MiniMax M3 Pro is expected to be a 2.7-trillion-parameter model, released with open weights, possibly as early as Q3 2026. That figure and timing come from The Information; MiniMax has not officially confirmed the name, the size, or a date, and nothing is downloadable yet. This is a preview of what's coming, not a spec sheet you can build against today.
The headline: a 2.7-trillion-parameter open model
At 2.7 trillion parameters, M3 Pro would be roughly 6.3× the size of MiniMax's current flagship, and among the largest models ever released with open weights. The plan, as reported, is to ship the weights openly rather than keep the model API-only — which is the detail that makes it interesting rather than just big.
Q3 2026 is a target, not a commitment. The report ties the open release to China's ongoing policy discussions around open-source AI, so the date can slip and the license terms are still unknown.
Why 2.7 trillion is the number that matters
Raw parameter count sets a capability ceiling, but MiniMax's recent models are sparse Mixture-of-Experts designs that activate only a fraction of their weights per token. The current M3 runs just ~23B active out of ~428B total, which is why it serves cheaply despite its size. How MiniMax sizes M3 Pro's active layer will decide almost everything about it:
Keep active params modest and a 2.7T model could stay affordable to run while lifting the quality ceiling well above today's open models.
Scale active params up with total size and serving cost, latency, and hardware requirements climb steeply.
Either way, the practical takeaway for most people is the same: a 2.7T model, even a sparse one, is not something you run on a laptop. Expect multi-GPU servers at minimum. "Open weights" here means cloud hosts and well-resourced teams can deploy it, not that it lands on consumer hardware.
What M3 Pro would change if it ships
A large open-weight model at this scale is a competitive move aimed at the frontier tier — the top proprietary models from OpenAI and Anthropic, and open rivals like the DeepSeek V4 line. Two things would follow:
Cost pressure at the top end. Open models already undercut proprietary API pricing by an order of magnitude. A frontier-class open release pushes that harder.
Control for teams that need it. Weights you host yourself matter for data residency, fine-tuning, and avoiding per-token bills at scale — none of which an API-only model offers.
The open question is whether the weights ship at all. That decision is the least certain part of the whole picture, because it depends on policy calls outside MiniMax's control.
What's still unconfirmed
Treat the following as reported, not final:
2.7 trillion parameters — a size, not a benchmark. It says nothing yet about how good the model is.
"Open source" vs "open weights" — these are not the same. The current M3 ships downloadable weights under a restrictive, non-commercial-default license. Whether M3 Pro is genuinely open-source or open-weight with strings attached is unknown.
Q3 2026 timing — provisional and policy-dependent.
Benchmarks, pricing, context window — none reported.
Where it sits against M3
If you need a MiniMax model now, M3 Pro isn't it — the current M3 is the one that's live, and it's a capable ~428B open-weight model available on Hugging Face and via hosts like Fireworks AI and OpenRouter. M3 Pro is the much larger successor being lined up behind it.
For anyone budgeting today, the real decision isn't M3 vs M3 Pro — it's open vs proprietary. Open models sit near a few cents per million tokens against several dollars for frontier proprietary models, the same gap you see in any open-Chinese-model vs Claude comparison. Plan around that, and treat M3 Pro as a Q3 watch item rather than something to wait on.
FAQ
When will MiniMax M3 Pro be released?
No date is confirmed. The Information reported it could arrive as early as Q3 2026, a provisional target that may shift with China's open-source policy decisions.
How many parameters does MiniMax M3 Pro have?
A reported 2.7 trillion — about 6.3× the current M3. MiniMax has not confirmed the figure.
Is MiniMax M3 Pro open source?
A release with open weights is planned but not finalized, and it's unclear whether it would be fully open-source or open-weight under a restrictive license.
Can I download MiniMax M3 Pro now?
No. It isn't public. If you want a MiniMax model today, download M3 from Hugging Face.
Is MiniMax M3 Pro confirmed?
No. The details rest on reporting from The Information, and MiniMax has not officially acknowledged the model or a launch plan.