tt-metal

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TT-NN is a Python & C++ Neural Network OP library.

API Reference | Model Demos

Featured Models

The Models team is focused on developing the following models, optimizing them for performance, accuracy, and compatibility. Follow each model link for more details.

[!IMPORTANT] For a full model list see the Model Matrix, or visit the Developer Hub.

[!NOTE] Performance Metrics:

• Time to First Token (TTFT) measures the time (in milliseconds) it takes to generate the first output token after input is received.
• T/S/U (Tokens per Second per User): Represents the throughput of first-token generation after prefill. It is calculated as 1 / inter-token latency.
• T/S (Tokens per Second): Represents total token throughput, calculated as T/S = T/S/U x batch size.
• TP (Tensor Parallel) and DP (Data Parallel): Indicate the parallelization factors across multiple devices.
• Reported LLM Performance: Based on an input sequence length of 128 tokens for all models.
• Performance Data Source: Metrics were collected using the tt-metal model demos (linked above). Results may vary when using other runtimes such as the vLLM inference server.

Llama 3.3 70B (TP=32)

Batch	Hardware	TTFT (MS)	T/S/U	TargetT/S/U	T/S	TT-Metalium Release	vLLM Tenstorrent Repo Release
32	Galaxy (Wormhole)	53	72.5	80	2268.8	v0.65.0-rc7	59be953

Qwen 2.5 7B (TP=2)

Batch	Hardware	TTFT (MS)	T/S/U	TargetT/S/U	T/S	TT-Metalium Release	vLLM Tenstorrent Repo Release
32	n300 (Wormhole)	109	22.1	30	707.2	v0.62.0-rc35	ced0161

Qwen 2.5 72B (TP=8)

Batch	Hardware	TTFT (MS)	T/S/U	TargetT/S/U	T/S	TT-Metalium Release	vLLM Tenstorrent Repo Release
32	QuietBox (Wormhole)	223	15.4	20	492.8	v0.62.0-rc25	e7c329b

Whisper (distil-large-v3)

Batch	Hardware	TTFT (MS)	T/S/U	TargetT/S/U	T/S	TT-Metalium Release
1	n150 (Wormhole)	163	105.0	45	105.0	v0.65.0-dev20251208
1	p150 (Blackhole)	63	263.4		263.4	v0.65.0-dev20251208

Mixtral 8x7B (TP=8)

Batch	Hardware	TTFT (MS)	T/S/U	TargetT/S/U	T/S	TT-Metalium Release
32	QuietBox (Wormhole)	122	24.9	33	796.8	v0.62.0-dev20251015

Blackhole software optimization is under active development. Please join us in shaping the future of open source AI! [Discord] [Developer Hub]

For more information regarding vLLM installation and environment creation visit the Tenstorrent vLLM TT plugin README. Note that the previously maintained vLLM TT fork is deprecated.

Model Updates

For the latest model updates and features, please see MODEL_UPDATES.md

Model Bring-Up and Testing

For information on initial model procedures, please see Model Bring-Up and Testing

TT-NN Tech Reports

• Advanced Performance Optimizations for Models (updated March 4th, 2025)
• CCL Performance Tuning Tips (updated Sept 24th, 2026)
• ViT Implementation in TT-NN on GS (updated Sept 22nd, 2024)
• LLMs Bring up in TT-NN (updated Oct 29th, 2024)
• CNN Bring up & Optimization in TT-NN (updated Jan 22nd, 2025)

Benchmarks

• Matrix Multiply FLOPS on Wormhole and Blackhole (updated June 17th, 2025)
• CCL Bandwidth on Wormhole and Blackhole (updated Sept 24th, 2026)

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TT-Metalium is our low-level programming model, enabling kernel development for Tenstorrent hardware.

Programming Guide | API Reference

Getting started

Get started with simple kernels.

