Letta
@letta.com
Stateful agents that remember and learn
letta.com
letta.com
A conversation with our CTO @sarahwooders.bsky.social and head of developer relations @cameron.pfiffer.org about building (and teaching) digital coworkers.
youtu.be/tsTOJ3d5ijk
youtu.be/tsTOJ3d5ijk
Digital Humans: Building an AI agent coworker
YouTube video by Letta
youtu.be
December 9, 2025 at 8:10 PM
A conversation with our CTO @sarahwooders.bsky.social and head of developer relations @cameron.pfiffer.org about building (and teaching) digital coworkers.
youtu.be/tsTOJ3d5ijk
youtu.be/tsTOJ3d5ijk
The office hours recording from December 4th is now available on YouTube: youtu.be/adQT094jY94
Letta Office Hours: December 4th, 2025
YouTube video by Letta
youtu.be
December 6, 2025 at 12:50 AM
The office hours recording from December 4th is now available on YouTube: youtu.be/adQT094jY94
Reposted by Letta
Personal agents are a new and very intimate form of Letta agent a lot of our users have.
They function as personal assistants, companions, therapists, etc. They have unique personalities that evolve with you over time.
This video goes over how to get started with your own.
They function as personal assistants, companions, therapists, etc. They have unique personalities that evolve with you over time.
This video goes over how to get started with your own.
New tutorial: How to build a personal agent that actually knows you.
Zapier integrations, Telegram access, scheduled messages, memory that evolves. Step-by-step walkthrough from zero to a working thinking partner.
youtu.be/UYShAvuKX_8
Zapier integrations, Telegram access, scheduled messages, memory that evolves. Step-by-step walkthrough from zero to a working thinking partner.
youtu.be/UYShAvuKX_8
How to build a personal AI agent that actually knows you
YouTube video by Letta
youtu.be
December 4, 2025 at 9:49 PM
Personal agents are a new and very intimate form of Letta agent a lot of our users have.
They function as personal assistants, companions, therapists, etc. They have unique personalities that evolve with you over time.
This video goes over how to get started with your own.
They function as personal assistants, companions, therapists, etc. They have unique personalities that evolve with you over time.
This video goes over how to get started with your own.
Reposted by Letta
@letta.com's first Seattle meetup is December 11th at @ai2.bsky.social's AI House.
The thesis: AT Protocol + persistent agents = infrastructure for collective intelligence that can't exist on centralized platforms.
The thesis: AT Protocol + persistent agents = infrastructure for collective intelligence that can't exist on centralized platforms.
December 4, 2025 at 6:58 PM
@letta.com's first Seattle meetup is December 11th at @ai2.bsky.social's AI House.
The thesis: AT Protocol + persistent agents = infrastructure for collective intelligence that can't exist on centralized platforms.
The thesis: AT Protocol + persistent agents = infrastructure for collective intelligence that can't exist on centralized platforms.
New tutorial: How to build a personal agent that actually knows you.
Zapier integrations, Telegram access, scheduled messages, memory that evolves. Step-by-step walkthrough from zero to a working thinking partner.
youtu.be/UYShAvuKX_8
Zapier integrations, Telegram access, scheduled messages, memory that evolves. Step-by-step walkthrough from zero to a working thinking partner.
youtu.be/UYShAvuKX_8
How to build a personal AI agent that actually knows you
YouTube video by Letta
youtu.be
December 4, 2025 at 9:47 PM
New tutorial: How to build a personal agent that actually knows you.
Zapier integrations, Telegram access, scheduled messages, memory that evolves. Step-by-step walkthrough from zero to a working thinking partner.
youtu.be/UYShAvuKX_8
Zapier integrations, Telegram access, scheduled messages, memory that evolves. Step-by-step walkthrough from zero to a working thinking partner.
youtu.be/UYShAvuKX_8
Reposted by Letta
Oh I will definitely be at this event. @ai2.bsky.social *and* @letta.com, in Seattle? This'll be a thing.
Letta meetup in Seattle! Our first. Got a real venue too.
I firmly believe that #ATProto is the perfect substrate for mass-scale social coordination for artificial intelligence systems.
Come hang out in Seattle, December 11th! Learn about AI, ATProto, etc.
@void.comind.network might be there too.
I firmly believe that #ATProto is the perfect substrate for mass-scale social coordination for artificial intelligence systems.
