Home / GitHub - deepseek-ai/DeepSpec: DeepSpec: a full-stack codebase for training and evaluating speculative decoding algorithms vs GitHub - JustVugg/colibri: Run GLM-5.2 (744B MoE) on a 25GB-RAM consumer machine — pure C, zero deps, experts streamed from disk. Tiny engine, immense model. 🐦

GitHub - deepseek-ai/DeepSpec: DeepSpec: a full-stack codebase for training and evaluating speculative decoding algorithms vs GitHub - JustVugg/colibri: Run GLM-5.2 (744B MoE) on a 25GB-RAM consumer machine — pure C, zero deps, experts streamed from disk. Tiny engine, immense model. 🐦

GitHub - deepseek-ai/DeepSpec: DeepSpec: a full-stack codebase for training and evaluating speculative decoding algorithms vs GitHub - JustVugg/colibri: Run GLM-5.2 (744B MoE) on a 25GB-RAM consumer machine — pure C, zero deps, experts streamed from disk. Tiny engine, immense model. 🐦: GitHub - JustVugg/colibri: Run GLM-5.2 (744B MoE) on a 25GB-RAM consumer machine — pure C, zero deps, experts streamed from disk. Tiny engine, immense model. 🐦 scores higher in our editorial review for artificial intelligence. GitHub - deepseek-ai/DeepSpec: DeepSpec: a full-stack codebase for training and evaluating speculative decoding algorithms is best for ai researchers and ml engineers working on efficient language model inference, while GitHub - JustVugg/colibri: Run GLM-5.2 (744B MoE) on a 25GB-RAM consumer machine — pure C, zero deps, experts streamed from disk. Tiny engine, immense model. 🐦 suits developers and researchers needing to run massive models on limited hardware. Below is the full side-by-side on features, pricing and who each fits.

Quick answer

Winner: GitHub - JustVugg/colibri: Run GLM-5.2 (744B MoE) on a 25GB-RAM consumer machine — pure C, zero deps, experts streamed from disk. Tiny engine, immense model. 🐦 edges ahead on editorial score, but pick based on fit — see the table below.

GitHub - deepseek-ai/DeepSpec: DeepSpec: a full-stack codebase for training and evaluating speculative decoding algorithms

DeepSpec is a powerful research tool for teams serious about optimizing language model inference through speculative decoding, though its hardware demands make it best suited for well-resourced organizations.

Pick it if: Its comprehensive, production-ready implementation of the entire speculative decoding pipeline sets it apart from research prototypes.

VS
GitHub - JustVugg/colibri: Run GLM-5.2 (744B MoE) on a 25GB-RAM consumer machine — pure C, zero deps, experts streamed from disk. Tiny engine, immense model. 🐦

Colibri is an impressive technical achievement that makes massive MoE models accessible on consumer hardware, though with some trade-offs in exact output consistency.

Pick it if: The only solution that can run 744B parameter models on consumer-grade hardware with pure C.

GitHub - deepseek-ai/DeepSpec: DeepSpec: a full-stack codebase for training and evaluating speculative decoding algorithmsGitHub - JustVugg/colibri: Run GLM-5.2 (744B MoE) on a 25GB-RAM consumer machine — pure C, zero deps, experts streamed from disk. Tiny engine, immense model. 🐦
CategoryArtificial IntelligenceArtificial Intelligence
Score4.0/54.5/5
Pricingopen-sourceopen-source
Public API✕ No✕ No
Free tier✓ Yes✓ Yes
Self-host✓ Yes✓ Yes
PlatformsLinuxLinux, macOS, Windows
Best forAI researchers and ML engineers working on efficient language model inferenceDevelopers and researchers needing to run massive models on limited hardware
Not ideal forCasual users or those without access to high-performance computing resources.Those needing byte-exact reproducibility or who don't have sufficient disk space for the expert files.

