These tools integrates with

Anthropic APIvsClaude Agent SDK

Claude models API by Anthropic versus Anthropic's official agent SDK

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Choose Anthropic API when…

  • •You need long context windows (200k tokens)
  • •Safety, reliability, and reasoning quality matter most
  • •You're building agents that require deep code understanding

Choose Claude Agent SDK when…

  • •You are building Claude-first production agents
  • •You want native MCP and sub-agent primitives
  • •You want a first-party Anthropic SDK with prompt caching

Side-by-side comparison

Field
Anthropic API
Claude Agent SDK
Category
LLM Infrastructure
Agent Frameworks
Type
Commercial
Open Source
Free Tier
✗ No
✓ Yes
Pricing Plans
API: Per token
OSS: Free
GitHub Stars
—
—
Health
—
●80 — Active

Anthropic API

API access to Claude model family including Claude 3.5 Sonnet, Haiku, and Opus. Excels at coding, analysis, long-context tasks, and safety-critical applications.

Website ↗

Claude Agent SDK

Anthropic's first-party agent SDK for building production agents on top of Claude. Native MCP support, sub-agents, tool use, and prompt caching out of the box. Routinely benchmarked alongside Strands, LangGraph, and the OpenAI Agents SDK in 2026 framework comparisons.

Website ↗GitHub ↗

Only Anthropic API (21)

CrewAILangChainAutoGenLlamaIndexMastraPydanticAIsmolagentsAgnoLiteLLMPortKey

Only Claude Agent SDK (5)

OpenAI Agents SDKLangGraphMicrosoft Agent FrameworkAnthropic APIMCP SDK (Python)

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See how Anthropic API and Claude Agent SDK fit into the bigger picture — 235 tools, 543 relationships, all mapped.

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