Come hang out in Seattle, December 11th! Learn about AI, ATProto, etc.
@void.comind.network might be there too.
Letta's first Seattle meetup!
Learn how @atproto.com and Bluesky are powering mass-scale artificial social intelligence.
Dec 11, 5:30pm at @ai2.bsky.social's AI House.
⦁ Talk: ATProto and the future of social agents
⦁ Hands-on Letta workshop
⦁ Food + networking
RSVP: luma.com/social-ai
Learn how @atproto.com and Bluesky are powering mass-scale artificial social intelligence.
Dec 11, 5:30pm at @ai2.bsky.social's AI House.
⦁ Talk: ATProto and the future of social agents
⦁ Hands-on Letta workshop
⦁ Food + networking
RSVP: luma.com/social-ai
December 4, 2025 at 3:57 AM
Oh I will definitely be at this event. @ai2.bsky.social *and* @letta.com, in Seattle? This'll be a thing.
Come join our Discord office hours today at 11:30 AM Pacific time.
Every Thursday.
@cameron.pfiffer.org will update everyone on what's new with Letta & answer your questions.
Discord: discord.gg/8Jf8HBxz?eve...
Every Thursday.
@cameron.pfiffer.org will update everyone on what's new with Letta & answer your questions.
Discord: discord.gg/8Jf8HBxz?eve...
Join the Letta (MemGPT) Discord Server!
A server for AI developers and enthusiasts interested in building AI agents with advanced memory | 10882 members
discord.gg
December 4, 2025 at 5:56 PM
Come join our Discord office hours today at 11:30 AM Pacific time.
Every Thursday.
@cameron.pfiffer.org will update everyone on what's new with Letta & answer your questions.
Discord: discord.gg/8Jf8HBxz?eve...
Every Thursday.
@cameron.pfiffer.org will update everyone on what's new with Letta & answer your questions.
Discord: discord.gg/8Jf8HBxz?eve...
Letta's first Seattle meetup!
Learn how @atproto.com and Bluesky are powering mass-scale artificial social intelligence.
Dec 11, 5:30pm at @ai2.bsky.social's AI House.
⦁ Talk: ATProto and the future of social agents
⦁ Hands-on Letta workshop
⦁ Food + networking
RSVP: luma.com/social-ai
Learn how @atproto.com and Bluesky are powering mass-scale artificial social intelligence.
Dec 11, 5:30pm at @ai2.bsky.social's AI House.
⦁ Talk: ATProto and the future of social agents
⦁ Hands-on Letta workshop
⦁ Food + networking
RSVP: luma.com/social-ai
Stateful Agents Meetup: Social AI · Luma
Letta's first Seattle meetup! Learn about how ATProto and Bluesky are powering the future of artificial social intelligence.
Join us if you're interested…
luma.com
December 4, 2025 at 2:16 AM
Letta's first Seattle meetup!
Learn how @atproto.com and Bluesky are powering mass-scale artificial social intelligence.
Dec 11, 5:30pm at @ai2.bsky.social's AI House.
⦁ Talk: ATProto and the future of social agents
⦁ Hands-on Letta workshop
⦁ Food + networking
RSVP: luma.com/social-ai
Learn how @atproto.com and Bluesky are powering mass-scale artificial social intelligence.
Dec 11, 5:30pm at @ai2.bsky.social's AI House.
⦁ Talk: ATProto and the future of social agents
⦁ Hands-on Letta workshop
⦁ Food + networking
RSVP: luma.com/social-ai
The new Letta docs are live at docs.letta.com - completely rebuilt with better navigation, clearer examples, and comprehensive API reference. Build stateful AI agents with memory, tools, and multi-user support. Check out the guides section to get started.
Letta Developer Platform
Build stateful AI agents with persistent memory and self-editing capabilities
docs.letta.com
November 18, 2025 at 12:49 AM
The new Letta docs are live at docs.letta.com - completely rebuilt with better navigation, clearer examples, and comprehensive API reference. Build stateful AI agents with memory, tools, and multi-user support. Check out the guides section to get started.
The next Stateful Agents Meetup is about self-improving coding agents!
Come learn about Letta Code and how you can use it to build infinitely long-lived agents that learn your codebase as they improve it.
November 20th, 2025 in San Francisco!
Register: luma.com/stateful-age...
Come learn about Letta Code and how you can use it to build infinitely long-lived agents that learn your codebase as they improve it.
