OpenAI API vs Notion
Frontier models: GPT-5, o-series reasoning, image, audio, embeddings
vs. All-in-one workspace — docs, wikis, databases, projects, AI
Pricing tiers
OpenAI API
Free Tier (Trial)
$5 free credit for new accounts. Rate-limited.
Free
Pay-as-you-go
No monthly min. Per-token pricing by model.
$0 base (usage-based)
Usage Tiers (1-5)
Automatic tier promotion based on cumulative spend. Higher tiers = higher rate limits + new model access.
$0 base (usage-based)
Enterprise
Custom. Priority access, SLA, dedicated capacity.
Custom
Notion
Free
$0. Unlimited blocks for personal use, 5MB file uploads, 7-day version history. Max 10 collaborators.
Free
Notion AI (add-on)
$8/user/mo. Add AI to Plus. Free on Business and above.
$8/mo
Plus
$10/user/mo annual ($12/mo). Unlimited blocks for teams, unlimited file uploads, 30-day history.
$10/mo
Business
$15/user/mo annual ($18/mo). SAML SSO, private teamspaces, bulk export, 90-day history, Notion AI included.
$15/mo
Enterprise
$25/user/mo (est). SCIM, audit log, unlimited history, dedicated success manager.
$25/mo
Free-tier quotas head-to-head
Comparing free-tier on OpenAI API vs free on Notion.
| Metric | OpenAI API | Notion |
|---|---|---|
| No overlapping quota metrics for these tiers. | ||
Features
OpenAI API · 12 features
- Assistants API — Stateful assistants with tools, threads, file search.
- Batch API — 50% discount for async processing within 24h.
- Chat Completions API — Classic /v1/chat/completions endpoint.
- Files API — Upload docs for retrieval, fine-tuning, batch.
- Fine-Tuning — Supervised + DPO fine-tuning for GPT-4o, GPT-4.1, GPT-4o-mini.
- Function Calling — JSON-schema tool calling; parallel calls supported.
- Moderation — Safety classifier API (free).
- Prompt Caching — Auto-cache repeated prefixes; 50% cheaper cached hits.
- Realtime API — WebSocket streaming voice + text with low latency.
- Responses API — Stateful conversational API.
- Structured Outputs — Enforced JSON schema compliance.
- Vision — Image input for GPT models.
Notion · 16 features
- Databases — Relational data with views.
- Database Views — Table, board, gallery, calendar, timeline, list.
- Desktop Apps — Native Mac + Windows.
- Docs — Wiki + docs with rich editor.
- Formulas 2.0 — JS-like expressions.
- Granular Permissions — Per-page + teamspace ACLs.
- iOS + Android Apps — Native mobile.
- Notion AI — AI assist for writing + Q&A.
- Notion Calendar — Native calendar (ex-Cron).
- Notion Mail — Email client integrated.
- Relations + Rollups — Cross-DB linking + aggregations.
- REST API — Integrations + automations.
- Sync Databases — Pull external sources.
- Teamspaces — Isolated areas per team.
- Template Gallery — 10,000+ community templates.
- Widgets + Embeds — Third-party embeds.
Developer interfaces
| Kind | OpenAI API | Notion |
|---|---|---|
| SDK | openai-dotnet, openai-go, openai-node, openai-python | @notionhq/client |
| REST | OpenAI REST API | Notion REST API |
| MCP | OpenAI MCP | Notion MCP (official) |
| OTHER | Realtime API (WebSocket) | Notion AI, Notion Apps, OAuth 2.0 (public) |
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