Core AI is Apple's on-device ML runtime in iOS 27 / macOS 27 and the successor to Core ML: PyTorch models are exported with Apple's coreai-torch (LLMs: coreai.llm.export) into .aimodel bundles that run on the GPU or the Neural Engine, e.g. Qwen3-8B 4-bit decodes at 94 tok/s on an M4 Max GPU, MLX 90 under the same protocol (apple-silicon-llm-bench, macOS 27 beta, 2026-06).

GLiNER2-PII — Core AI

The zoo's first NER / schema-driven information-extraction model, and its first DeBERTa-v3 (disentangled-attention) port. Zero-shot entity extraction: pass any label set at call time and the model finds those entities in the text — the flagship use is on-device PII redaction. fastino/gliner2-privacy-filter-PII-multi (Apache-2.0) on a multilingual mDeBERTa-v3 base (278M), fused into one static Core AI graph; the tokenizer, schema linearization, and span decode run in the Swift host.

Uncontested on iPhone. An on-device GLiNER2 already exists (GLiNER2Swift) but it is macOS-CPU / MLX only. This runs the GPU on iPhone (and, AOT-compiled, the ANE) — the first GLiNER on Apple Silicon's accelerators.

Use it

Three lines with CoreAIKit — InformationExtractor downloads this bundle once, then runs fully offline:

import CoreAIKitEmbeddings

let extractor = try await InformationExtractor(model: .gliner2PII)

// zero-shot: any labels you want, decided at call time
let entities = try await extractor.extract(
    from: "Contact Dr. Sarah Johnson at sarah.j@acme.com or +1-415-555-0142.",
    entities: ["person", "email", "phone number"])
// ["person": ["Sarah Johnson"], "email": ["sarah.j@acme.com"], "phone number": ["+1-415-555-0142"]]

// or redact in place
let clean = try await extractor.redact(
    "SSN 123-45-6789, card 4111 1111 1111 1111.",
    entities: ["social security number", "credit card number"])
// "SSN [SOCIAL SECURITY NUMBER], card [CREDIT CARD NUMBER]."

Runnable demo: Examples/InfoExtract ↗ — a paste-text → detect-and-redact PII app (iOS + macOS CLI).

How it works

One fused static graph runs the whole model; the host handles the text↔schema plumbing that makes it schema-agnostic.

• Fused graph — forward(input_ids[1,256], attention_mask[1,256], text_word_idx[1,96], schema_idx[1,17]) → span_scores[1,16,96,8]. Inside: mDeBERTa-v3 (disentangled attention, exported at a fixed shape so the relative-position buckets gather cleanly) → "first" sub-word pooling → SpanMarker → CountLSTM → einsum → sigmoid. MMAX=16 labels, T=96 words, span width K=8.
• Schema-agnostic — the label set is not baked in. The host linearizes the user's labels into the graph's input_ids (( [P] entities ( [E] l0 [E] l1 … ) ) [SEP_TEXT] …) and supplies the gather indices, so a single converted bundle answers any schema up to MMAX.
• Host collator — mDeBERTa SentencePiece/Unigram tokenization + GLiNER word-split + schema linearization + first-sub-word / schema-marker gather positions. Byte-identical to GLiNER2's Python collate_fn_inference.
• Host decode — per-label threshold + confidence-descending greedy NMS over character spans, byte-identical to GLiNER2 _format_spans.

Verification

Byte-gated against the reference GLiNER2 ext.extract at every tier — the Swift collator matches Python collate_fn_inference (input ids + gather indices), the fp16 Core AI graph matches the fp32 reference (span-scores cos 0.999993), and the decoded entities match exactly:

• Python — fp32 span-scores cos 1.0, decoded entities == ext.extract.
• Swift on Mac GPU — the demo PII suite decodes byte-identically; arbitrary runtime schemas (credentials, org/money/date/location) also match ext.extract exactly.
• iPhone 17 Pro (A19 Pro, AOT h18p) — same suite, GATE_RESULT: PASS. Model load ~1.8 s; extraction ~22–32 ms per text (warm).

Files

• macos/ — JIT .aimodel (fp16, ~582 MB) + tokenizer/ + extractor.json.
• ios/ — AOT-compiled h18p bundle (~823 MB; the device JIT is skipped) + tokenizer/ + extractor.json.

extractor.json carries the graph shapes and the GLiNER special-marker token ids (they live above the Unigram vocab, so the host emits them directly). The tokenizer is the mDeBERTa SentencePiece model declared as XLMRobertaTokenizer so swift-transformers routes it through its Unigram implementation.

• Base model: fastino/gliner2-privacy-filter-PII-multi (Apache-2.0), on microsoft/mdeberta-v3-base (MIT).
• Conversion + Swift-port reference: CoreAI-Model-Zoo.

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More models in this format: Core AI Model Zoo — 75 models, each with the recipe that produced it.

Want a different model on-device? Open a request — free, open weights only; the export and its measured numbers get published publicly.