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karaiman/
siglip2-base-coreml

Name: siglip2-base-coreml
Availability: InStock

coreml

siglip2

image-text-retrieval

google/siglip2-base-patch16-256

finetune

apache-2.0

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SigLIP 2 B/16-256 — Core ML

Core ML conversion of google/siglip2-base-patch16-256, split into separate image and text encoders for on-device text→image retrieval. Built for CuttyLA's footage search; usable by anything that wants SigLIP 2 on Apple silicon.

Files

File	Contents
`ImageEncoder.mlpackage.zip`	Vision tower, 256×256 input, 8-bit palettized (per-grouped-channel)
`TextEncoder.mlpackage.zip`	Text tower, 64-token input, 8-bit palettized
`tokenizer.zip`	Gemma SentencePiece tokenizer files (`tokenizer.json`, config)
`manifest.json`	File names, sha256s, sizes, model dims

Both encoders emit L2-normalized 768-d embeddings (embedding output); similarity is a plain dot product. Minimum deployment target: macOS 15.

Usage notes

Image preprocessing is a squash-resize to 256×256 (no center crop), pixels scaled to [-1, 1]. The ImageType input already applies the scaling.
Text must be tokenized with the bundled Gemma tokenizer and padded to 64 with the pad token (0), no attention mask — SigLIP was trained that way and embeddings drift if padding differs.
Conversion is parity-gated: every release's embeddings match the PyTorch reference at cosine ≥ 0.99 on a fixture set. Conversion source: the models/siglip2 directory of the CuttyLA repository.

Versioning

Files in this repo are immutable once published. Re-conversions are published as new versions, never overwrites.

License

Apache 2.0, same as the original weights by Google. This repository redistributes a converted form of those weights without modification to their values beyond 8-bit palettization. The conversion is published by karaiman.team; the weights themselves are Google's work, not ours.

karaiman/siglip2-base-coreml