Open-Source Alternatives to 
Mistral Medium 3.5
The best open-weight, self-hostable alternatives to Mistral Medium 3.5 in 2026 — compared on price, context window and capabilities. Run them locally and cut API costs.
Refreshed from live data · olud.ai
The best open-weight alternatives to Mistral Medium 3.5
Mistral Medium 3.5 is a proprietary, API-only model. These open-weight models can be self-hosted, run offline and used at a fraction of the cost — here's how the top ones stack up.
Step 3.7 Flash Open
Within 0.4 pts of Mistral Medium 3.5 on the Artificial Analysis intelligence index · 6.5× cheaper per million output tokens
Step 3.7 Flash is StepFun's latest high-efficiency multimodal Mixture-of-Experts model. It pairs a 196B-parameter language backbone with a vision encoder for native image and video understanding, activating roughly 11B parameters...
Step 3.7 Flash vs Mistral Medium 3.5 →Gemma 4 31B Open
Within 0.5 pts of Mistral Medium 3.5 on the Artificial Analysis intelligence index · 22.1× cheaper per million output tokens
Gemma 4 31B Instruct is Google DeepMind's 30.7B dense multimodal model supporting text and image input with text output. Features a 256K token context window, configurable thinking/reasoning mode, native function...
Gemma 4 31B vs Mistral Medium 3.5 →See the full open-source leaderboard
Live ranking of open-weight models with pricing, context windows and capabilities.
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