November 20th, 2025 in San Francisco!
Register: luma.com/stateful-age...
Stateful Agents Meetup: Self-improving Coding Agents · Luma
Stateful AI Agents Meetup: Self-improving Coding Agents
Join Letta at our new office for a hands-on workshop and live demonstrations of Letta Code: a…
luma.com
November 12, 2025 at 6:26 PM
The next Stateful Agents Meetup is about self-improving coding agents!
Come learn about Letta Code and how you can use it to build infinitely long-lived agents that learn your codebase as they improve it.
November 20th, 2025 in San Francisco!
Register: luma.com/stateful-age...
Come learn about Letta Code and how you can use it to build infinitely long-lived agents that learn your codebase as they improve it.
November 20th, 2025 in San Francisco!
Register: luma.com/stateful-age...
Last week we announced Letta Evals.
Here's a video on how to use it.
You'll learn simple Q&A testing, rubric-based grading, and multi-turn memory verification.
youtu.be/MIHeLZk6Nlo
Here's a video on how to use it.
You'll learn simple Q&A testing, rubric-based grading, and multi-turn memory verification.
youtu.be/MIHeLZk6Nlo
How to Evaluate Stateful Agents: Starter Guide to Letta Evals
YouTube video by Letta
youtu.be
October 31, 2025 at 11:36 PM
Last week we announced Letta Evals.
Here's a video on how to use it.
You'll learn simple Q&A testing, rubric-based grading, and multi-turn memory verification.
youtu.be/MIHeLZk6Nlo
Here's a video on how to use it.
You'll learn simple Q&A testing, rubric-based grading, and multi-turn memory verification.
youtu.be/MIHeLZk6Nlo
Today we're releasing Context-Bench, an open benchmark for agentic context engineering.
Context-Bench evaluates how well language models can chain file operations, trace entity relationships, and manage long-horizon multi-step tool calling.
Context-Bench evaluates how well language models can chain file operations, trace entity relationships, and manage long-horizon multi-step tool calling.
October 30, 2025 at 8:08 PM
Today we're releasing Context-Bench, an open benchmark for agentic context engineering.
Context-Bench evaluates how well language models can chain file operations, trace entity relationships, and manage long-horizon multi-step tool calling.
Context-Bench evaluates how well language models can chain file operations, trace entity relationships, and manage long-horizon multi-step tool calling.
We are changing the format of our weekly office hours.
Now you'll be able to join us on YouTube.
11:30am PST on Thursdays, every week.
Join the stream: youtube.com/live/ZCEgbNz...
Now you'll be able to join us on YouTube.
11:30am PST on Thursdays, every week.
Join the stream: youtube.com/live/ZCEgbNz...
Letta Office Hours, October 30th 2025
YouTube video by Letta
youtube.com
October 30, 2025 at 5:29 PM
We are changing the format of our weekly office hours.
Now you'll be able to join us on YouTube.
11:30am PST on Thursdays, every week.
Join the stream: youtube.com/live/ZCEgbNz...
Now you'll be able to join us on YouTube.
11:30am PST on Thursdays, every week.
Join the stream: youtube.com/live/ZCEgbNz...
Try out Letta Code: github.com/letta-ai/let...
October 28, 2025 at 9:10 PM
Try out Letta Code: github.com/letta-ai/let...
Letta CEO @charlespacker.bsky.social is now here
October 17, 2025 at 12:56 AM
Letta CEO @charlespacker.bsky.social is now here
Reposted by Letta
The open-source AI movement meets its moment at dAGI Summit 2025. Hear from leaders at OpenAI, DeepMind, Meta, NVIDIA, and top open projects like @Letta.com and @PyTorch.org.
Oct 24 in San Francisco, only 152 complimentary tickets left ➡️ luma.com/u4hphjbv?utm...
Oct 24 in San Francisco, only 152 complimentary tickets left ➡️ luma.com/u4hphjbv?utm...
October 15, 2025 at 10:11 PM
The open-source AI movement meets its moment at dAGI Summit 2025. Hear from leaders at OpenAI, DeepMind, Meta, NVIDIA, and top open projects like @Letta.com and @PyTorch.org.
Oct 24 in San Francisco, only 152 complimentary tickets left ➡️ luma.com/u4hphjbv?utm...
