--- title: "dia vs openai_tts" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/nari-labs-dia-vs-sfortis-openai-tts" tools: ["nari-labs-dia", "sfortis-openai-tts"] --- # dia vs openai_tts *GraphCanon updated Sep 20, 2026* ## Verdict Pick dia if dia is an open-weight text-to-dialogue model providing full control over scripts and voices, ideal for generating ultra-realistic dialogue; pick openai_tts if a Python-based Home Assistant TTS component that leverages the OpenAI speech engine with extras like chimes and normalization. [dia](https://github.com/nari-labs/dia) reports 19k GitHub stars, 1.7k forks, and 91 open issues, last pushed Nov 19, 2025. [openai_tts](https://github.com/sfortis/openai_tts) has 216 stars, 53 forks, and 12 open issues, last pushed Sep 19, 2026. Figures are from public GitHub metadata via [dia's repository](https://github.com/nari-labs/dia) and [openai_tts's repository](https://github.com/sfortis/openai_tts). | | [dia](/tools/nari-labs-dia.md) | [openai_tts](/tools/sfortis-openai-tts.md) | | --- | --- | --- | | Tagline | A TTS model for generating ultra-realistic dialogue | Custom TTS component for Home Assistant with OpenAI speech engine integration | | Stars | 19,400 | 216 | | Forks | 1,689 | 53 | | Open issues | 91 | 12 | | Language | Python | Python | | Adopt for | Dia is an open-weight text-to-dialogue model providing full control over scripts and voices, ideal for generating ultra-realistic dialogue. | A Python-based Home Assistant TTS component that leverages the OpenAI speech engine with extras like chimes and normalization | | Persona | - | - | | Runtime | - | - | | License | Apache-2.0 | GPL-3.0 | | Categories | Speech & Audio | Speech & Audio | ## Trust and health _Sourced signals - not a safety guarantee. No winner column._ | | [dia](/tools/nari-labs-dia.md) | [openai_tts](/tools/sfortis-openai-tts.md) | | --- | --- | --- | | Maintenance | Slowing (36%) | Very active (96%) | | Days since push | 304d | 0d | | Open issues (now) | 91 | 12 | | Stars delta | +39 (30d) | +11 (30d) | | Open issues delta | 0 (30d) | +3 (30d) | | Owner type | Organization | User | | Full report | [trust report](/tools/nari-labs-dia/trust.md) | [trust report](/tools/sfortis-openai-tts/trust.md) | ## Decision facts: dia - **Adopt for:** Dia is an open-weight text-to-dialogue model providing full control over scripts and voices, ideal for generating ultra-realistic dialogue. ## Decision facts: openai_tts - **Adopt for:** A Python-based Home Assistant TTS component that leverages the OpenAI speech engine with extras like chimes and normalization ## Choose when ### Choose dia if… - License: dia is Apache-2.0, openai_tts is GPL-3.0. - Tags unique to dia: dialogue-generation, text-to-speech, tts. - When you require precise control over voice and script in the creation of highly realistic dialogues ### Choose openai_tts if… - License: openai_tts is GPL-3.0, dia is Apache-2.0. - Tags unique to openai_tts: ai, chime, ha, hacs. - When you require integration with the Home Assistant ecosystem that includes high-quality text-to-speech from OpenAI ## When NOT to use dia - If your setup lacks a GPU, as Dia has not yet added CPU support - In scenarios where immediate real-time performance is critical since the first run could be longer due to additional codec downloads ## When NOT to use openai_tts - Avoid if your deployment environment does not support Python, essential for this TTS component's operation - Not fit when looking for pre-built integrations without Home Assistant, since it specifically caters to the Home Assistant platform ## Common questions ### What is the difference between dia and openai_tts? dia: A TTS model for generating ultra-realistic dialogue. openai_tts: Custom TTS component for Home Assistant with OpenAI speech engine integration. See the comparison table for live GitHub stats and shared categories. ### When should I choose dia over openai_tts? Choose dia over openai_tts when License: dia is Apache-2.0, openai_tts is GPL-3.0; Tags unique to dia: dialogue-generation, text-to-speech, tts; When you require precise control over voice and script in the creation of highly realistic dialogues. ### When should I choose openai_tts over dia? Choose openai_tts over dia when License: openai_tts is GPL-3.0, dia is Apache-2.0; Tags unique to openai_tts: ai, chime, ha, hacs; When you require integration with the Home Assistant ecosystem that includes high-quality text-to-speech from OpenAI. ### When should I avoid dia? If your setup lacks a GPU, as Dia has not yet added CPU support In scenarios where immediate real-time performance is critical since the first run could be longer due to additional codec downloads ### When should I avoid openai_tts? Avoid if your deployment environment does not support Python, essential for this TTS component's operation Not fit when looking for pre-built integrations without Home Assistant, since it specifically caters to the Home Assistant platform ### Is dia or openai_tts more popular on GitHub? dia has more GitHub stars (19,400 vs 216). Stars measure visibility, not whether either tool fits your constraints. ### Are dia and openai_tts open source? Yes - both are open-source projects on GitHub (dia: Apache-2.0, openai_tts: GPL-3.0). ### Where can I find alternatives to dia or openai_tts? GraphCanon lists graph-backed alternatives at [dia alternatives](/tools/nari-labs-dia/alternatives) and [openai_tts alternatives](/tools/sfortis-openai-tts/alternatives) ([dia markdown twin](/tools/nari-labs-dia/alternatives.md), [openai_tts markdown twin](/tools/sfortis-openai-tts/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/nari-labs-dia-vs-sfortis-openai-tts.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, dia or openai_tts? dia: Slowing. openai_tts: Very active. 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 dia and openai_tts? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [dia trust report](/tools/nari-labs-dia/trust); [openai_tts trust report](/tools/sfortis-openai-tts/trust). --- **Machine-readable endpoints** - JSON: [`/api/graphcanon/graph?tool=nari-labs-dia`](/api/graphcanon/graph?tool=nari-labs-dia) - 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/_