MediaTek Dimensity 9400 (Cortex-X925 Agentic AI)
Product Overview
MediaTek Dimensity 9400 is MediaTek's 2024 mobile flagship SoC released 2024-10-09, TSMC 2nd-gen 3nm (N3E) process, 291 B transistors. 2nd-gen All Big Core design: 1x Cortex-X925 @ 3.62 GHz (ARM's largest IPC improvement ever) + 3x Cortex-X4 + 4x Cortex-A720, Arm Immortalis-G925 MC12 GPU, MediaTek 8th-gen NPU 890 (world's first to support Agentic AI Engine, on-device LoRA training, on-device video generation). LPDDR5X 10667 Mbps (world's fastest phone memory), 12 MB L3 + 10 MB SLC. First shipped in Vivo X200, OPPO Find X8, Xiaomi 15.
Core Specs
| Item | Parameter |
|---|---|
| Architecture | ARM v9.2 (2nd-gen 3nm All Big Core) |
| Process | TSMC 2nd-gen 3nm (N3E) |
| Transistors | 291 B |
| CPU Cores | 8 (All Big Core: 1+3+4 design) |
| Prime Core | 1x Cortex-X925 @ 3.62 GHz (ARM "Black Hawk", IPC +15% vs Cortex-X4) |
| Big Cores | 3x Cortex-X4 @ 3.25 GHz |
| Mid Cores | 4x Cortex-A720 @ 2.0 GHz |
| L2 Cache | 2 MB (X925) + 1 MB (X4) + 512 KB (A720) |
| L3 Cache | 12 MB |
| SLC | 10 MB |
| GPU | Arm Immortalis-G925 MC12 (12-core, hardware RT 2) |
| GPU Performance | vs Immortalis-G720 (Dimensity 9300) +41% Peak / +40% RT / -44% power |
| NPU | MediaTek 8th-gen NPU 890 (1 performance core + 1 flexible core) |
| AI Engine | Dimensity Agentic AI Engine (DAE) (world's first Agentic AI Engine) |
| AI Performance | 100% faster Diffusion inference, 80% faster LLM prompt, >50 token MLLM generation, 35% power savings |
| AI Features | on-device LoRA training, on-device video generation (Diffusion Transformer), Agentic AI, MoE LLM support |
| Memory | LPDDR5X 10667 Mbps (world's fastest phone memory) |
| Max Memory | 24 GB |
| Storage | UFS 4.0 (4-channel) |
| 5G | 3GPP Release-17, 4CC-CA, sub-6 GHz 7 Gbps |
| Wi-Fi | Wi-Fi 7 (dedicated 4nm co-processor, 7.3 Gbps) |
| Bluetooth | Bluetooth 6.0 |
| Launch Devices | Vivo X200 Pro (2024-10), OPPO Find X8, Xiaomi 15 |
| Launch Date | 2024-10-09 |
| Vivo X200 Pro Price | ~$900-$1,100 |
vs Snapdragon 8 Gen 3 / Dimensity 9300
| Metric | Dimensity 9400 | Snapdragon 8 Gen 3 | Dimensity 9300 |
|---|---|---|---|
| Process | 3nm N3E | 4nm TSMC N4P | 4nm TSMC N4P |
| CPU Cores | 8 (All Big) | 8 (1+5+2) | 8 (4+4) |
| Prime Core | Cortex-X925 @ 3.62 GHz | Cortex-X4 @ 3.3 GHz | Cortex-X4 @ 3.25 GHz |
| GPU | Immortalis-G925 MC12 | Adreno 750 | Immortalis-G720 MC12 |
| NPU | NPU 890 (8th gen) | Hexagon NPU | NPU 790 (7th gen) |
| Memory | LPDDR5X 10667 | LPDDR5X 8533 | LPDDR5X 9600 |
| Agentic AI | world's first | none | none |
| On-device LoRA | supported | not supported | not supported |
| On-device Video Gen | supported | not supported | not supported |
AI Performance Benchmarks
| Model / Task | Dimensity 9400 (NPU 890) | Notes |
|---|---|---|
| Stable Diffusion 3.5 | 2x Dimensity 9300 | Diffusion Transformer |
| Llama 3 8B (Q4) | 1.8x Dimensity 9300 | 80% faster LLM prompt |
| Phi-3.5 Mini (3.8B) | 50+ tokens/sec | MLLM generation |
| On-device LoRA Training (1B) | world first | fine-tune 1B model |
| On-device Video Gen (SD Video) | world first | generate 4s 480p video in seconds |
| GPT-4V-class VLM (Qwen-VL) | real-time | multimodal understanding |
| MoE LLM (Mixtral 8x7B) | supported | NPU flexible core scheduling |
| ETHZ v6 AI Benchmark | #1 in industry | leading AI performance |
Agentic AI Engine (DAE): Dimensity 9400 is the world's first mobile SoC supporting Agentic AI Engine. Agentic AI differs from traditional Generative AI: AI Agents can autonomously sense environments, make decisions, invoke tools, and execute multi-step tasks. Dimensity 9400's NPU 890, through its performance core + flexible core dual-core architecture, improves energy efficiency by 35%.
