DiffusionGemma
DiffusionGemma is an experimental open-weight text diffusion model built on the Gemma 4 26B A4B backbone. An autoregressive encoder caches context while a bidirectional decoder repeatedly denoises 256-token canvases, producing blocks of text in parallel. It accepts text and visual input and supports thinking and tools. It targets fast small-batch generation on a capable accelerator, trading some task accuracy for throughput relative to autoregressive Gemma 4.
2026-06-10
25.2B total / 3.8B active
Sparse MoE encoder-decoder with autoregressive prompt encoder, bidirectional diffusion decoder and 256-token generation canvases
Apache-2.0
Specifications
- Parameters
- 25.2B total / 3.8B active
- Architecture
- Sparse MoE encoder-decoder with autoregressive prompt encoder, bidirectional diffusion decoder and 256-token generation canvases
- License
- Apache-2.0
- Context Window
- 262,144 tokens
- Type
- multimodal
- Modalities
- textimagevideo
Benchmark Scores
Advanced Specifications
- Model Family
- Gemma
- API Access
- Not Available
- Chat Interface
- Not Available
- Multilingual Support
- Yes
- Variants
- diffusiongemma-26B-A4B-it
- Hardware Support
- GPUTPUCPU
Capabilities & Limitations
- Capabilities
- block text diffusionreasoningcodevisionfunction calling
- Known Limitations
- Reported speed gains depend on accelerator and batch size; high concurrency can remove the advantage.Task quality is lower than its autoregressive counterpart on several evaluations.Experimental runtime and sampling requirements differ from ordinary autoregressive models.
- Notable Use Cases
- local low-latency generationdiffusion-model researchsmall-batch assistants
- Function Calling Support
- Yes
- Tool Use Support
- Yes