Who is building the agent operating system?
Twelve dimensions across seven providers. Re-graded as announcements land, with the market's reaction shown alongside.
OpenAI · Developer APIs
Platform leverage · updated 2026-06-01
The reference developer platform: tool use, structured output, Assistants, fine-tuning, scale.
Breadth, quality, and economics of the APIs developers build on. Tool use, structured output, fine-tuning, embeddings, agent frameworks: the leverage that turns a model into a platform.
- MarketLeaders, gainers and unexpected winners in the Enterprise AI arms raceAndreessen Horowitz (a16z) · 2026-01-30
An enterprise survey: OpenAI still leads adoption but Anthropic and Google gain fast, a multi-vendor oligopoly.
- NewsOpenAI, Anthropic, and Block join Linux Foundation effort to standardize the AI agent eraTechCrunch · 2025-12-09
Anthropic donates MCP to the new Agentic AI Foundation, so MCP shifts from vendor project to neutral infrastructure.
- PrimaryOne Year of MCP: November 2025 Spec ReleaseModel Context Protocol · 2025-11-25
MCP's rise from open-source experiment to de facto standard adopted across OpenAI, Microsoft, GitHub, and Google.
- PrimaryIntroducing AgentKitOpenAI · 2025-10-06
DevDay launch of AgentKit and the MCP-based Apps SDK, turning ChatGPT's 800M users into a developer distribution channel.
- PrimaryIntroducing GPT-5OpenAI · 2025-08-07
OpenAI's launch of GPT-5 as a unified system that decides when to answer fast vs reason longer, priced to maximize reach.
- AnalysisAI Engineering Goes MainstreamLatent Space · 2025-06-13
AI engineering matures into a vertical; agents, reasoning, and orchestration tooling are the practical frontier.