v1.99.1

Docker-only release

This release ships container images only. There is no PyPI package for 1.99.1.

pip install litellm==1.99.1 will not resolve — install the images below, or stay on 1.99.0 on PyPI. The git tag and this release exist so the images are traceable to an exact commit.

Image	Tags
ghcr.io/berriai/litellm · docker.io/litellm/litellm	1.99.1, v1.99.1
ghcr.io/berriai/litellm-database · docker.io/litellm/litellm-database	1.99.1, v1.99.1
ghcr.io/berriai/litellm-non_root · docker.io/litellm/litellm-non_root	1.99.1, v1.99.1

This is the newest stable image, so the rolling latest and main-stable image tags now point at 1.99.1.

It carries one fix on top of 1.99.0: OpenTelemetry v2 spans now emit cache token counts (gen_ai.usage.cache_creation.input_tokens and gen_ai.usage.cache_read.input_tokens) alongside the cache cost that was already reported. If you compute spend from OTel token counts rather than from LiteLLM's own cost fields, prompt-caching workloads were previously under-counted.

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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:v1.99.1

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/v1.99.1/cosign.pub \
  ghcr.io/berriai/litellm:v1.99.1

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

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What's Changed

• chore(release): backport #38716 to stable/1.99.x and cut 1.99.1 by @yuneng-berri in #39179

Full Changelog: v1.99.0...v1.99.1