 4, LlamaFirewall, Meta Marketing API, Meta Model API, Muse Code, Muse Glimmer 30B, Muse Spark Open and WhatsApp Business Platform (Cloud API) on Anchor Terminal, with grades, an about and public profiles. - Full: https://www.anchorterminal.com/people/andrew-bosworth/index.md (~2,600 tokens) · this version ~2,330 tokens · JSON https://www.anchorterminal.com/people/andrew-bosworth/index.json · canonical https://www.anchorterminal.com/people/andrew-bosworth/ - Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-28 - Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data) CTO, Meta, and head of Reality Labs. Andrew Bosworth is Meta's chief technology officer and heads its Reality Labs division. ## What Andrew builds - [Llama Guard 4](https://www.anchorterminal.com/tools/llama-guard.md), graded D, 49.5/100, in Guardrails & safety filters. Llama Guard 4 is Meta's 12-billion-parameter open-weight safety classifier for text and images. It labels a prompt or a model response safe or unsafe against 14 hazard categories, and the owner runs it on a GPU. CTO, Meta, and head of Reality Labs, researched 2026-10-28. - [LlamaFirewall](https://www.anchorterminal.com/tools/llamafirewall.md), graded D, 51.1/100, in Guardrails & safety filters. LlamaFirewall is Meta's open-source Python library for screening an AI agent's inputs, tool results and outputs. It runs scanners for prompt injection, hidden characters, insecure generated code and goal drift, and returns allow, block or human review. CTO, Meta, and head of Reality Labs, researched 2026-10-28. - [Meta Marketing API](https://www.anchorterminal.com/tools/meta-marketing-api.md), graded B, 67.7/100, in Advertising & campaign operations. Meta's Marketing API creates and manages campaigns, ad sets, ads, creatives and audiences across Facebook, Instagram, Messenger and WhatsApp, and reports performance through Ads Insights. It is a versioned Graph API with OAuth access tokens. Chief Technology Officer, researched 2026-10-28. - [Meta Model API](https://www.anchorterminal.com/tools/meta-model-api.md), graded D, 52.5/100, in Model APIs & inference. Meta Model API is Meta's pay-as-you-go API for its hosted Muse models, including Muse Wonder and Muse Spark, through OpenAI-style Responses and Chat Completions endpoints and an Anthropic-style Messages endpoint, plus image, speech and segmentation routes. CTO, Meta, and head of Reality Labs, researched 2026-10-28. - [Muse Code](https://www.anchorterminal.com/tools/muse-code.md), graded C, 61.4/100, in Agent harnesses. Muse Code is Meta's coding agent for the terminal and CI, built for its Muse models. It plans, edits files and runs commands under approvals and an OS sandbox, interactively, headless through `muse exec` or from an SDK. CTO, Meta, and head of Reality Labs, researched 2026-10-28. - [Muse Glimmer 30B](https://www.anchorterminal.com/tools/muse-glimmer-30b.md), graded BB, 70/100, in Open-weight models. Muse Glimmer 30B is Meta's open-weight dense multimodal model for local agent work, 29.6B parameters with text and image input and a 128K-token context, published on Hugging Face under Apache 2.0 with GGUF and ExecuTorch builds. CTO, Meta, and head of Reality Labs, researched 2026-10-28. - [Muse Spark Open](https://www.anchorterminal.com/tools/muse-spark-open.md), graded D, 53.5/100, in Model APIs & inference. Muse Spark Open is Meta's open-weight multimodal model for coding and agentic work, with 816B total and 42B active parameters and a 1M-token context, released on 15 October 2026 under the Muse Model Licence for self-hosting. CTO, Meta, and head of Reality Labs, researched 2026-10-28. - [WhatsApp Business Platform (Cloud API)](https://www.anchorterminal.com/tools/whatsapp-cloud-api.md), graded B, 67.1/100, in Messaging APIs. Meta's WhatsApp Business Platform Cloud API sends and receives WhatsApp messages for a business phone number through the Graph API, with inbound messages and status updates arriving by webhook. Access uses a Meta developer app and OAuth access tokens. Chief Technology Officer, researched 2026-10-28. ## Works with - [Abraham Montilla](https://www.anchorterminal.com/people/abraham-montilla/), Llama Guard 4 release/model-card contributor (GitHub amontilla0) - [Alexandr Wang](https://www.anchorterminal.com/people/alexandr-wang/), Chief AI Officer, Meta, leading Meta Superintelligence Labs - [Andrew McCollum](https://www.anchorterminal.com/people/andrew-mccollum/), Co-founder, Facebook, worked there until September 2007 - [Chris Hughes](https://www.anchorterminal.com/people/chris-hughes/), Co-founder and spokesman, Facebook, left in 2007 - [Connor Treacy](https://www.anchorterminal.com/people/connor-treacy/), Meta Product Manager; Meta Model API launch-guide co-author - [Dustin Moskovitz](https://www.anchorterminal.com/people/dustin-moskovitz-2/), Co-founder, Facebook, left in 2008 - [Eduardo Saverin](https://www.anchorterminal.com/people/eduardo-saverin/), Co-founder and first CFO, Facebook, no longer with the company - [Josh Walters](https://www.anchorterminal.com/people/josh-walters/), Developer marketing; Meta Model API launch-guide co-author - [Joshua Saxe](https://www.anchorterminal.com/people/joshua-saxe/), LlamaFirewall research coauthor; former Meta security AI leader - [Mahesh Pasupuleti](https://www.anchorterminal.com/people/mahesh-pasupuleti/), Senior Engineering Leader, Meta Superintelligence Labs, AI Safety and Alignment; led Llama Guard development - [Mark Zuckerberg](https://www.anchorterminal.com/people/mark-zuckerberg/), Founder, chairman and CEO, Meta - [Sahana Chennabasappa](https://www.anchorterminal.com/people/sahana-chennabasappa/), AI Security Engineer; LlamaFirewall paper first-listed author - [Tatiana Shavrina](https://www.anchorterminal.com/people/tatiana-shavrina/), AI/ML Research Lead; Muse Glimmer research team - [Brian Acton](https://www.anchorterminal.com/people/brian-acton/), Co-founder, WhatsApp - [Chris Cox](https://www.anchorterminal.com/people/chris-cox/), Chief Product Officer - [Dina Powell McCormick](https://www.anchorterminal.com/people/dina-powell-mccormick/), President and Vice Chairman - [Jan Koum](https://www.anchorterminal.com/people/jan-koum/), Co-founder, WhatsApp ## Questions ### Who is Andrew Bosworth? Andrew Bosworth is Meta's chief technology officer and heads its Reality Labs division. ### What does Meta, Meta Platforms, Inc. make? Anchor Terminal lists Llama Guard 4, LlamaFirewall, Meta Marketing API, Meta Model API, Muse Code, Muse Glimmer 30B, Muse Spark Open and WhatsApp Business Platform (Cloud API) from Meta, Meta Platforms, Inc.. ### How are Andrew's tools graded? Llama Guard 4 is graded D, 49.5 out of 100; LlamaFirewall is graded D, 51.1 out of 100; Meta Marketing API is graded B, 67.7 out of 100; Meta Model API is graded D, 52.5 out of 100; Muse Code is graded C, 61.4 out of 100; Muse Glimmer 30B is graded BB, 70 out of 100; Muse Spark Open is graded D, 53.5 out of 100; WhatsApp Business Platform (Cloud API) is graded B, 67.1 out of 100, on Anchor Terminal's benchmark, which scores every listing against the same checklist. ## Sources - https://www.google.com/search?q=%22Llama+Guard%22+%22Meta%22+%22led+development%22 - https://www.linkedin.com/in/maheshp9 - https://github.com/meta-llama/PurpleLlama/blob/main/Llama-Guard4/12B/MODEL_CARD.md - https://github.com/meta-llama/PurpleLlama/commit/cd9fe65792343c285730c967f888a7373d7e6c17 - https://github.com/amontilla0 - https://www.meta.com/en-gb/about/leadership/mark-zuckerberg/ - https://dev.meta.ai/ - https://www.google.com/search?q=Meta+company+LinkedIn - https://dev.meta.ai/llama/docs/community-support-and-resources/ - https://github.com/meta-llama/PurpleLlama - https://dev.meta.ai/llama/docs/model-cards-and-prompt-formats/llama-guard-4/ - https://ai.meta.com/research/publications/llamafirewall-an-open-source-guardrail-system-for-building-secure-ai-agents/ - https://www.linkedin.com/in/sahana-chennabasappa-69a77576 - https://x.com/joshua_saxe - https://github.com/meta-llama/PurpleLlama/blob/main/CONTRIBUTING.md - https://github.com/meta-llama/PurpleLlama/tree/main/LlamaFirewall - https://en.wikipedia.org/wiki/Meta_Platforms - https://en.wikipedia.org/wiki/Mark_Zuckerberg - https://uk.linkedin.com/in/alexanderdavenport/details/experience/ - https://uk.linkedin.com/in/alexanderdavenport - https://www.linkedin.com/company/meta/ - https://x.com/Meta - https://developers.facebook.com/ - https://developers.facebook.com/support/ - https://dev.meta.ai/resources/blog/build-with-muse-spark - https://uk.linkedin.com/in/connort - https://www.linkedin.com/posts/joshmwalters_llama-meta-genai-activity-7358885091185426434-VPdf - https://www.linkedin.com/in/joshmwalters - https://dev.meta.ai/support/ - https://dev.meta.ai/docs/muse-glimmer - https://uk.linkedin.com/in/tatiana-shavrina/en - https://dev.meta.ai/help - https://dev.meta.ai/support - https://www.linkedin.com/in/laurenkrainski/details/experience/ - https://www.linkedin.com/in/laurenkrainski - https://business.whatsapp.com - https://www.whatsapp.com - https://developers.facebook.com/documentation/business-messaging/whatsapp/support/ - https://en.wikipedia.org/wiki/WhatsApp 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.