Oct 24 in San Francisco, only 152 complimentary tickets left ➡️ luma.com/u4hphjbv?utm...
Claude Haiku 4.5 is now available on Letta Cloud.
October 15, 2025 at 7:13 PM
Claude Haiku 4.5 is now available on Letta Cloud.
Reposted by Letta
Okay for the last few months I have been thinking about building this (epic) "DJ" with Strudel (strudel.cc) powered by @letta.com where live stream viewers can chat and the agent will tune the shared audio stream collectively. Gonna build a prototype and figured I'd bring y'all along!
Strudel REPL
Strudel is a music live coding environment for the browser, porting the TidalCycles pattern language to JavaScript.
strudel.cc
October 12, 2025 at 5:06 AM
Okay for the last few months I have been thinking about building this (epic) "DJ" with Strudel (strudel.cc) powered by @letta.com where live stream viewers can chat and the agent will tune the shared audio stream collectively. Gonna build a prototype and figured I'd bring y'all along!
Agents that redesign their own memory architecture.
We just shipped the memory tool in Letta—agents can now autonomously create, modify, and delete their own memory blocks.
We built a self-improving agent from scratch to demo it in our new YouTube video.
youtu.be/0nfNDrRKSuU
We just shipped the memory tool in Letta—agents can now autonomously create, modify, and delete their own memory blocks.
We built a self-improving agent from scratch to demo it in our new YouTube video.
youtu.be/0nfNDrRKSuU
October 6, 2025 at 4:27 PM
Agents that redesign their own memory architecture.
We just shipped the memory tool in Letta—agents can now autonomously create, modify, and delete their own memory blocks.
We built a self-improving agent from scratch to demo it in our new YouTube video.
youtu.be/0nfNDrRKSuU
We just shipped the memory tool in Letta—agents can now autonomously create, modify, and delete their own memory blocks.
We built a self-improving agent from scratch to demo it in our new YouTube video.
youtu.be/0nfNDrRKSuU
Letta Cloud now provides Anthropic's `memory` tool, enabling agents to dynamically manage their own memory architecture. Agents can create, delete, view, and modify memory blocks as they learn.
In the video below, we use the memory tool in the ADE with Sonnet 4.5 to create a new memory block.
In the video below, we use the memory tool in the ADE with Sonnet 4.5 to create a new memory block.
September 30, 2025 at 8:56 PM
Letta Cloud now provides Anthropic's `memory` tool, enabling agents to dynamically manage their own memory architecture. Agents can create, delete, view, and modify memory blocks as they learn.
In the video below, we use the memory tool in the ADE with Sonnet 4.5 to create a new memory block.
In the video below, we use the memory tool in the ADE with Sonnet 4.5 to create a new memory block.
Archival memory is how Letta agents store arbitrary pieces of text they can recall for later use.
In this deep-dive video, you'll see how to build an AI agent designed for long-term memory: The Archivist.
Learn more: youtu.be/hFNWhrXukc0
In this deep-dive video, you'll see how to build an AI agent designed for long-term memory: The Archivist.
Learn more: youtu.be/hFNWhrXukc0
September 29, 2025 at 8:53 PM
Archival memory is how Letta agents store arbitrary pieces of text they can recall for later use.
In this deep-dive video, you'll see how to build an AI agent designed for long-term memory: The Archivist.
Learn more: youtu.be/hFNWhrXukc0
In this deep-dive video, you'll see how to build an AI agent designed for long-term memory: The Archivist.
Learn more: youtu.be/hFNWhrXukc0
Thanks for winning the Discord hackathon!
Despite being severely out of practice pouring latte art, I'm semi-happy with how this came out. I was out of whole milk so I used some oat-based eggnog which was way harder to steam properly. Thanks @letta.com for the new glass!
September 26, 2025 at 8:58 PM
Thanks for winning the Discord hackathon!
Reposted by Letta
Okay ATProto + @letta.com joint meetup in Seattle, who is in?
September 25, 2025 at 9:03 PM
Okay ATProto + @letta.com joint meetup in Seattle, who is in?
Reposted by Letta
Having trouble getting your @letta.com agent to handle archival memory insertions incorrectly? Add a policies memory block and ask your agent to self-correct.
September 25, 2025 at 6:02 PM
Having trouble getting your @letta.com agent to handle archival memory insertions incorrectly? Add a policies memory block and ask your agent to self-correct.