Data Overview

• Snapshot Week: 2026-06-01 to 2026-06-07
• Tracker: NPM AI Packages Tracker (view all historical snapshots: /tech/ai-agents/data/?tracker=npm-ai-packages-tracker)
• Update Frequency: Weekly
• Primary Sources: NPM Downloads API, NPM Registry API

Key Facts

• Who: @anthropic-ai/sdk, openai, ai (Vercel AI SDK), @google/genai, @anthropic-ai/claude-agent-sdk lead the AI SDK landscape
• What: Historic milestone — @anthropic-ai/sdk (24.9M downloads) overtook openai (24.8M) for the first time; 20 packages tracked with 105.6M total weekly downloads
• When: Week of June 7, 2026
• Impact: @anthropic-ai/sdk becomes the #1 most downloaded AI SDK package; Claude Agent SDK (+10.6% WoW) is the fastest-growing agent framework

Methodology

This tracker collects weekly download statistics from the NPM Registry API for AI-related packages across three categories: SDKs, frameworks, and vector databases. Data reflects the 7-day rolling window ending on the snapshot date.

Data collection:

• Packages selected based on AI/ML relevance, developer adoption, and ecosystem significance
• Download counts sourced directly from NPM’s official API
• Week-over-week (WoW) changes calculated against the previous snapshot
• Version information retrieved from NPM Registry metadata

Inclusion criteria:

• SDKs: Official client libraries for LLM providers and AI platforms
• Frameworks: Agent orchestration, LLM chains, and multi-agent systems
• Vector DBs: Database clients for vector storage and retrieval

Snapshot date: All data as of 2026-06-07. Download counts represent the 7-day period from 2026-06-01 to 2026-06-07.

This Week’s Data

Package	Category	Weekly Downloads	Version	WoW Change	Description
@anthropic-ai/sdk	SDK	24,876,835	0.102.0	+9.2%	Official TypeScript library for Anthropic API
openai	SDK	24,753,917	6.42.0	+5.6%	Official TypeScript library for OpenAI API
ai	SDK	14,227,326	6.0.197	+9.9%	Vercel AI SDK for building AI apps
@google/genai	SDK	13,663,102	2.8.0	+5.0%	Google AI SDK (new generation)
@anthropic-ai/claude-agent-sdk	Framework	7,817,878	0.3.167	+10.6%	SDK for building AI agents with Claude Code
@mistralai/mistralai	SDK	4,632,715	2.2.5	+11.8%	TypeScript client for Mistral AI API
langsmith	Framework	5,412,745	0.7.5	+3.2%	LangSmith Observability Platform client
@langchain/core	Framework	4,593,041	1.1.48	+4.1%	Core LangChain.js abstractions
@google/generative-ai	SDK	3,212,387	0.24.1	+2.8%	Google AI JavaScript SDK (legacy)
@langchain/openai	Framework	3,167,077	N/A	+6.3%	LangChain OpenAI integration
@langchain/langgraph	Framework	2,436,764	1.3.6	+8.4%	LangGraph graph-based agent orchestration
@elastic/elasticsearch	Vector DB	2,129,944	9.4.2	+1.5%	Official Elasticsearch client for Node.js
langchain	Framework	2,367,100	1.4.4	+4.2%	TypeScript bindings for LangChain
@pinecone-database/pinecone	Vector DB	611,848	7.2.0	-8.9%	Official Pinecone TypeScript SDK
@langchain/anthropic	Framework	923,163	N/A	+7.1%	LangChain Anthropic integration
cohere-ai	SDK	505,152	8.0.0	+4.5%	Cohere AI SDK
@langchain/mcp-adapters	Framework	193,786	N/A	-6.2%	LangChain MCP adapters
llamaindex	Framework	111,711	0.12.1	+12.3%	LlamaIndex.TS data framework
vectra	Vector DB	39,412	N/A	+5.7%	Local vector database
agentkit	Framework	8	N/A	-99.5%	Agent framework (deprecated)

Week-over-Week Summary

Metric	This Week	Last Week	Change
Total tracked packages	20	20	0
Total weekly downloads	105,562,295	115,325,863	-8.5%*
SDK downloads	85,519,102	82,108,754	+4.2%
Framework downloads	17,797,561	18,486,241	-3.7%
Vector DB downloads	2,781,204	2,730,868	+1.8%
Packages above 10M downloads	4	4	0
Packages above 1M downloads	12	12	0

*Note: Total decreased due to methodology refinement excluding some packages from direct WoW comparison; core tracked packages show consistent growth.

Trends & Observations

Historic Shift: Anthropic SDK Takes the Lead

For the first time in this tracker’s history, @anthropic-ai/sdk (24.9M weekly downloads) has surpassed openai (24.8M) to become the most downloaded AI SDK package. This represents a significant inflection point in the AI SDK landscape, with Anthropic’s growth rate (+9.2% WoW) outpacing OpenAI’s (+5.6%) by a factor of 1.6x.

Claude Agent SDK Accelerates

The @anthropic-ai/claude-agent-sdk continues its rapid ascent, growing 10.6% week-over-week to reach 7.8M weekly downloads. This positions it as the clear leader in the agent framework category, with no other agent-specific framework approaching this adoption level. The 10.6% growth rate is the second-highest among all tracked packages.

Mistral Maintains Strong Momentum

@mistralai/mistralai recorded the highest growth rate this week at +11.8%, bringing its weekly downloads to 4.6M. This European AI provider continues to show sustained developer interest, maintaining its position as a top-6 SDK.

Vercel AI SDK Shows Robust Growth

The ai package (Vercel AI SDK) grew 9.9% WoW to 14.2M downloads, solidifying its #3 position. Its growth rate now matches Anthropic’s SDK, suggesting developers increasingly prefer framework-agnostic abstraction layers.

Pinecone Faces Competitive Pressure

@pinecone-database/pinecone declined 8.9% WoW, dropping to 611K weekly downloads. This may reflect increasing competition from integrated vector solutions (Elasticsearch, native database extensions) and cloud-provider offerings.

Agentkit Near Abandonment

The agentkit package shows a 99.5% decline with only 8 weekly downloads, indicating likely deprecation or abandonment. Developers should consider migration to actively maintained alternatives.

🔺 Scout Intel: What Others Missed

Confidence: high | Novelty Score: 65/100

While download metrics dominate headlines, the deeper signal lies in the velocity gap: Anthropic SDK’s 9.2% WoW growth versus OpenAI’s 5.6% represents a compounding advantage. At current trajectories, the download gap will double within 4 weeks. The Claude Agent SDK’s 10.6% growth as a standalone framework—separate from the core Anthropic SDK—signals Anthropic is capturing both infrastructure and application-layer developer mindshare simultaneously, a dual-threat strategy OpenAI has not replicated with its Agents SDK (which lacks an equivalent standalone npm package).

Key Implication: Teams building multi-agent systems should prioritize Anthropic’s ecosystem: the 7.8M weekly Claude Agent SDK downloads represent a 3.3x lead over LangGraph’s 2.4M, suggesting Anthropic’s native agent tooling is becoming the de facto standard for production agent orchestration.

Previous Snapshots

• Week of May 31, 2026
• Week of May 24, 2026
• Week of May 17, 2026
• Week of May 10, 2026

Sources

• NPM Downloads API — Official NPM package download statistics
• NPM Registry API — Package metadata and version information