release: 1.8.0

[stainless-app]

Automated Release PR

1.8.0 (2026-02-23)

Full Changelog: v1.7.8...v1.8.0

Features

• add Anthropic Opus 4.6 (fka claude-fudge-eap) model support (f023c77)
• add conversation deletion endpoint (soft delete) [LET-7286] (702cdcb)
• add credit verification before agent message endpoints [LET-XXXX] (69f17af)
• add log probabilities from OpenAI-compatible servers (4575559)
• add template rollback endpoint [LET-7423] (7fbbc3b)
• add ToolReturnCreate to MessageCreateParams [LET-7366] (f870fce)
• allow users to specify via query to stip messages [LET-7392] (d0bc48a)
• core: structure memory directory and block labels [LET-7336] (56a57c7)
• Default to lightweight compaction model instead of agent's model (6921d55)
• make agent_id optional in conversations list endpoint [LET-7612] (b180f3e)
• New prompts/defaults for sliding_window and all compaction (9ac78e2)

Chores

• format all api.md files (8f75778)
• internal: add request options to SSE classes (45fe3f6)
• internal: bump dependencies (0416184)
• internal: fix lint error on Python 3.14 (1fa4d75)
• internal: remove mock server code (60c3a35)
• update mock server docs (ce42220)

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🔗 Stainless website
📚 Read the docs
🙋 Reach out for help or questions

[stainless-app]

🧪 Testing

To try out this version of the SDK, run:

pip install 'https://pkg.stainless.com/s/letta-sdk-python/45fe3f6400018b01d1d549129ae754e867adee65/letta_client-1.7.8-py3-none-any.whl'

Expires at: Wed, 25 Mar 2026 13:27:32 GMT
Updated at: Mon, 23 Feb 2026 13:27:32 GMT