Glean
Glean indexes SaaS, docs and chat with permissions-aware retrieval, then layers assistants and agents on the resulting knowledge graph.
Full Glean record →Head to head
Glean vs ChatGPT Deep Research
Glean (Glean) and ChatGPT Deep Research (OpenAI) both sit in Search & Research. ChatGPT Deep Research is the cheaper entry point at from $20/mo. Glean shipped more tracked changes in the last 30 days (6 vs 5). Every value below comes from the latest crawl of the vendors' own pages.
| Attribute | Glean Glean | ChatGPT Deep Research OpenAI |
|---|---|---|
| Segment | Search & Research | Search & Research |
| Version | June 2026 | gpt-6-astra |
| Entry cost | from $100/mo | from $20/mo |
| Pricing tiers | Enterprise free | Free free · Plus $20 · Pro $200 |
| Model stack | 40+ Unique LLMs ( · Claude · growing!) · Model hub (supports 40+ LLMs) | GPT-5.2 Thinking · gpt-5.6 · gpt-6-astra · o3 (optimized version) · o4-mini (lightweight version) |
| Context window | Model-dependent | 196K tokens |
| Public API | ||
| Routes models | ||
| Changes / 30d | 6 | 5 |
| Origin | Global | Global |
| Capabilities | Permissions-aware search, Knowledge graph, Glean Agents, 100+ connectors, Assistant, Enterprise Search, Glean Assistant, Agent Builder | Multi-step browsing, Cited reports, Python analysis, File and image reading, Deep research, Specialized models, Web search, Agents |
ChatGPT Deep Research
An agentic mode that browses for many minutes and returns a cited report.
Full ChatGPT Deep Research record →