--- title: "hifi-gan vs dia" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/jik876-hifi-gan-vs-nari-labs-dia" tools: ["jik876-hifi-gan", "nari-labs-dia"] --- # hifi-gan vs dia *GraphCanon updated Jul 29, 2026* ## Verdict Pick hifi-gan if hiFi-GAN is optimized for generating high-fidelity speech efficiently and supports both training from scratch and fine-tuning with pretrained models; 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. [hifi-gan](https://github.com/jik876/hifi-gan) reports 2.4k GitHub stars, 555 forks, and 111 open issues, last pushed Jul 27, 2024. [dia](https://github.com/nari-labs/dia) has 19k stars, 1.7k forks, and 91 open issues, last pushed Nov 19, 2025. Figures are from public GitHub metadata via [hifi-gan's repository](https://github.com/jik876/hifi-gan) and [dia's repository](https://github.com/nari-labs/dia). | | [hifi-gan](/tools/jik876-hifi-gan.md) | [dia](/tools/nari-labs-dia.md) | | --- | --- | --- | | Tagline | Generative Adversarial Networks for Efficient and High Fidelity Speech Synthesis | A TTS model for generating ultra-realistic dialogue | | Stars | 2,363 | 19,361 | | Forks | 555 | 1,688 | | Open issues | 111 | 91 | | Language | Python | Python | | Adopt for | HiFi-GAN is optimized for generating high-fidelity speech efficiently and supports both training from scratch and fine-tuning with pretrained models. | Dia is an open-weight text-to-dialogue model providing full control over scripts and voices, ideal for generating ultra-realistic dialogue. | | Persona | - | - | | Runtime | - | - | | License | MIT | Apache-2.0 | | Categories | Speech & Audio | Speech & Audio | ## Trust and health _Sourced signals - not a safety guarantee. No winner column._ | | [hifi-gan](/tools/jik876-hifi-gan.md) | [dia](/tools/nari-labs-dia.md) | | --- | --- | --- | | Maintenance | Dormant (18%) | Slowing (36%) | | Days since push | 731d | 251d | | Open issues (now) | 111 | 91 | | Owner type | User | Organization | | Full report | [trust report](/tools/jik876-hifi-gan/trust.md) | [trust report](/tools/nari-labs-dia/trust.md) | ## Shared compatibility - **Python**: [hifi-gan](/tools/jik876-hifi-gan.md) - Python runtime; [dia](/tools/nari-labs-dia.md) - Python runtime ## Decision facts: hifi-gan - **Adopt for:** HiFi-GAN is optimized for generating high-fidelity speech efficiently and supports both training from scratch and fine-tuning with pretrained models. ## 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. ## Choose when ### Choose hifi-gan if… - License: hifi-gan is MIT, dia is Apache-2.0. - Tags unique to hifi-gan: deep-learning, gan, hifi-gan, pytorch. - When you require real-time generation capabilities up to 167.9 times faster than real time on a single V100 GPU, or even 13.4 times faster on CPU than real time for the small footprint version ### Choose dia if… - License: dia is Apache-2.0, hifi-gan is MIT. - Tags unique to dia: dialogue-generation. - When you require precise control over voice and script in the creation of highly realistic dialogues ## When NOT to use hifi-gan - If your application prioritizes sample quality above speed, despite the competitive position of HiFi-GAN in both criteria - When the computational resources for running models on a V100 GPU or leveraging the small footprint version's CPU efficiency are not available - In scenarios requiring more than just high-fidelity speech synthesis but also complex text-to-speech natural language processing capabilities ## 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 ## Common questions ### What is the difference between hifi-gan and dia? hifi-gan: Generative Adversarial Networks for Efficient and High Fidelity Speech Synthesis. dia: A TTS model for generating ultra-realistic dialogue. See the comparison table for live GitHub stats and shared categories. ### When should I choose hifi-gan over dia? Choose hifi-gan over dia when License: hifi-gan is MIT, dia is Apache-2.0; Tags unique to hifi-gan: deep-learning, gan, hifi-gan, pytorch; When you require real-time generation capabilities up to 167.9 times faster than real time on a single V100 GPU, or even 13.4 times faster on CPU than real time for the small footprint version. ### When should I choose dia over hifi-gan? Choose dia over hifi-gan when License: dia is Apache-2.0, hifi-gan is MIT; Tags unique to dia: dialogue-generation; When you require precise control over voice and script in the creation of highly realistic dialogues. ### When should I avoid hifi-gan? If your application prioritizes sample quality above speed, despite the competitive position of HiFi-GAN in both criteria When the computational resources for running models on a V100 GPU or leveraging the small footprint version's CPU efficiency are not available In scenarios requiring more than just high-fidelity speech synthesis but also complex text-to-speech natural language processing capabilities ### 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 ### Is hifi-gan or dia more popular on GitHub? dia has more GitHub stars (19,361 vs 2,363). Stars measure visibility, not whether either tool fits your constraints. ### Are hifi-gan and dia open source? Yes - both are open-source projects on GitHub (hifi-gan: MIT, dia: Apache-2.0). ### Where can I find alternatives to hifi-gan or dia? GraphCanon lists graph-backed alternatives at [hifi-gan alternatives](/tools/jik876-hifi-gan/alternatives) and [dia alternatives](/tools/nari-labs-dia/alternatives) ([hifi-gan markdown twin](/tools/jik876-hifi-gan/alternatives.md), [dia markdown twin](/tools/nari-labs-dia/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/jik876-hifi-gan-vs-nari-labs-dia.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, hifi-gan or dia? hifi-gan: Dormant. dia: Slowing. 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 hifi-gan and dia? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [hifi-gan trust report](/tools/jik876-hifi-gan/trust); [dia trust report](/tools/nari-labs-dia/trust). --- **Machine-readable endpoints** - JSON: [`/api/graphcanon/graph?tool=jik876-hifi-gan`](/api/graphcanon/graph?tool=jik876-hifi-gan) - 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/_