Architecturally distinct approach. Self-reported but methodology is published in detail.
Claude Research
activeMulti-agent research system — Opus 4 lead + Sonnet 4 subagents. 90.2% improvement over single-agent (self-reported). 1M context, Agent SDK for custom pipelines.

Where it wins
Multi-agent architecture: Opus 4 lead + Sonnet 4 subagents running in parallel
90.2% improvement over single-agent on internal eval (methodology published)
1M context window (Opus 4.6, Feb 2026)
Agent SDK enables custom research pipelines
Strong at long-form synthesis and citation quality
Where to be skeptical
90.2% improvement claim is self-reported — no independent benchmark validation
No dedicated HN thread for Claude research specifically
Lower independent community signal than Perplexity (368 pts), NotebookLM (907 pts), Tongyi (365 pts)
No standalone research product — embedded in Claude Pro/Max
Editorial verdict
#7 in research. Architecturally distinct multi-agent approach is theoretically superior, but 90.2% improvement claim is self-reported with no independent validation. No dedicated HN thread for Claude research. Promising but needs third-party benchmarks to justify a higher ranking.
Related

GPT Researcher
89Open-source autonomous deep research agent. CMU DeepResearchGym #1 on citation quality, report quality, info coverage. 25.8K stars, 15.9K weekly PyPI downloads. Apache 2.0.

Tongyi DeepResearch
82First fully open-source deep research agent matching closed-source leaders on benchmarks. HLE 32.9 (exceeds OpenAI's 26.6), 30.5B params / 3.3B active (MoE), runs locally. 18.5K stars. Apache 2.0.

STORM (Stanford)
66Stanford's LLM-powered knowledge curation system. Generates Wikipedia-style articles with citations in ~3 min. 28K stars, 84.8% citation recall / 85.2% precision (peer-reviewed). MIT license.

Perplexity Deep Research
43Research-first search engine with inline citations. Fastest deep research (15-30s), 93.9% SimpleQA accuracy, 50+ sources per report. $20/mo Pro.
Public evidence
1M context competitive with Gemini. Agent SDK enables custom research pipelines.
Lower independent community signal compared to competitors. Most Claude discussion is general, not research-specific.
Raw GitHub source
GitHub README could not be fetched right now.