Alternatives

# Best Open-Source Claude Alternatives in October 2026

> The strongest open-weight alternative to Claude as of October 2026 is Kimi K3 from Moonshot AI: 9.5 points behind Claude Fable 5.1, 3.3× cheaper per token; open weights. Compared against Claude Fable 5.1, Claude's current top model.
- Canonical page: https://noometry.com/alternatives/claude/open-source
- Last updated: 2026-10-11
- Title: Best Open-Source Claude Alternatives (October 2026)

The strongest open-weight alternative to Claude as of October 2026 is Kimi K3 from Moonshot AI: 9.5 points behind Claude Fable 5.1, 3.3× cheaper per token; open weights. Compared against Claude Fable 5.1, Claude's current top model.

Last verified October 11, 2026

1.  ## [Kimi K3](https://noometry.com/models/kimi-k3) Moonshot AI
    
    9.5 points behind Claude Fable 5.1, 3.3× cheaper per token; open weights.
    
    Score 59.5, $6 per M tokens blended.[Compare with Claude Fable 5.1](https://noometry.com/compare/claude-fable-5-1-vs-kimi-k3)
    
2.  ## [GLM-5.3](https://noometry.com/models/glm-5-3) Z.ai (Zhipu)
    
    14.2 points behind Claude Fable 5.1, 9.3× cheaper per token; open weights.
    
    Score 54.8, $2.15 per M tokens blended.[Compare with Claude Fable 5.1](https://noometry.com/compare/claude-fable-5-1-vs-glm-5-3)
    
3.  ## [DeepSeek V4 Pro](https://noometry.com/models/deepseek-v4-pro) DeepSeek
    
    14.7 points behind Claude Fable 5.1, 20.2× cheaper per token; open weights.
    
    Score 54.3, $0.99 per M tokens blended.[Compare with Claude Fable 5.1](https://noometry.com/compare/claude-fable-5-1-vs-deepseek-v4-pro)
    
4.  ## [MiMo-V2.6-Pro](https://noometry.com/models/mimo-v2-6-pro) Xiaomi
    
    18.8 points behind Claude Fable 5.1, 36.8× cheaper per token; open weights.
    
    Score 50.3, $0.54 per M tokens blended.[Compare with Claude Fable 5.1](https://noometry.com/compare/claude-fable-5-1-vs-mimo-v2-6-pro)
    
5.  ## [Inkling-Small](https://noometry.com/models/inkling-small) Thinking Machines Lab
    
    22.6 points behind Claude Fable 5.1, 31.4× cheaper per token; open weights.
    
    Score 46.5, $0.64 per M tokens blended.[Compare with Claude Fable 5.1](https://noometry.com/compare/claude-fable-5-1-vs-inkling-small)
    
6.  ## [Qwen3.5 397B-A17B](https://noometry.com/models/qwen3-5-397b-a17b) Alibaba (Qwen)
    
    23.0 points behind Claude Fable 5.1, 14.8× cheaper per token; open weights.
    
    Score 46.0, $1.35 per M tokens blended.[Compare with Claude Fable 5.1](https://noometry.com/compare/claude-fable-5-1-vs-qwen3-5-397b-a17b)
    
7.  ## [Hy4 preview](https://noometry.com/models/hy4-preview) Tencent
    
    23.8 points behind Claude Fable 5.1, 16.0× cheaper per token; open weights.
    
    Score 45.3, $1.25 per M tokens blended.[Compare with Claude Fable 5.1](https://noometry.com/compare/claude-fable-5-1-vs-hy4-preview)
    
8.  ## [MiniMax-M3](https://noometry.com/models/minimax-m3) MiniMax
    
    25.3 points behind Claude Fable 5.1, 38.1× cheaper per token; open weights.
    
    Score 43.8, $0.52 per M tokens blended.[Compare with Claude Fable 5.1](https://noometry.com/compare/claude-fable-5-1-vs-minimax-m3)
    

More: [All alternatives](https://noometry.com/alternatives/claude), [Cheaper](https://noometry.com/alternatives/claude/cheaper), [For coding](https://noometry.com/alternatives/claude/coding)

## Frequently asked questions

### What is the best alternative to Claude?

The strongest open-weight alternative to Claude as of October 2026 is Kimi K3 from Moonshot AI: 9.5 points behind Claude Fable 5.1, 3.3× cheaper per token; open weights. Compared against Claude Fable 5.1, Claude's current top model.

### How were these alternatives chosen?

Each is the highest-ranked model from a different provider with downloadable weights, compared on the Noometry Index against Claude Fable 5.1.