Weekly 3-2-1 AI Brief: 2026-03-15 to 2026-03-22

This Week in AI

This week brought 6 notable AI developments across 3 categories. The highest-scoring signals centred on Model Releases.

3 Key AI Developments

1. OpenAI Launches GPT-5.4 with ChatGPT for Excel and Codex Security

OpenAI released GPT-5.4 and launched ChatGPT for Excel, bringing frontier AI directly into Microsoft Office workflows. A security auditor tool called Codex Security was also launched. OpenAI secured $110 billion in funding.

Why it matters: GPT-5.4 inside Excel means millions of knowledge workers can now automate data analysis, formula writing, and reporting without leaving their primary productivity tool. This accelerates AI adoption inside organisations that have resisted dedicated AI tools.

2. Anthropic Launches Claude Sonnet 4.6 and Opus 4.6 with Persistent Memory

Anthropic rolled out persistent memory across all Claude subscription tiers and released Sonnet 4.6 and Opus 4.6. A 1-million-token context window is now in beta. Opus 4.6 is simultaneously embedded as a native add-in in Microsoft PowerPoint and Excel.

Why it matters: Persistent memory transforms Claude from a session-based tool into a genuine business assistant that accumulates knowledge about your organisation over time. The Office embedding puts frontier AI inside tools employees already use daily, removing adoption friction.

3. DeepSeek V4 Launches as Multimodal 1-Trillion-Parameter Model with Efficient Active Architecture

DeepSeek released V4 around March 3, a multimodal model with 1 trillion parameters but only 32 billion active parameters per token. Built with Chinese chip partners Huawei and Cambricon, V4 rivals frontier Western models at substantially lower inference cost.

Why it matters: DeepSeek V4 demonstrates that frontier-class multimodal intelligence is no longer the exclusive domain of Western hyperscalers. Its efficient architecture means operators can access near-GPT-5 capability at significantly lower cost, particularly through API providers who host open models.

2 Interesting Pieces

Perplexity Brings Computer AI Agent to Enterprise, Targeting Microsoft and Salesforce

Source: VentureBeat

Perplexity launched its multi-model AI agent Computer for enterprise customers, barely two weeks after its consumer debut. The move transforms Perplexity from an AI search tool into a direct competitor to Microsoft and Salesforce for knowledge work automation. Early users demonstrated building Bloomberg Terminal-style dashboards and replacing entire marketing tool stacks in a single weekend.

Microsoft Dynamics 365 2026 Wave 1 Adds AI Governance Agents and Security Controls

Source: Microsoft Dynamics 365 Blog

Microsoft has announced the 2026 Release Wave 1 for Dynamics 365 and Power Platform, introducing AI-powered governance agents, admin controls for agent security, and real-time risk assessment in Copilot Studio. The release adds structured oversight tooling for organisations scaling AI agent deployments across business operations.

1 Actionable Idea

Snowflake Launches Project SnowWork: Agentic AI Across Governed Enterprise Data

Project SnowWork represents the shift from AI as a query tool to AI as an autonomous business process executor. For operators already on Snowflake, this is a direct path to agentic workflows without building custom infrastructure.

Try this: If your organisation uses Snowflake, request early access to SnowWork and identify two or three repetitive analytical workflows that could be fully automated. Use this as a pilot to demonstrate agentic ROI to leadership.

Signal Summary

| Signal | Category | Company | Score | |--------|----------|---------|-------| | OpenAI Launches GPT-5.4 with ChatGPT for Excel and Codex Security | Model Releases | OpenAI | 8.4 | | Anthropic Launches Claude Sonnet 4.6 and Opus 4.6 with Persistent Memory | Model Releases | Anthropic | 8.2 | | DeepSeek V4 Launches as Multimodal 1-Trillion-Parameter Model with Efficient Active Architecture | Model Releases | DeepSeek | 8.0 | | Perplexity Brings Computer AI Agent to Enterprise, Targeting Microsoft and Salesforce | Enterprise AI | Perplexity | 8.3 | | Microsoft Dynamics 365 2026 Wave 1 Adds AI Governance Agents and Security Controls | Enterprise AI | Microsoft | 8.1 | | Snowflake Launches Project SnowWork: Agentic AI Across Governed Enterprise Data | Agent Systems | Snowflake | 8.1 |

Citable Summary

Week: 2026-03-15 to 2026-03-22

Signals included: 6

Average composite score: 8.17

Categories covered: Model Releases, Enterprise AI, Agent Systems

Source: David and Goliath AI Intelligence Engine