These tools competes with

Anthropic APIvsOpenAI API

Claude models API by Anthropic versus GPT-4o, o1, and embeddings from OpenAI

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Side-by-side comparison

Field
Anthropic API
OpenAI API
Category
LLM Infrastructure
LLM Infrastructure
Type
Commercial
Commercial
Free Tier
✗ No
✗ No
Pricing Plans
API: Per token
API: Per token
GitHub Stars
—
—

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.

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OpenAI API

API access to GPT-4o, o1, and other OpenAI models including embeddings and image generation. The most widely used LLM API in production.

Website ↗

Shared Connections14 tools both integrate with

CrewAIAutoGenLangChainLlamaIndexMastraPydanticAIsmolagentsAgnoLiteLLMPortKeyHeliconeMistral APIVercel AI SDKStainless

Only Anthropic API (1)

OpenAI API

Only OpenAI API (5)

LangfuseAnthropic APICohere APIGroqTogether AI

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See how Anthropic API and OpenAI API fit into the bigger picture — 123 tools, 283 relationships, all mapped.

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