LocalAI

v4.2.1 Feature

This release adds 2 notable features for engineering teams evaluating rollout.

Published 23d Model Serving & MLOps

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Topics

agents ai api audio-generation decentralized distributed

+12 more

image-generation libp2p llama llm mamba mcp musicgen object-detection rerank stable-diffusion text-generation tts

ReleasePort's take

Moderate signal

editorial:auto 13d

LocalAI v4.2.1 introduces a ds4 backend enabling DeepSeek V4 Flash inference with tool calling and thinking support. Updated Go dependencies and Ollama API enhancements improve model discoverability and capability reporting.

Why it matters: Teams running LocalAI can now evaluate DeepSeek V4 Flash as an inference option. Check updated Ollama /api/tags and /api/show endpoints to verify model capabilities and compatibility before deploying.

Summary

AI summary

Added ds4 backend (DeepSeek V4 Flash) with tool calls, thinking, KV cache.

Changes in this release

Type	Severity	Summary	CVE
Feature	Medium	Add ds4 backend for DeepSeek V4 Flash with tool calls and thinking Add ds4 backend for DeepSeek V4 Flash with tool calls and thinking Source: llm_adapter@2026-05-21 Confidence: low	—
Feature	Medium	Report model capabilities and details in Ollama /api/tags and /api/show Report model capabilities and details in Ollama /api/tags and /api/show Source: llm_adapter@2026-05-21 Confidence: low	—
Dependency	Medium	Bump Go module dependencies in go_modules group with 2 updates Bump Go module dependencies in go_modules group with 2 updates Source: llm_adapter@2026-05-21 Confidence: low	—
Dependency	Medium	Update ik_llama.cpp library to specific commit hash version Update ik_llama.cpp library to specific commit hash version Source: llm_adapter@2026-05-21 Confidence: low	—

Full changelog

What's Changed

Exciting New Features 🎉

feat: add ds4 backend (DeepSeek V4 Flash) with tool calls, thinking, KV cache by @localai-bot in https://github.com/mudler/LocalAI/pull/9758

👒 Dependencies

chore(deps): bump the go_modules group across 1 directory with 2 updates by @dependabot[bot] in https://github.com/mudler/LocalAI/pull/9759

Other Changes

docs: :arrow_up: update docs version mudler/LocalAI by @localai-bot in https://github.com/mudler/LocalAI/pull/9762
ci(bump-deps): register ds4 + move version pin into the Makefile by @localai-bot in https://github.com/mudler/LocalAI/pull/9761
chore: :arrow_up: Update ikawrakow/ik_llama.cpp to eb570eb96689c235933b813693ca28ab9d3d26de by @localai-bot in https://github.com/mudler/LocalAI/pull/9764
feat(ollama): report model capabilities + details on /api/tags and /api/show by @localai-bot in https://github.com/mudler/LocalAI/pull/9766

Full Changelog: https://github.com/mudler/LocalAI/compare/v4.2.0...v4.2.1

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About LocalAI

LocalAI is the open-source AI engine. Run any model - LLMs, vision, voice, image, video - on any hardware. No GPU required.

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