Sleep-time Compute (Letta)
https://letta.com/blog/sleep-time-compute
Agents use idle time to reorganize and pre-reason over stored context ('learned context'). Letta ships this as sleep-time agents (v0.7.0+), where a background agent manages the primary agent's core memory. Traction: Shipped in Letta 0.7.0 and Letta Code (/sleeptime); arXiv 2504.13171. Letta's current source moved to letta-ai/letta-code; the V1 API server (where sleep-time agents first shipped) is retired to the letta-ai/letta archive branch. Letta Code's README now calls sleep-time compute 'dreaming': periodic dreaming via /sleeptime, manual /dream and /reflect, plus server-side dreaming.
Active · Verified 2026-10-29 · fresh as of 2026-10-29 · 13 cited facts, 1 with a third-party source · 2 recorded changes · Suggest a correction
At a glance
- Tier
- T3
- Created
- 2023-10-11 repo fix
- Latest release
- Letta Code v0.34.30 (npm @letta-ai/letta-code, 2026-10-29) registry fix
- License
- Apache-2.0 (Letta Code) repo fix
- GitHub
- letta-ai/letta-code — ~3.7k stars (current source; /sleeptime configures dreaming); letta-ai/letta ~25.3k stars, V1 server on its archive branch repo fix
- Pricing
- searched not found fix
- Funding
- searched not found fix
- Freshness
- 2026-10-29 fix
- Layer
- agent-infra repo fix
- Licensing
- open-source repo fix
- Developer activity
- OpenRank 0.7 (12-mo avg 5.04) · 11 participants — 2026-09 third-party fix
Memory taxonomy
- storage
- kv
- retrieval
- injection
- persistence
- long-term
- update
- consolidation
- unit
- summary
- governance
- inspectable
- conflict
- llm-arbitrate
When to use
Optimised for: searched not found
Anti-fit: searched not found
Pros & cons
Pros
searched not found
Cons
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Claims & capabilities
BRIEF Sleep-time compute is a new way to scale AI capabilities: letting models "think" during downtime. Instead of sitting idle between tasks, AI agents can now use their "sleep" time to process information and form new connections by rewriting their memory state. Read our research paper here , and learn how to make sleep-time agents in Letta on our docs .
Technical surface
- API surface
- searched not found
- Backend storage
- searched not found
- Deployment
- searched not found
- Embedding model
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- Multi-tenancy
- searched not found
- MCP
- searched not found
- A2A
- searched not found
- OpenTelemetry
- searched not found
Similar systems
Other recent method papers — theorized, no distinct product in the catalog, ranked by inbound references.
- Compressive Transformer T3
Maintains recent states in full resolution while compressing older memories with learned compression functions. DeepMind.
- MemGPT v2 / agent-tools T3
Already in catalog as the foundational MemGPT paper. Note: Letta is the productionised successor (cross-listed).
- Transformer-XL T3
Extends context through segment-level recurrence + caching of hidden states from prior segments. Foundational long-context architecture.
- Generative Agents T3
Park et al. — landmark agent-simulation paper. Reflection + memory stream + retrieval enable believable agent behavior.
- MemoryBank T3
Enhances LLMs with long-term memory. Early influential paper.
- Reflexion T3
Language agents with verbal reinforcement learning.
Sources (12 cited facts, 1 third-party)
Each fact links to the page it came from; the badge says who published it (how to read sources).
- What it is Paper vendor
- What it does & what's distinct Agents use idle time to reorganize and pre-reason over stored context ('learned context'… repo
- Claims / benefits BRIEF Sleep-time compute is a new way to scale AI capabilities: letting models "thi… vendor
- Created 2023-10-11 repo
- Latest release Letta Code v0.34.30 (npm @letta-ai/letta-code, 2026-10-29) registry
- License Apache-2.0 (Letta Code) repo
- GitHub letta-ai/letta-code — ~3.7k stars (current source; /sleeptime configures dreaming); lett… repo
- Mindshare 25229 GitHub stars repo
- Project & sources https://letta.com/blog/sleep-time-compute ; https://github.com/letta-ai/letta vendor
- licensing-bucket open-source repo
- taxonomy-three-layer-rollup agent-infra repo
- developer-activity-opendigger {"activity":20.5,"as_of":"2026-09","openrank_12mo":5.04,"openrank_current":0.7,"particip… third-party
What changed
Changes to this record's lifecycle, licence, release, pricing and hosting facts, from the catalog's git history. Subscribe (Atom)