# MiniMax shipped an 'open-weight' model with no weights. Bold.

> MiniMax M3 launched 1 June 2026 as 'open-weight' — but the weights weren't released.

*Frontier claims, vendor benchmarks, and a Hugging Face link that wasn't there yet.*

By The InsidersFeed Desk · InsidersFeed
Canonical: https://insidersfeed.com/news/minimax-m3-open-weight-no-weights

> **Key:** **The take:** calling something 'open-weight' on launch day while the weights don't exist publicly yet is a marketing choice, not a technical fact. M3 may well be great. We just can't check, which is the whole point of open weights.

MiniMax's **M3** arrived on 1 June with the maximal pitch: first open-weight model to fuse frontier coding, million-token context and native multimodality. SWE-Bench Pro 59%, ahead of GPT-5.5 and Gemini 3.1 Pro. Pricing about a tenth of the closed frontier. Cracking — if you take it on faith.

## What you couldn't do on launch day

Download it. Reproduce the benchmark. Self-host it. MiniMax said the weights would hit Hugging Face 'within about ten days', which means the one feature that distinguishes an open model from a closed one — you can actually run it — was a promise. The benchmarks, meanwhile, are vendor-run, on a brand-new model, with no independent check possible.

> **Note:** **To be fair:** MiniMax has a real track record (the M-series is genuinely good), the price is genuinely disruptive, and 'weights in ten days' is a normal, often-honoured cadence. If the weights land and the numbers hold, we'll say so loudly.

The market couldn't decide either: MiniMax's Hong Kong stock popped ~5% then closed down ~12% the same session — a launch and a gut-check in one afternoon. And the unglamorous footnote: under 12% on ARC-AGI-2. Coding monster, maybe; reasoning monster, no. Wait for the weights before you believe the chart.

## FAQ

### Is MiniMax M3 actually open-weight?
It was announced as open-weight, but the weights weren't published at launch on 1 June 2026 — MiniMax promised them on Hugging Face within roughly ten days. Until they're out and reproducible, the label is a commitment, not a verified fact.

### Should I trust the 59% SWE-Bench Pro number?
Cautiously. It's MiniMax's own figure on its own model, and at launch nobody outside could reproduce it because the weights weren't available. Strong if confirmed; treat as a claim until independent testing lands.