M-Thinker-1.5B-Iter1
M-Thinker-1.5B-Iter1 is a 2 billion parameter chat model from XueZhang-bjtu, released October 13, 2025. M-Thinker-1.5B-Iter1 is an open-weights chat model with roughly 2 billion parameters.
by XueZhang-bjtu · 2B parameters
Best for
Ways to use M-Thinker-1.5B-Iter1 in osFoundry
Connect with your own key (BYOK)
Open the key dialog and paste your XueZhang-bjtu API key. osFoundry discovers M-Thinker-1.5B-Iter1 automatically — assign it to a Maestro role (router, direct, orchestrator, or fallback) in the Pipeline tab and it is live in every chat. Your key, your provider account — no token markup.
Deploy a dedicated endpoint
M-Thinker-1.5B-Iter1 is open-weights — run it locally for free, or deploy a dedicated GPU endpoint in your workspace for reserved capacity with no rate limits.
Use it in a Room App
Room Apps declare AI features in their manifest, then call them with invokeAI:
import { invokeAI } from '@osfoundry/app-sdk'
// 'summarize' is an AI feature declared in your app manifest.
const result = await invokeAI('summarize', userText)
Call it from your own apps
Once a model is wired into your workspace you can host it as an API and reach it from your own services, scripts, or CI — outside osFoundry.
What hardware can run M-Thinker-1.5B-Iter1
M-Thinker-1.5B-Iter1 runs on a single 16GB consumer GPU (~2 GB VRAM with KV-cache headroom). Full-precision inference fits on a single H100 80GB at FP16 precision (~5 GB).
M-Thinker-1.5B-Iter1 vs similar models
Licence
Unspecified — Licence terms not specified — verify the upstream model card before commercial use.
Check upstream documentation.
Frequently asked about M-Thinker-1.5B-Iter1
Is M-Thinker-1.5B-Iter1 free to use?
M-Thinker-1.5B-Iter1 is free to run locally on your own hardware. Hosted access through osFoundry is metered (input Free (local), output Free (local)). You can switch between local and hosted at any time.
Can I use M-Thinker-1.5B-Iter1 commercially?
Commercial use is allowed with conditions. Licence terms not specified — verify the upstream model card before commercial use. Check upstream documentation.
How much VRAM does M-Thinker-1.5B-Iter1 need?
Approximately 2 GB at Q4 quantisation, or 5 GB at full FP16 precision. Fits on a single 24GB consumer GPU.
Can I run M-Thinker-1.5B-Iter1 locally?
Yes. M-Thinker-1.5B-Iter1 is open-weights and runs locally on a workstation GPU. osFoundry's local runtime handles model loading, quantisation, and routing.
What is M-Thinker-1.5B-Iter1 best at?
M-Thinker-1.5B-Iter1 is well-suited to text generation.
How do I use M-Thinker-1.5B-Iter1 in osFoundry?
Paste your XueZhang-bjtu API key in the key dialog (or deploy the open weights for self-hostable models), assign M-Thinker-1.5B-Iter1 to a Maestro role in the Pipeline tab, then use it in chat, Room Apps via invokeAI, or your own apps.
Published by XueZhang-bjtu on October 13, 2025. Source: https://huggingface.co/XueZhang-bjtu/M-Thinker-1.5B-Iter1