TT-Metalium Tech Reports

• Matrix Engine (updated Sept 6th, 2024)
• Data Formats (updated Sept 7th, 2024)
• Reconfiguring Data Formats (updated Oct 17th, 2024)
• Handling special floating-point numbers (updated Oct 5th, 2024)
• Allocator (Updated Dec 19th, 2024)
• Tensor Layouts (updated Sept 6th, 2024)
• Saturating DRAM Bandwidth (updated Sept 6th, 2024)
• Flash Attention on Wormhole (updated Sept 6th, 2024)
• CNNs on TT Architectures (updated Sept 6th, 2024)
• Ethernet and Multichip Basics (Updated Sept 20th, 2024)
• Blackhole Bring-Up Programming Guide (Updated Dec 18th, 2024)
• Sub-Devices (Updated Jan 7th, 2025)

Scaleout Tech Reports

• Programming Mesh of Devices (Scale-Up) (updated Jan 6th, 2026)
• Programming Multiple Meshes (Scale-Out) (updated Jan 19th, 2026)
• TT-Fabric Architecture (updated Dec 1st, 2025)
• TT-Distributed Architecture (updated Oct 20th, 2025)

TT-Metalium Programming Examples

Hello World

• Hello World! Compute Kernel
• Hello World! Data Movement Kernel

Add Integers

• Add 2 Integers in Baby RiscV
• Add 2 Integers in Compute Kernel

Simple Tensor Manipulation

• Sharding
• Padding

DRAM Data Movement

• Dram Loopback Data Movement

Eltwise

• Eltwise Unary OP in Vector Engine (SFPU)
• Eltwise Binary OP in Matrix Engine (FPU)

Matmul

• Matmul OP on a Single_core
• Matmul OP on Multi_core (Basic)
• Matmul Multi_core Reuse (Optimized)
• Matmul Multi_core Multi-Cast (Optimized)

Tools and Instruments

TT-NN Visualizer

A comprehensive tool for visualizing and analyzing model execution, offering interactive graphs, memory plots, tensor details, buffer overviews, operation flow graphs, and multi-instance support with file or SSH-based report loading.

TT-Exalens

The TT-Exalens repository describes TT-Lensium, a low-level debugging tool for Tenstorrent hardware. It allows developers to access and communicate with Wormhole and Blackhole devices.

TT-SMI

The TT-SMI repository describes the Tenstorrent System Management Interface. This command line utility can interact with Tenstorrent devices on host. TT-SMI provides an easy to use interface displaying device, telemetry, and firmware information.

Model Explorer

The Model Explorer is an intuitive and hierarchical visualization tool using model graphs. It organizes model operations into nested layers and provides features for model exploration and debugging.

Tracy Profiler

The Tracy Profiler is a real-time nanosecond resolution, remote telemetry, hybrid frame, and sampling tool. Tracy supports profiling CPU, GPU, memory allocation, locks, context switches, and more.

Device Print Debug

DPRINT can print variables, addresses, and circular buffer data from kernels to the host terminal or log file. This feature is useful for debugging issues with kernels.

Watcher

Watcher monitors firmware and kernels for common programming errors, and overall device status. If an error or hang occurs, Watcher displays log data of that occurrence.

Inspector

Inspector provides insights into host runtime. It logs necessary data for investigation and allows queries to host runtime data.

Related Tenstorrent Projects

• TT-Forge
• TT-Forge-FE
• TT-Torch
• TT-XLA
• TT-MLIR
• TT-TVM

Latest Releases

Release	Release Date	FW Version	KMD Version	SMI Version
0.68.0	ETA Apr 30, 2026	19.2.0	2.5.0	3.0.38
0.67.4	Mar 30, 2026	19.2.0	2.5.0	3.0.38
0.67.0	Mar 25, 2026	19.2.0	2.5.0	3.0.38
0.66.0	Feb 18, 2026	19.2.0	2.5.0	3.0.38
0.65.1	Jan 12, 2026	19.2.0	2.5.0	3.0.38
0.65.0	Dec 15, 2025	19.2.0	2.5.0	3.0.38
0.64.5	Dec 1, 2025	18.12.0	2.4.1	3.0.32
0.64.4

Visit the releases folder for details on releases, release notes, and estimated release dates.

Tenstorrent Bounty Program Terms and Conditions

This repo is a part of Tenstorrent’s bounty program. If you are interested in helping to improve tt-metal, please make sure to read the Tenstorrent Bounty Program Terms and Conditions before heading to the issues tab. Look for the issues that are tagged with both “bounty” and difficulty level!

License

TT-Metalium and TTNN are licensed under the Apache 2.0 License, as detailed in LICENSE and LICENSE_understanding.txt.

Some distributable forms of this project—such as manylinux-compliant wheels—may need to bundle additional libraries beyond the standard Linux system libraries. For example:

• libnuma
• libhwloc
• openmpi (when built with multihost support)
• libevent (when built with multihost support)

These libraries are bound by their own license terms.