These tools integrates with

OpenAI APIvsMastra

GPT-5 era models, embeddings, and Responses API from OpenAI versus TypeScript AI agent framework by Vercel contributors

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Choose OpenAI API when…

  • •You need the broadest ecosystem and most integrations
  • •GPT-4 or o-series reasoning models are required
  • •Assistants API, fine-tuning, or batch API are needed

Choose Mastra when…

  • •You're building TypeScript-native agentic workflows
  • •You want a structured framework for agent + RAG apps
  • •Node.js backend with AI logic is your stack

Side-by-side comparison

Field
OpenAI API
Mastra
Category
LLM Infrastructure
Agent Frameworks
Type
Commercial
Open Source
Free Tier
✗ No
✓ Yes
Pricing Plans
API: Per token
—
GitHub Stars
—
⭐ 8,000
Health
—
●95 — Active

OpenAI API

API access to GPT-5, GPT-5.5, o3/o4 reasoning models, and the Responses API; plus embeddings, image, audio, and Realtime endpoints. The most widely deployed LLM API in production.

Website ↗

Mastra

TypeScript-first framework for building AI agents and workflows. Supports tool use, memory, RAG, and evals with first-class Vercel AI SDK integration.

Website ↗GitHub ↗

Shared Connections3 tools both integrate with

LangfuseAnthropic APIVercel AI SDK

Only OpenAI API (36)

CrewAIAutoGenLlamaIndexLangChainPydanticAIsmolagentsAgnoMastraLiteLLMPortKey

Only Mastra (1)

OpenAI API

Explore the full AI landscape

See how OpenAI API and Mastra fit into the bigger picture — 235 tools, 543 relationships, all mapped.

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