GitHub - deepseek-ai/DeepSpec: DeepSpec: a full-stack codebase for training and evaluating speculative decoding algorithms

Pros
  • Complete implementation from data prep to evaluation
  • Supports popular models like Qwen3-4B
  • Detailed documentation for each workflow stage
  • Optimized for multi-GPU training
Cons
  • Requires significant storage for target caches
  • Assumes access to high-end GPU hardware
  • Steep learning curve for ML beginners
Full GitHub - deepseek-ai/DeepSpec: DeepSpec: a full-stack codebase for training and evaluating speculative decoding algorithms review →

GitHub - JustVugg/colibri: Run GLM-5.2 (744B MoE) on a 25GB-RAM consumer machine — pure C, zero deps, experts streamed from disk. Tiny engine, immense model. 🐦

Pros
  • Extremely efficient memory usage for large models
  • No dependencies - simple deployment
  • Validated against transformers for accuracy
Cons
  • Not byte-identical to non-speculative greedy in practice
  • Requires significant disk space (~370GB for experts)
Full GitHub - JustVugg/colibri: Run GLM-5.2 (744B MoE) on a 25GB-RAM consumer machine — pure C, zero deps, experts streamed from disk. Tiny engine, immense model. 🐦 review →

Frequently asked questions

Is GitHub - deepseek-ai/DeepSpec: DeepSpec: a full-stack codebase for training and evaluating speculative decoding algorithms better than GitHub - JustVugg/colibri: Run GLM-5.2 (744B MoE) on a 25GB-RAM consumer machine — pure C, zero deps, experts streamed from disk. Tiny engine, immense model. 🐦?

Its comprehensive, production-ready implementation of the entire speculative decoding pipeline sets it apart from research prototypes.. GitHub - JustVugg/colibri: Run GLM-5.2 (744B MoE) on a 25GB-RAM consumer machine — pure C, zero deps, experts streamed from disk. Tiny engine, immense model. 🐦: Th

What's the main difference between GitHub - deepseek-ai/DeepSpec: DeepSpec: a full-stack codebase for training and evaluating speculative decoding algorithms and GitHub - JustVugg/colibri: Run GLM-5.2 (744B MoE) on a 25GB-RAM consumer machine — pure C, zero deps, experts streamed from disk. Tiny engine, immense model. 🐦?

GitHub - deepseek-ai/DeepSpec: DeepSpec: a full-stack codebase for training and evaluating speculative decoding algorithms is a artificial intelligence tool best for ai researchers and ml engineers working on efficient language model inference. GitHub - JustVugg/colibri: Run GLM-5.2 (744B MoE) on a

Which is cheaper, GitHub - deepseek-ai/DeepSpec: DeepSpec: a full-stack codebase for training and evaluating speculative decoding algorithms or GitHub - JustVugg/colibri: Run GLM-5.2 (744B MoE) on a 25GB-RAM consumer machine — pure C, zero deps, experts streamed from disk. Tiny engine, immense model. 🐦?

GitHub - deepseek-ai/DeepSpec: DeepSpec: a full-stack codebase for training and evaluating speculative decoding algorithms: open-source. GitHub - JustVugg/colibri: Run GLM-5.2 (744B MoE) on a 25GB-RAM consumer machine — pure C, zero deps, experts streamed from disk. Tiny engine, immense model. 🐦: o

Can I self-host GitHub - deepseek-ai/DeepSpec: DeepSpec: a full-stack codebase for training and evaluating speculative decoding algorithms or GitHub - JustVugg/colibri: Run GLM-5.2 (744B MoE) on a 25GB-RAM consumer machine — pure C, zero deps, experts streamed from disk. Tiny engine, immense model. 🐦?

GitHub - deepseek-ai/DeepSpec: DeepSpec: a full-stack codebase for training and evaluating speculative decoding algorithms: yes, self-hosting is supported. GitHub - JustVugg/colibri: Run GLM-5.2 (744B MoE) on a 25GB-RAM consumer machine — pure C, zero deps, experts streamed from disk. Tiny engine, immense model. 🐦: yes, self-hosting is supported.