These tools integrates with
OpenAI APIvsZep
GPT-5 era models, embeddings, and Responses API from OpenAI versus Long-term memory and session management for AI assistants
Compare interactively in Explore →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 Zep when…
- •You're building a conversational AI assistant that needs session continuity
- •You need structured fact and entity extraction from conversation history
- •You want temporal memory — your AI knowing when it learned something
Side-by-side comparison
Field
OpenAI API
Zep
Category
LLM Infrastructure
Memory & Persistence
Type
Commercial
Open Source
Free Tier
✗ No
✓ Yes
Pricing Plans
API: Per token
Cloud: $99/mo
GitHub Stars
—
⭐ 4,000
Health
—
●60 — Slowing
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.
Shared Connections2 tools both integrate with
Only OpenAI API (37)
CrewAIAutoGenLlamaIndexPydanticAIsmolagentsAgnoMastraLiteLLMPortKeyLangfuse
Only Zep (4)
LangGraphOpenAI APICogneeGraphiti
Explore the full AI landscape
See how OpenAI API and Zep fit into the bigger picture — 235 tools, 543 relationships, all mapped.