Apple A19 Pro (iPhone 17 Pro On-Device AI Flagship)
Overview
Apple A19 Pro is Apple's flagship smartphone SoC for the iPhone 17 Pro / Pro Max, released 2025-09-09, codename Thera. Built on TSMC 3rd-gen 3nm (N3P), it features a 6-core CPU (2P @ 4.26 GHz + 4E @ 2.6 GHz), 6-core GPU (each core with integrated Neural Accelerators), 16-core Neural Engine (4× peak compute vs A18 Pro), and 12 GB LPDDR5X unified memory. Paired with Apple's laser-welded vapor chamber cooling, sustained CPU+GPU performance is up 40% over the A18 Pro. The iPhone 17 Pro maintains 30+ tok/s inference when running large models continuously (e.g., Apple Intelligence on-device 3B LLM), making it Apple's most power-efficient iPhone AI chip ever.
Core Specifications
| Item | Parameter |
|---|
| Architecture | Apple A-Series (iPhone mobile SoC) |
| Process | TSMC 3rd-gen 3nm (N3P) |
| Transistors | ~19 billion (estimated) |
| CPU Cores | 6 (2P @ 4.26 GHz + 4E @ 2.6 GHz) |
| L1/L2/L3 Cache | 1.4 MB L1 / 22 MB L2 / 32 MB SLC |
| GPU Cores | 6 (iPhone Air uses 5-core variant) |
| GPU Clock | 1620 MHz |
| GPU New Features | Per-core Neural Accelerators (4× A18 Pro peak compute), hardware ray tracing, Dynamic Caching 2.0 |
| Neural Engine | 16-core, improved memory bandwidth |
| Neural Engine Compute | ~35 TOPS INT8 (estimated; A18 Pro 35 TOPS, claimed 4× from Neural Accel) |
| Unified Memory | 12 GB LPDDR5X (iPhone Air also 12 GB) |
| Media Engine | Hardware H.264/HEVC/ProRes/ProRes RAW/AV1 decode, hardware ray tracing |
| Interface | USB 3.2 Gen 2 (10 Gbps) |
| Cooling | Apple laser-welded vapor chamber (unibody aluminum) |
| TDP | ~8-10 W (iPhone sustained load) |
| Launch Devices | iPhone 17 Pro / Pro Max (6-core GPU), iPhone Air (5-core GPU) |
| Launch Date | 2025-09-09 |
| iPhone 17 Pro 256GB | $1,099 |
Comparison with A18 Pro
| Metric | A19 Pro | A18 Pro | Improvement |
|---|
| Process | 3nm N3P | 3nm N3 | 3rd-gen 3nm, better yield |
| CPU Cores | 6 (2P+4E) | 6 (2P+4E) | Same |
| CPU Max Frequency | 4.26 GHz | 4.04 GHz | +5% |
| GPU Cores | 6 + 6 Neural Accel | 6 | +Neural Accel |
| GPU Compute (INT8) | 4× A18 Pro (from NA) | Baseline | 4× |
| Neural Engine | 16-core + bandwidth boost | 16-core | Memory bandwidth boost |
| L3 SLC | 32 MB | 16 MB | 2× |
| Sustained Performance | +40% (vapor chamber) | Baseline | Significant |
| Process Node | N3P | N3 | 3rd gen |
| Price (Pro 256GB) | $1,099 | $999 | +$100 |
| Model / Task | Quantization | Performance | Notes |
|---|
| Apple Intelligence on-device 3B LLM | Apple built-in | ~30+ tok/s | Fully NPU+GPU cooperative |
| Siri local enhancements | Apple built-in | Real-time | iOS 26 on-device |
| Image Playground image generation | Apple built-in | < 1s | On-device Diffusion |
| Visual Intelligence object recognition | Apple built-in | Real-time | Camera + LLM |
| Llama 3.1 8B (Q4_K_M) | llama.cpp | ~20 tok/s | Third-party benchmark |
| Stable Diffusion XL (CoreML) | FP16 | ~1.5 it/s | Image generation |
| Whisper Large V3 (CoreML) | FP16 | 3× real-time | Speech transcription |
Neural Accelerators Innovation: The A19 Pro is the first to integrate AI accelerators inside each GPU core, rather than relying solely on the standalone 16-core NPU. This means LLM/Diffusion inference can simultaneously leverage GPU compute units + NA matrix units + NE 16 cores — three parallel engines — delivering a theoretical peak compute of up to 4× the A18 Pro.
Use Cases
- iPhone 17 Pro / Pro Max premium mobile AI (Apple Intelligence, Siri, Visual Intelligence)
- iPhone Air (5-core GPU variant, released 2025-09, thinnest iPhone at 6.6mm)
- On-device LLM inference (Apple Foundation Models 3B, Qwen 2.5, etc.)
- Image/video generation (Image Playground, Genmoji, Procreate AI)
- Developer: Core ML + MLX framework local model deployment
- Education / Enterprise: On-device privacy AI (no cloud transmission)
| Item | Information |
|---|
| Vendor | Apple Inc. |
| Design | Apple in-house (Cupertino, CA) |
| Fab | TSMC Taiwan (3nm N3P line) |
| Software Stack | iOS 26 / iPadOS 26 / macOS 26 (Tahoe) |
| AI Framework | Core ML, MLX, Create ML, Apple Intelligence |
| Launch Price | iPhone 17 Pro 256GB $1,099 / 512GB $1,299 / 1TB $1,599 |
| Pro Max Price | 256GB $1,199 / 2TB $1,999 |
Key Features
- 3rd-gen 3nm (N3P) process, Apple's first N3P chip
- 6-core GPU + integrated Neural Accelerators (per-core matrix units)
- 16-core Neural Engine + improved memory bandwidth
- 32 MB SLC system-level cache (2× A18 Pro)
- Laser-welded vapor chamber (unibody aluminum)
- USB 3.2 Gen 2 (10 Gbps) wired transfer
- Wi-Fi 7, 5G mmWave, Thread smart home
- ProMotion 120 Hz, Always-On Display, Ceramic Shield 2 (3× scratch resistance)
- 48MP triple camera + 8× optical zoom (longest ever on Pro Max)
- 18MP Center Stage front camera + ProRes RAW + Apple Log 2 + genlock cinema-grade features