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AI21: AI21

AI21 builds Foundation Models and AI Systems for the enterprise\. Power your most critical enterprise workflows with accurate, reliable, and scalable AI\.

For agents: AI21 builds foundation models and enterprise AI systems, including an Intelligent Gateway, post-training, agent research blog posts, and demo contact.

foundation modelsenterprise aiai agentsgpu infrastructuredeep research

Their llms.txt

The beginning of the file, from our validated copy saved 2026-10-21T15:42:27.342Z. Cached copy · Source on ai21.com

# AI21: AI21

> AI21's Forward\-Deployed Researchers post\-train specialized models for your task, creating an AI edge your competitors can’t buy\.

Generated by Yoast SEO v28.7, this is an llms.txt file, meant for consumption by LLMs.

## Pages
- [Homepage](https://www.ai21.com/)
- [Careers](https://www.ai21.com/careers/): Join the Panorays team\. Be part of a positive, friendly environment in an ever\-growing market, with a mission to change how companies do business together\.
- [Talk to a training expert](https://www.ai21.com/contact-sales/)
- [About](https://www.ai21.com/about/)
- [Post\-Training](https://www.ai21.com/post-training/)

## Posts
- [AI21 Partners with Gong, Deel and Alice to Post\-Train Specialized Models on NVIDIA Nemotron 3\.5 Super VL](https://www.ai21.com/blog/ai21-post-trains-nvidia-nemotron-35-super-vl/)
- [The verifiability litmus test for agent design](https://www.ai21.com/blog/the-verifiability-litmus-test-for-agent-design/): A year of agent research comes down to one question: can a candidate answer be checked? We apply it to agentic search, deep research, RAG indexing and coding, with state\-of\-the\-art results on BrowseComp\-Plus, DeepResearch Bench II and SWE\-Bench Pro\.
- [The hidden mismatch: Evaluating coding agents on the work developers actually do](https://www.ai21.com/blog/evaluating-coding-agents-on-the-work-developers-actually-do/): The results challenged our assumptions about agentic coding tasks, and we used these lessons to build a robust benchmark that preserves quality on real\-world coding tasks in our intelligent gateway\.
- [From manual negotiation to automated scheduling: How AI21 manages its GPU fleet with Kueue](https://www.ai21.com/blog/how-ai21-manages-its-gpu-fleet-with-kueue/)
- [You don't need a frontier model\. You need a verifier\.](https://www.ai21.com/blog/you-need-a-verifier/)

## Glossary
- [What is an Agentic Trajectory?](https://www.ai21.com/glossary/ai-agent/what-is-an-agentic-trajectory/)
- [What is an Orchestration Layer?](https://www.ai21.com/glossary/foundational-llm/orchestration-layer/)
- [What is Model Context Protocol \(MCP\)?](https://www.ai21.com/glossary/ai-agent/what-is-model-context-protocol-mcp/)
- [What is State Mutation in AI Agents?](https://www.ai21.com/glossary/ai-agent/what-is-state-mutation-in-ai-agents/)
- [What is Parallel Subagent Execution?](https://www.ai21.com/glossary/ai-agent/what-is-parallel-subagent-execution/)

## Knowledge Hub
- [What are AI Hallucinations? Signs, Risks, \& Prevention](https://www.ai21.com/knowledge/ai-hallucinations/)
- [AI Security: Risks, Frameworks \& Best Practice](https://www.ai21.com/knowledge/ai-security/)
- [Enterprise LLM: Adoption, Use Cases \& Deployment](https://www.ai21.com/knowledge/enterprise-llm/)
- [What is Prompt Engineering? Techniques \& Use Cases](https://www.ai21.com/knowledge/prompt-engineering/)
- [What is a Foundation Model? Types, Applications \& Benefits](https://www.ai21.com/knowledge/foundation-model/
…

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