Comparison
FastChat vs LongCite
Verdict
Pick FastChat when tags unique to FastChat: chatbots, distributed serving, evaluation system, large-language-models; pick LongCite when tags unique to LongCite: benchmark, citation-generation, fine-tuning, llm.
Markdown twin · FastChat alternatives · LongCite alternatives
GraphCanon updated today
Trust & integrity
| Signal | FastChat | LongCite |
|---|---|---|
| Maintenance | Steady (71d since push) As of today · github_public_v1 | Dormant (557d since push) As of today · github_public_v1 |
| Provenance | Not a fork · Organization account As of today · github_public_v1 | Not a fork · Organization account As of today · github_public_v1 |
| Security (OSV) | No lockfile As of today · none | No lockfile As of today · none |
Tagline
- FastChat
- An open platform for training, serving, and evaluating large language models
- LongCite
- LongCite: Enabling LLMs to Generate Fine-grained Citations in Long-context QA
Stars
- FastChat
- 39k
- LongCite
- 520
Forks
- FastChat
- 4.8k
- LongCite
- 30
Open issues
- FastChat
- 1.0k
- LongCite
- 9
Language
- FastChat
- Python
- LongCite
- Python
Adopt for
- FastChat
- FastChat is a comprehensive open platform for managing large language models (LLMs) that includes capabilities for training, serving, evaluating, and comparing chatbot models via web UIs and RESTful APIs. It powers ChatB
- LongCite
- -
Persona
- FastChat
- -
- LongCite
- -
Runtime
- FastChat
- -
- LongCite
- -
License
- FastChat
- Apache-2.0
- LongCite
- Apache-2.0
Last pushed
- FastChat
- May 1, 2026
- LongCite
- Dec 31, 2024
Categories
- FastChat
- Evaluation & Observability, Inference & Serving, LLM Frameworks, Model Training
- LongCite
- Evaluation & Observability, LLM Frameworks
Trust and health
Maintenance
- FastChat
- Steady (60%)
- LongCite
- Dormant (18%)
Days since push
- FastChat
- 71d
- LongCite
- 557d
Open issues (now)
- FastChat
- 1.0k
- LongCite
- 9
Full report
- FastChat
- Trust report
- LongCite
- Trust report
Choose FastChat if…
- Tags unique to FastChat: chatbots, distributed serving, evaluation system, large-language-models.
- Also covers Inference & Serving, Model Training.
- - You are looking to train and evaluate state-of-the-art models such as Vicuna or MT-Bench.
When NOT to use FastChat
- - You require a proprietary or closed-source framework; FastChat is open-source under Apache-2.0 license and its use might be unsuitable for environments requiring proprietary solutions.
- - Your chatbot evaluation needs do not align with the types of data used in FastChat's datasets (e.g., human votes, MT-Bench evaluations).
- - You prefer a more user-friendly setup without the need to clone a repository and manually install dependencies; FastChat requires installation from source with additional steps for Rust and CMake on
- + Mac.
Choose LongCite if…
- Tags unique to LongCite: benchmark, citation-generation, fine-tuning, llm.
- Leaner open-issue backlog (9).
When NOT to use LongCite
- Last GitHub push was 558 days ago (dormant maintenance, Dec 31, 2024). Validate activity before betting a new project on LongCite.
- Evaluation & Observability: Defer heavyweight eval infra only until you have real traffic - never skip it once users depend on answers.
- LLM Frameworks: Avoid a framework for a single prompt-and-retrieve call; the abstraction can cost more than it saves.
Explore
Sources
Every stat on this page traces to a dated GitHub sync, license file, enrichment field, or trust scan.
- GitHub stars (lm-sys/FastChat) · observed Jul 11, 2026
- GitHub forks (lm-sys/FastChat) · observed Jul 11, 2026
- Last push (lm-sys/FastChat) · observed May 1, 2026
- License file (Apache-2.0) · observed Jul 11, 2026
- Decision facts (enrichment) · observed Jul 11, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
- GitHub stars (THUDM/LongCite) · observed Jul 11, 2026
- GitHub forks (THUDM/LongCite) · observed Jul 11, 2026
- Last push (THUDM/LongCite) · observed Dec 31, 2024
- License file (Apache-2.0) · observed Jul 11, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
GitHub stars on cards: FastChat 39k · LongCite 520 (synced Jul 11, 2026).
Common questions
- What is the difference between FastChat and LongCite?
- FastChat: An open platform for training, serving, and evaluating large language models. LongCite: LongCite: Enabling LLMs to Generate Fine-grained Citations in Long-context QA. See the comparison table for live GitHub stats and shared categories.
- When should I choose FastChat over LongCite?
- Choose FastChat over LongCite when Tags unique to FastChat: chatbots, distributed serving, evaluation system, large-language-models; Also covers Inference & Serving, Model Training; - You are looking to train and evaluate state-of-the-art models such as Vicuna or MT-Bench.
- When should I choose LongCite over FastChat?
- Choose LongCite over FastChat when Tags unique to LongCite: benchmark, citation-generation, fine-tuning, llm; Leaner open-issue backlog (9).
- When should I avoid FastChat?
- - You require a proprietary or closed-source framework; FastChat is open-source under Apache-2.0 license and its use might be unsuitable for environments requiring proprietary solutions. - Your chatbot evaluation needs do not align with the types of data used in FastChat's datasets (e.g., human votes, MT-Bench evaluations). - You prefer a more user-friendly setup without the need to clone a repository and manually install dependencies; FastChat requires installation from source with additional steps for Rust and CMake on + Mac.
- When should I avoid LongCite?
- Last GitHub push was 558 days ago (dormant maintenance, Dec 31, 2024). Validate activity before betting a new project on LongCite. Evaluation & Observability: Defer heavyweight eval infra only until you have real traffic - never skip it once users depend on answers. LLM Frameworks: Avoid a framework for a single prompt-and-retrieve call; the abstraction can cost more than it saves.
- Is FastChat or LongCite more popular on GitHub?
- FastChat has more GitHub stars (39,490 vs 520). Stars measure visibility, not whether either tool fits your constraints.
- Are FastChat and LongCite open source?
- Yes - both are open-source projects on GitHub (FastChat: Apache-2.0, LongCite: Apache-2.0).
- Where can I find alternatives to FastChat or LongCite?
- GraphCanon lists graph-backed alternatives at FastChat alternatives and LongCite alternatives (FastChat markdown twin, LongCite markdown twin), ranked by typed relationship edges rather than popularity votes.
- Is there a machine-readable version of this comparison?
- Yes. The markdown twin at this comparison mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers.
- Which is better maintained, FastChat or LongCite?
- FastChat: Steady. LongCite: Dormant. Compare maintenance labels, days since push, and release cadence in the trust section below - stars alone do not measure maintenance.
- Where are the full trust reports for FastChat and LongCite?
- GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: FastChat trust report; LongCite trust report.