--- title: "stt vs FastChat" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/jianchang512-stt-vs-lm-sys-fastchat" tools: ["jianchang512-stt", "lm-sys-fastchat"] --- # stt vs FastChat *GraphCanon updated Jul 11, 2026* ## Verdict Pick stt when license: stt is GPL-3.0, FastChat is Apache-2.0; pick FastChat when license: FastChat is Apache-2.0, stt is GPL-3.0. [stt](https://pyvideotrans.com) reports 4.7k GitHub stars, 494 forks, and 100 open issues, last pushed Jan 22, 2026. [FastChat](https://github.com/lm-sys/FastChat) has 39k stars, 4.8k forks, and 1.0k open issues, last pushed May 1, 2026. Figures are from public GitHub metadata via [stt's repository](https://github.com/jianchang512/stt) and [FastChat's repository](https://github.com/lm-sys/FastChat). | | [stt](/tools/jianchang512-stt.md) | [FastChat](/tools/lm-sys-fastchat.md) | | --- | --- | --- | | Tagline | Voice Recognition to Text Tool / 一个离线运行的本地音视频转字幕工具，输出json、srt字幕、纯文字格式 | An open platform for training, serving, and evaluating large language models | | Stars | 4,664 | 39,490 | | Forks | 494 | 4,788 | | Open issues | 100 | 1,027 | | Language | Python | Python | | Adopt for | - | 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 | | Persona | - | - | | Runtime | - | - | | License | GPL-3.0 | Apache-2.0 | | Categories | Inference & Serving, Model Training, Speech & Audio | Evaluation & Observability, Inference & Serving, LLM Frameworks, Model Training | ## Trust and health _Sourced signals - not a safety guarantee. No winner column._ | | [stt](/tools/jianchang512-stt.md) | [FastChat](/tools/lm-sys-fastchat.md) | | --- | --- | --- | | Maintenance | Slowing (36%) | Steady (60%) | | Days since push | 170d | 71d | | Open issues (now) | 100 | 1.0k | | Owner type | User | Organization | | Security scan | 1 critical, 2 high, 3 medium, 21 low (1 critical, 2 high, 3 medium, 21 low) | No lockfile | | Full report | [trust report](/tools/jianchang512-stt/trust.md) | [trust report](/tools/lm-sys-fastchat/trust.md) | ## Shared compatibility - **Python**: [stt](/tools/jianchang512-stt.md) - Python runtime; [FastChat](/tools/lm-sys-fastchat.md) - Python runtime ## Decision facts: FastChat - **Adopt for:** 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 ## Choose when ### Choose stt if… - License: stt is GPL-3.0, FastChat is Apache-2.0. - Tags unique to stt: python, speech, speech-recognition, speech-to-text. - Also covers Speech & Audio. ### Choose FastChat if… - License: FastChat is Apache-2.0, stt is GPL-3.0. - Tags unique to FastChat: chatbots, distributed serving, evaluation system, large-language-models. - Also covers Evaluation & Observability, LLM Frameworks. - - You are looking to train and evaluate state-of-the-art models such as Vicuna or MT-Bench. ## When NOT to use stt - Last GitHub push was 171 days ago (slowing maintenance, Jan 22, 2026). Validate activity before betting a new project on stt. - Inference & Serving: Self-hosting rarely beats a hosted API on cost until you have steady, high-volume traffic. - Model Training: Try prompting and RAG first; fine-tuning is the answer to style/format, not missing knowledge. ## 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. ## Common questions ### What is the difference between stt and FastChat? stt: Voice Recognition to Text Tool / 一个离线运行的本地音视频转字幕工具，输出json、srt字幕、纯文字格式. FastChat: An open platform for training, serving, and evaluating large language models. See the comparison table for live GitHub stats and shared categories. ### When should I choose stt over FastChat? Choose stt over FastChat when License: stt is GPL-3.0, FastChat is Apache-2.0; Tags unique to stt: python, speech, speech-recognition, speech-to-text; Also covers Speech & Audio. ### When should I choose FastChat over stt? Choose FastChat over stt when License: FastChat is Apache-2.0, stt is GPL-3.0; Tags unique to FastChat: chatbots, distributed serving, evaluation system, large-language-models; Also covers Evaluation & Observability, LLM Frameworks; - You are looking to train and evaluate state-of-the-art models such as Vicuna or MT-Bench. ### When should I avoid stt? Last GitHub push was 171 days ago (slowing maintenance, Jan 22, 2026). Validate activity before betting a new project on stt. Inference & Serving: Self-hosting rarely beats a hosted API on cost until you have steady, high-volume traffic. Model Training: Try prompting and RAG first; fine-tuning is the answer to style/format, not missing knowledge. ### 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. ### Is stt or FastChat more popular on GitHub? FastChat has more GitHub stars (39,490 vs 4,664). Stars measure visibility, not whether either tool fits your constraints. ### Are stt and FastChat open source? Yes - both are open-source projects on GitHub (stt: GPL-3.0, FastChat: Apache-2.0). ### Where can I find alternatives to stt or FastChat? GraphCanon lists graph-backed alternatives at [stt alternatives](/tools/jianchang512-stt/alternatives) and [FastChat alternatives](/tools/lm-sys-fastchat/alternatives) ([stt markdown twin](/tools/jianchang512-stt/alternatives.md), [FastChat markdown twin](/tools/lm-sys-fastchat/alternatives.md)), 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](/compare/jianchang512-stt-vs-lm-sys-fastchat.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, stt or FastChat? stt: Slowing. FastChat: Steady. 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 stt and FastChat? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [stt trust report](/tools/jianchang512-stt/trust); [FastChat trust report](/tools/lm-sys-fastchat/trust). --- **Machine-readable endpoints** - JSON: [`/api/graphcanon/graph?tool=jianchang512-stt`](/api/graphcanon/graph?tool=jianchang512-stt) - LLM index: [/llms.txt](/llms.txt) - Full corpus: [/llms-full.txt](/llms-full.txt) _GraphCanon - The knowledge graph for AI development. https://www.graphcanon.com/_