See our collection for all Gemma 3 sizes and variants.

Run Gemma 3 with Keras 3: JAX, PyTorch, or TensorFlow

zeromodels/gemma-3-1b-it

Pure-Keras 3 conversion of google/gemma-3-1b-it for zeromodels. One implementation runs unmodified on TensorFlow / Torch / JAX. This is the instruction-tuned checkpoint, served here as text -> text via Gemma3TextGenerate; weights are stored in bfloat16.

For model details, license, and usage terms, see Google's model card.

✨ Quick start

import os
os.environ["KERAS_BACKEND"] = "torch"  # or "jax" / "tensorflow"

from zeromodels.models.gemma3 import Gemma3TextGenerate, Gemma3Tokenizer

model = Gemma3TextGenerate.from_weights("zeromodels/gemma-3-1b-it")
tokenizer = Gemma3Tokenizer.from_weights("zeromodels/gemma-3-1b-it")

inputs = tokenizer([{"role": "user", "content": "Hello, who are you?"}])
outputs = model.generate(**inputs, max_new_tokens=64)
print(tokenizer.decode(outputs[0]))

Load any Gemma 3 variant the same way with from_weights("zeromodels/<variant>"):

Variant	Hub
`gemma-3-12b-it`	zeromodels/gemma-3-12b-it
`gemma-3-12b-pt`	zeromodels/gemma-3-12b-pt
`gemma-3-1b-it`	zeromodels/gemma-3-1b-it
`gemma-3-1b-pt`	zeromodels/gemma-3-1b-pt
`gemma-3-270m`	zeromodels/gemma-3-270m
`gemma-3-270m-it`	zeromodels/gemma-3-270m-it
`gemma-3-27b-it`	zeromodels/gemma-3-27b-it
`gemma-3-27b-pt`	zeromodels/gemma-3-27b-pt
`gemma-3-4b-it`	zeromodels/gemma-3-4b-it
`gemma-3-4b-pt`	zeromodels/gemma-3-4b-pt

Tips

Set KERAS_BACKEND before importing Keras / zeromodels.
Loads in bfloat16 by default. Pass load_dtype="float32" for full precision, or quantization="int8" to shrink further.
See the Gemma 3 docs.
Community / upstream weights still work via the hf: prefix: Gemma3TextGenerate.from_weights("hf:google/gemma-3-1b-it").

Special Thanks

A huge thank you to the Google Gemma authors for creating and releasing these models.

License: Gemma (gated). Accept the license on the upstream Hub card before downloading.