Use Cases
- Vivo X200 / X200 Pro (2024-10, ~$900 starting)
- OPPO Find X8 / Find X8 Pro (2024-10, ~$700 starting)
- Xiaomi 15 / 15 Pro (2024-10, $700 starting)
- Mobile LLM inference (80% faster LLM prompt)
- On-device AI training (1B model LoRA training)
- On-device video generation (Diffusion Transformer generates 4s video in seconds)
- AI Agent applications (autonomous multi-step tasks)
- Mobile gaming (Immortalis-G925 hardware RT 2 + 41% performance boost)
- Imaging (Imagiq 1090 full HDR zoom, Generative AI Zoom 100x)
Vendor Information
| Item | Information |
|---|---|
| Vendor | MediaTek Inc. (Hsinchu, Taiwan) |
| Design | MediaTek HQ design + ARM core IP license |
| Fab | TSMC Taiwan (3nm N3E line) |
| Software Stack | Android 15 (OriginOS 5 / ColorOS 15 / HyperOS 2) |
| AI Framework | MediaTek Dimensity Agentic AI Engine (DAE), MediaTek NeuroPilot SDK, Android NNAPI, ExecuTorch, LiteRT |
| Launch Customers | Vivo X200 (2024-10), OPPO Find X8, Xiaomi 15 |
| OEM Customers | Vivo, OPPO, Xiaomi, Honor, Samsung Galaxy (China/India), Transsion |
| Competitors | Qualcomm Snapdragon 8 Gen 3 / 8 Elite, Apple A18 / A18 Pro |
| 2025 Successor | Dimensity 9400+ (3.73 GHz X925, 2025-04) |
Key Features
- 2nd-gen 3nm (N3E) process
- 2nd-gen All Big Core design (1+3+4 octa-core)
- Cortex-X925 prime core (ARM's largest IPC improvement ever +15%)
- Cortex-X925 @ 3.62 GHz (strongest single-core mobile CPU)
- Immortalis-G925 MC12 GPU (41% perf / 40% RT / 44% power savings)
- MediaTek 8th-gen NPU 890 (dual-core: 1 performance + 1 flexible)
- Dimensity Agentic AI Engine (DAE) (world's first Agentic AI Engine)
- On-device LoRA training (world's first 1B model on-device training)
- On-device video generation (world's first Diffusion Transformer video)
- MoE LLM support (Mixtral 8x7B flexible core scheduling)
- LPDDR5X 10667 Mbps (world's fastest phone memory)
- Wi-Fi 7 (dedicated 4nm co-processor, 7.3 Gbps)
- Bluetooth 6.0, 5G sub-6 7 Gbps, 3GPP R17
- Imagiq 1090 (HDR zoom, Generative AI Zoom 100x)
- MiraVision 1090 (OLED de-burn compensation)
- 24-bit 384 KHz Bluetooth audio
Related Products
- Apple A18 Pro (iPhone 16 Pro) -- same-gen competitor
- Apple A19 Pro (iPhone 17 Pro) -- successor
- Qualcomm Snapdragon X Elite (PC chip) -- cross-category
- NVIDIA Jetson Thor (robotics SoC) -- edge AI
- Apple A18 (iPhone 16 base) -- same-gen base
- Architecture: NPU Mobile SoC -- NPU classification
- Dimensity 9400 Official Page