Blog — Oct 2025 till Aug 2025
Updates, tutorials, and engineering deep-dives on building AI agents, workflows, and TypeScript tooling with Mastra.
All posts
Introducing Mastra Model Router: 600+ models, one API, zero package installs
Access 600+ LLM models from 40+ providers with a single string. Full TypeScript autocomplete turns your IDE into a model search engine.
Tyler BarnesModels & RoutingOct 8, 2025Announcing our $13m seed round from YC, pg, Gradient, Amjad, Guillermo, Balaji, and 120+ others
Mastra secures $13m from a coalition of legendary investors to fuel AI agent development and production.
Sam BhagwatCompanyOct 6, 2025Migration Guide: VNext to Standard APIs
Learn how to migrate from Mastra’s VNext streaming methods to the new standard APIs, with details on renaming, compatibility, and key differences between AI SDK v4 and v5.
Sam BhagwatModels & RoutingOct 3, 2025Mastra Changelog 2025-10-03
New model router and automatic model fallbacks.
Shane ThomasChangelogOct 1, 2025Model fallbacks: Your safety net for production AI
Model fallbacks ensure your application stays online by automatically switching to backup models when your primary provider fails.
Sam BhagwatModels & RoutingSep 30, 2025Mastra now supports AI Tracing
Mastra introduces AI Tracing: filter out noise and use multiple observability platforms.
Sam BhagwatObservabilitySep 26, 2025Adding agent templates into existing projects
You can now easily merge Mastra agent templates into your existing projects with just a few clicks.
Nik AiyerDeploymentSep 25, 2025Mastra Changelog 2025-09-25
New streaming architecture, scoring improvements, and more.
Shane ThomasChangelogSep 25, 2025The next evolution of Mastra streaming
We're making our new streaming architecture the default experience starting from `@mastra/core v0.19.0.`
Sam BhagwatMulti-agentSep 18, 2025Mastra Changelog 2025-09-18
Resumable streams, structured output API change, bundling overhaul, and more.
Shane ThomasChangelogSep 18, 2025Building agentic copilots with CopilotKit and Mastra
Learn how to build interactive, real-time agentic apps using CopilotKit as a frontend for Mastra agents.
Sam BhagwatVoice & UISep 16, 2025Introducing Output Processors
Introducing output processors: the gatekeepers that sit between your language model's response and your users.
Sam BhagwatTools & IntegrationsSep 8, 2025Mastra Changelog 2025-09-08
Zod v4 support with v3 compatibility and more.
Shane ThomasChangelogSep 5, 2025Introducing Cloneable Scorers
Cloneable scorers let you copy, customize, and extend Mastra’s evals into your project.
Sam BhagwatEvalsAug 26, 2025Introducing Mastra's improved agent orchestration with AI SDK v5 support
Mastra now controls the agent loop and tool calling with increased orchestration capabilities—while maintaining backward compatibility with AI SDK v4 and v5.
Sam BhagwatModels & Routing