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Open Source Anthropic Claude API Alternatives

Discover 3 open source alternatives to Anthropic Claude API. All free, community-driven, and actively maintained.

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What is Anthropic Claude API?

API service providing access to Claude, an AI assistant for text generation and analysis tasks.

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ollama
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ollama

Get up and running with Kimi-K2.5, GLM-5, MiniMax, DeepSeek, gpt-oss, Qwen, Gemma and other models.

LLM
unsloth
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unsloth

Web UI for training and running open models like Gemma 4, Qwen3.5, DeepSeek, gpt-oss locally.

LLM
LocalAI
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LocalAI

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

LLM