Anthropic
Claude Opus 4.6, Sonnet 4.5, and Haiku 4.5 with extended thinking, agent teams, MCP integration, and up to 1M token context windows.
usage-based
Open ToolAutoGen
Microsoft's multi-agent conversation framework (autogen-agentchat). Now in maintenance mode as it merges into the unified Microsoft Agent Framework targeting Q1 2026 GA.
open-source
Open ToolOpenAI
GPT-5.2 and o-series reasoning models with the Responses API, AgentKit, and built-in tools for web search, code execution, and computer use.
usage-based
Open ToolPinecone
Serverless vector database with integrated inference (embed + store + query in one call), Pinecone Assistant for managed RAG, and dedicated read nodes.
usage-based
Open Tool