LMT-60-4B-CoreAI-iOS

LMT-60-4B for Core AI on iOS

This repository contains an iOS 27 Core AI conversion of NiuTrans/LMT-60-4B, pinned at revision f3d1043332179618de226eab7dd38c7290a7dfb9.

It was exported with Apple's coreai-models toolchain at revision 917dc99f0cc23ac0905c4de26e18e5a3764703fc using the official Qwen3 4B iOS mixed 4-bit/8-bit compression recipe. The maximum context length is reduced to 2,048 tokens for live translation, lowering KV-cache pressure while retaining ample context for short speech transcript segments.

Artifact

• Model: Qwen3-based LMT-60-4B
• Platform: iOS 27 Core AI
• Weights: mixed 4-bit/8-bit palettization (qwen3_4b_mixed_4bit_8bit)
• Context: 2,048 tokens
• Tokenizer: embedded
• Asset format: architecture-neutral .aimodel

The source .aimodel is specialized by Core AI for the user's device. This keeps one downloadable artifact compatible with supported Apple Intelligence devices instead of storing a separate multi-gigabyte specialization per device architecture.

Languages

LMT-60-4B supports 60 source languages, including Croatian and Italian. It does not include Slovenian; applications should use a dedicated Slovenian fallback.

License

The source model is released under Apache-2.0. Apple's conversion/runtime source is governed by the BSD-3-Clause license in the upstream coreai-models repository.