Home/Compare/FastChat vs prompt-patterns

Comparison

FastChat vs prompt-patterns

Verdict

Pick FastChat when tags unique to FastChat: chatbot arena, llm-evaluation, multi-model serving, openai-compatible apis; pick prompt-patterns when requirements: The repository does not specify system requirements.; Details about compatible AI models, frameworks, and the expected environment setup remain unspecified in the provided information..

Markdown twin · FastChat alternatives · prompt-patterns alternatives

GraphCanon updated Sep 20, 2026

8views this month

FastChat logo

FastChat

lm-sys/FastChat

★ 40kpushed May 1, 2026
vs
prompt-patterns logo

prompt-patterns

phodal/prompt-patterns

★ 3.1kpushed Mar 22, 2023

Trust & integrity

SignalFastChatprompt-patterns
Maintenance
Slowing (140d since push)
As of Sep 18, 2026 · github_public_v1
Dormant (1278d since push)
As of Sep 20, 2026 · github_public_v1
Provenance
Not a fork · Organization account
As of Sep 18, 2026 · github_public_v1
Not a fork · Personal account
As of Sep 20, 2026 · github_public_v1
OSV dependency advisories
No lockfile (source not queried)
As of Sep 18, 2026 · osv@v1
No lockfile (source not queried)
As of Jul 11, 2026 · osv@v1
deps.dev advisories
Not queried
deps.dev@v1
Not queried
deps.dev@v1
OpenSSF Scorecard
Not queried
openssf-scorecard@v1
Not queried
openssf-scorecard@v1

Tagline

FastChat
An open platform for training, serving, and evaluating large language models
prompt-patterns
Prompt 编写模式:如何将思维框架赋予机器,以设计模式的形式来思考 prompt

Stars

FastChat
40k
prompt-patterns
3.1k

Forks

FastChat
4.8k
prompt-patterns
198

Open issues

FastChat
1.0k
prompt-patterns
0

Language

FastChat
Python
prompt-patterns
-

Adopt for

FastChat
FastChat is an open-source platform for training, serving, and evaluating large language models, including Vicuna, and supports Chatbot Arena, a platform for LLM evaluations with human feedback.
prompt-patterns
-

Persona

FastChat
-
prompt-patterns
-

Runtime

FastChat
-
prompt-patterns
-

License

FastChat
Apache-2.0
prompt-patterns
-

Last pushed

FastChat
May 1, 2026
prompt-patterns
Mar 22, 2023

Categories

FastChat
Evaluation & Observability, Inference & Serving, LLM Frameworks, Model Training
prompt-patterns
Evaluation & Observability, LLM Frameworks

Trust and health

Maintenance

FastChat
Slowing (36%)
prompt-patterns
Dormant (18%)

Days since push

FastChat
140d
prompt-patterns
1278d

Open issues (now)

FastChat
1.0k
prompt-patterns
0

Stars delta

FastChat
+19 (30d)
prompt-patterns
-4 (30d)

Open issues delta

FastChat
+5 (30d)
prompt-patterns
0 (30d)

Owner type

FastChat
Organization
prompt-patterns
User

Full report

FastChat
Trust report
prompt-patterns
Trust report

Shared compatibility

  • ChatGPT · FastChat: Works with ChatGPT · prompt-patterns: Works with ChatGPT

Choose FastChat if…

  • Tags unique to FastChat: chatbot arena, llm-evaluation, multi-model serving, openai-compatible apis.
  • Also covers Inference & Serving, Model Training.
  • When you need a platform that supports both training and evaluation of large language models, such as Vicuna, and you want to leverage human feedback for model evaluation.

When NOT to use FastChat

  • If you are looking for a platform that focuses solely on model training without serving or evaluation capabilities, FastChat offers a comprehensive suite that might be more than you need.
  • If your project does not require human feedback for model evaluation, FastChat's integration with Chatbot Arena might be an unnecessary feature.
  • If you are working with proprietary or closed-source models, FastChat's open-source nature and reliance on open-source models like Vicuna might not align with your project requirements.

Choose prompt-patterns if…

  • Requirements: The repository does not specify system requirements.; Details about compatible AI models, frameworks, and the expected environment setup remain unspecified in the provided information..
  • Tags unique to prompt-patterns: chatgpt, github-copilot, prompt-engineering, stable-diffusion.
  • Use prompt-patterns for designing structured prompts to guide AI thinking in specific frameworks when working on projects that require maintaining a clear cognitive structure.

When NOT to use prompt-patterns

  • Avoid prompt-patterns for real-time applications or situations requiring dynamic, contextually adaptive prompts, as it might lack flexibility compared to more generalized frameworks.
  • Do not use if your project's requirements revolve around innovative and unstructured AI interactions; this tool is best for structured environments.

Explore

Sources

Every stat on this page traces to a dated GitHub sync, license file, enrichment field, or trust scan.

GitHub stars on cards: FastChat 40k · prompt-patterns 3.1k (synced Sep 20, 2026).

Common questions

What is the difference between FastChat and prompt-patterns?
FastChat: An open platform for training, serving, and evaluating large language models. prompt-patterns: Prompt 编写模式:如何将思维框架赋予机器,以设计模式的形式来思考 prompt. See the comparison table for live GitHub stats and shared categories.
When should I choose FastChat over prompt-patterns?
Choose FastChat over prompt-patterns when Tags unique to FastChat: chatbot arena, llm-evaluation, multi-model serving, openai-compatible apis; Also covers Inference & Serving, Model Training; When you need a platform that supports both training and evaluation of large language models, such as Vicuna, and you want to leverage human feedback for model evaluation.
When should I choose prompt-patterns over FastChat?
Choose prompt-patterns over FastChat when Requirements: The repository does not specify system requirements.; Details about compatible AI models, frameworks, and the expected environment setup remain unspecified in the provided information.; Tags unique to prompt-patterns: chatgpt, github-copilot, prompt-engineering, stable-diffusion; Use prompt-patterns for designing structured prompts to guide AI thinking in specific frameworks when working on projects that require maintaining a clear cognitive structure.
When should I avoid FastChat?
If you are looking for a platform that focuses solely on model training without serving or evaluation capabilities, FastChat offers a comprehensive suite that might be more than you need. If your project does not require human feedback for model evaluation, FastChat's integration with Chatbot Arena might be an unnecessary feature. If you are working with proprietary or closed-source models, FastChat's open-source nature and reliance on open-source models like Vicuna might not align with your project requirements.
When should I avoid prompt-patterns?
Avoid prompt-patterns for real-time applications or situations requiring dynamic, contextually adaptive prompts, as it might lack flexibility compared to more generalized frameworks. Do not use if your project's requirements revolve around innovative and unstructured AI interactions; this tool is best for structured environments.
Is FastChat or prompt-patterns more popular on GitHub?
FastChat has more GitHub stars (39,536 vs 3,091). Stars measure visibility, not whether either tool fits your constraints.
Are FastChat and prompt-patterns open source?
Yes - both are open-source projects on GitHub.
Where can I find alternatives to FastChat or prompt-patterns?
GraphCanon lists graph-backed alternatives at FastChat alternatives and prompt-patterns alternatives (FastChat markdown twin, prompt-patterns 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 prompt-patterns?
FastChat: Slowing. prompt-patterns: 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 prompt-patterns?
GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: FastChat trust report; prompt-patterns trust report.

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