v1.83.7.rc.1

LiteLLM Releases / 4/12/2026

📰 NewsDeveloper Stack & InfrastructureTools & Practical Usage

共有:

Key Points

LiteLLM Docker images for version v1.83.7.rc.1 are signed using Sigstore cosign, and the article provides two ways to verify the image signature (recommended verification by pinned commit hash, and convenience verification by release tag).
The release signing uses a consistent public key introduced at a specific GitHub commit, enabling verification that signatures match the intended key.
The update includes a breaking change to Prometheus monitoring: the default LATENCY_BUCKETS (latency histogram boundaries) are reduced from 35 to 18.
Existing Prometheus dashboards or PromQL SLO queries that reference specific histogram le values (e.g., le="1.5" or le="9.5") will lose their series after upgrading, requiring review and updates.
The changelog highlights at least one additional fix focused on improving input validation on LiteLLM proxy management endpoints.

Verify Docker Image Signature

All LiteLLM Docker images are signed with cosign. Every release is signed with the same key introduced in commit 0112e53.

Verify using the pinned commit hash (recommended):

A commit hash is cryptographically immutable, so this is the strongest way to ensure you are using the original signing key:

cosign verify \
  --key https://raw.githubusercontent.com/BerriAI/litellm/0112e53046018d726492c814b3644b7d376029d0/cosign.pub \
  ghcr.io/berriai/litellm:v1.83.7.rc.1

Verify using the release tag (convenience):

Tags are protected in this repository and resolve to the same key. This option is easier to read but relies on tag protection rules:

cosign verify \
  --key https://raw.githubusercontent.com/BerriAI/litellm/v1.83.7.rc.1/cosign.pub \
  ghcr.io/berriai/litellm:v1.83.7.rc.1

Expected output:

The following checks were performed on each of these signatures:
  - The cosign claims were validated
  - The signatures were verified against the specified public key

⚠️ Breaking Changes

Prometheus default latency histogram buckets reduced (#25527)

The default LATENCY_BUCKETS has been reduced from 35 to 18 boundaries. If you have existing Prometheus dashboards or PromQL SLO queries that reference specific le values (e.g. le="1.5", le="9.5"), those series will no longer exist after upgrading. Review and update any affected queries or dashboard panels.

What's Changed

fix(proxy): improve input validation on management endpoints by @jaydns in #25445
fix(proxy): use parameterized query for combined_view token lookup by @jaydns in #25467
[Fix] Harden file path resolution in skill archive extraction by @yuneng-berri in #25475
merge main by @Sameerlite in #25524
[Fix] Align v1 guardrail and agent list responses with v2 field handling by @yuneng-berri in #25478
[Fix] Flush Tremor Tooltip timers in user_edit_view tests by @yuneng-berri in #25480
[Infra] Merge Dev Branch with Main by @yuneng-berri in #25526
docs: document april townhall announcements by @krrish-berri-2 in #25537
feat(anthropic): support advisor_20260301 tool type by @ishaan-berri in #25525
fix: a2a create a2a client default 60 second timeout by @milan-berri in #25514
fix(websearch_interception): ensure spend/cost logging runs when stream=True by @Sameerlite in #25424
fix(responses): map refusal stop_reason to incomplete status in streaming by @Sameerlite in #25498
feat(guardrails): optional skip system message in unified guardrail inputs by @Sameerlite in #25481
feat(bedrock): skip dummy user continue for assistant prefix prefill by @Sameerlite in #25419
feat(containers): Azure routing, managed container IDs, delete response parsing by @Sameerlite in #25287
fix(logging): preserve proxy key-auth metadata on /v1/messages Langfuse traces by @michelligabriele in #25448
Reduce default latency histogram bucket cardinality by @J-Byron in #25527
fix(s3): add retry with exponential backoff for transient S3 503/500 errors by @jimmychen-p72 in #25530
fix(proxy): preserve dict guardrail HTTPException.detail + bedrock context by @michelligabriele in #25558
Add "Screenshots / Proof of Fix" section to PR template by @krrish-berri-2 in #25564
fix(spend): session-TZ-independent date filtering for spend/error log queries by @ryan-crabbe-berri in #25542
[Fix] Align Org and Team Endpoint Permission Checks by @yuneng-berri in #25554
Litellm ishaan april10 by @ishaan-berri in #25545
Add file content streaming support for OpenAI and related utilities by @harish876 in #25450
[Infra] Merge dev with main by @yuneng-berri in #25568
Litellm harish april11 by @ishaan-berri in #25569
[Infra] Build UI for release by @yuneng-berri in #25571
added applyguardrail to inline iam by @shivamrawat1 in #25241
Team member permission /spend/logs for team-wide spend logs (UI + RBAC) by @shivamrawat1 in #25458
[Infra] Rebuild UI by @yuneng-berri in #25573
fix(proxy): pass-through multipart uploads and Bedrock JSON body by @shivamrawat1 in #25464
Litellm internal staging 04 11 2026 by @krrish-berri-2 in #25562
[Infra] Rebuild UI by @yuneng-berri in #25577
bump: version 1.83.6 → 1.83.7 by @yuneng-berri in #25578