Official entity
MiMo-V2.5-Pro is an open-source Mixture-of-Experts model from Xiaomi MiMo. It is not MiMo-V2-Flash, MiMo-V2-Pro, or a Xiaomi phone assistant.
English
MODEL ID FIRST
MiMo 2.5 Pro in SillyTavern
MiMo-V2.5-Pro is Xiaomi MiMo’s open-weight Pro model. The official API tag is `mimo-v2.5-pro`. This guide checks the identity, connects the endpoint, and then separates RP settings from provider behavior.
Important: the current Tabbit model lists do not include MiMo-V2.5-Pro. This page does not promise a native Tabbit MiMo endpoint.
IDENTITY CHECK
Use the name Xiaomi publishes
Search results mix the model family, local weights, and router slugs. The official page gives one clean reference point.
Release and scale
Xiaomi dates the release to April 27, 2026. The Pro model has 1.02T total parameters, 42B active parameters, and a 1M-token context window.
What the page claims
The model targets agentic work, complex software engineering, and long-horizon tasks. Those claims and vendor examples are not a SillyTavern roleplay benchmark.
| Check | MiMo-V2.5-Pro | Do not substitute |
|---|---|---|
| API model tag | `mimo-v2.5-pro` | `mimo-v2-flash` or a router alias |
| Context | 1M tokens on the official Pro model card | A provider may expose a lower limit |
| Thinking | Provider and serving layer decide the exposed field | Do not assume a universal ST toggle |
| Weights | XiaomiMiMo/MiMo-V2.5-Pro on Hugging Face | MiMo-V2.5 standard or V2-Flash weights |
SILLYTAVERN SETUP
Connect the endpoint before tuning the character
SillyTavern’s official documentation supports Chat Completions and custom OpenAI-compatible endpoints. Work in this order so a provider error does not look like a prompt problem.
- 01
Choose a provider
Use Xiaomi’s API surface or a provider that currently lists `mimo-v2.5-pro`. Check its endpoint, authentication rules, context limit, tool support, and model list.
- 02
Select Chat Completions
In SillyTavern, choose the Chat Completion API type. For a compatible route, enter the provider base URL and API key exactly as supplied.
- 03
Enter the stable ID
Use `mimo-v2.5-pro` when the provider follows Xiaomi’s tag. Some routers use a prefixed slug. Copy the provider’s exact ID instead of guessing.
- 04
Send a small test
Load one short character card and use Test Message. Confirm the response, token accounting, and stop behavior before importing a large lorebook.
The official model card recommends temperature=1.0 and top_p=0.95 for local deployment. Treat those as a reference, not an API or SillyTavern preset guarantee.
ROLEPLAY TUNING
A long context window does not fix a crowded prompt
The model card describes long-horizon coherence. In SillyTavern, the usable context also includes the card, world info, author’s note, examples, chat history, and any reasoning content.
Keep the card local
Put the character’s voice, boundaries, and immediate scene rules in clear sections. Avoid burying the current scene under repeated global instructions.
Measure the budget
A 1M model context is an upper bound. Your provider may cap requests, and a long chat still leaves less room for a fresh reply.
Treat thinking as provider-specific
If the endpoint exposes reasoning, test it separately. Do not assume a hidden reasoning field, visible chain, or token budget works the same across providers.
Change one setting
Keep the character and prompt fixed. Change post-processing, temperature, top_p, or reasoning one at a time, then compare several turns.
TROUBLESHOOTING
Read the error before changing the preset
Most failed first messages fall into a small number of buckets. Use the response and provider logs to choose the next check.
- 01
401 or 403
Recheck the API key, account access, and base URL. A valid model name cannot repair an authentication failure.
- 02
404 or model not found
Ask the provider for its exact model ID. `mimo-v2.5-pro` is the official tag, but a router may require a namespace or may not expose Pro.
- 03
Context or request too large
Reduce lorebook entries, example messages, and history. Confirm the provider’s actual limit instead of relying on Xiaomi’s 1M specification.
- 04
Bad format or ignored rules
Try a less restrictive post-processing option, then test a short card. If a strict endpoint needs one system message or alternating roles, follow the provider’s schema.
- 05
Tools or reasoning fail
Check whether the route supports tool calls and reasoning fields. Xiaomi’s agent examples do not prove that every API route or SillyTavern connection exposes them.
TABBIT TODAY
Use Tabbit for the page around the chat
Tabbit’s current visible model lists do not include MiMo-V2.5-Pro, so it is not a native MiMo client. It is useful when your context lives in a wiki, prompt guide, reference page, screenshot, or file and you want a supported model beside it.
- 1
Install the desktop browser
Download Tabbit for macOS or Windows and open a new tab.
- 2
Choose a listed model
Use the current model picker. Availability changes with product updates, so select a model that the picker actually shows.
- 3
Reference the source
Type `@` to bring an open page, screenshot, or file into the conversation without leaving the source behind.
CONTEXT WORKFLOW
Keep the character reference in view
SillyTavern remains the specialized choice for cards and lorebooks. Tabbit handles the adjacent web research and reference work without asking you to copy every passage.
Read a character wiki beside chat
Open the source in Tabbit’s main view and use the AI sidebar to summarize or extract a scene detail while the page stays visible.
Compare a rewrite in one workspace
Tabbit can show parallel replies from its listed models. The screenshot demonstrates the comparison surface, not a MiMo-specific response.
CLIENT CHOICE
SillyTavern and Tabbit have different jobs
Use the specialized RP frontend for character state. Use Tabbit when a live page or document is the part you need to keep beside the answer.
| Capability | SillyTavern | Tabbit |
|---|---|---|
| Character cards and lorebooks | Core workflow | Not a built-in card stack |
| Provider control | Endpoint, preset, sampling and post-processing | Use the models shown by the product |
| Webpage context | Paste or add a compatible extension | Reference an open tab with `@` |
| Reasoning controls | Depends on the connection and provider schema | Depends on the selected model |
| Best fit | Character-centered RP sessions | Research, source reading, and browser chat |
FAQ
MiMo 2.5 Pro and SillyTavern
What is the official MiMo 2.5 Pro model name?+
Xiaomi’s official pages call it MiMo-V2.5-Pro. For the API, the official release page says to use the model tag `mimo-v2.5-pro`.
Is MiMo-V2.5-Pro the same as MiMo-V2-Flash?+
No. They are separate Xiaomi MiMo model entries. Do not use a Flash router slug when you mean the Pro model.
What context length does the Pro model have?+
The official model page and Hugging Face card state a 1M-token context for MiMo-V2.5-Pro. A provider can expose a smaller request limit.
Does SillyTavern have a MiMo preset?+
This page does not endorse one universal preset. Start with a small card, verify the connection, and tune one variable at a time.
Should I enable thinking in SillyTavern?+
Only when your provider documents a reasoning or thinking field for this model. Xiaomi’s general agent claims do not establish a common SillyTavern switch.
Why does my provider reject the model ID?+
The provider may use a namespace, have retired the route, or expose a different model. Check its current model list and error response.
Does Tabbit currently support MiMo-V2.5-Pro?+
The current visible model lists checked for this page do not include MiMo-V2.5-Pro. Tabbit’s current value here is browser context with the models it actually lists, not a promised MiMo endpoint.
Can Tabbit replace SillyTavern?+
No. SillyTavern remains the better fit for character cards, lorebooks, and RP-specific controls. Tabbit is a companion path for webpages, files, and model comparison.
Keep RP state in SillyTavern, keep sources in reach
Verify `mimo-v2.5-pro` with your provider, test a small character card, and treat thinking and context limits as connection-specific. When the missing piece is a live source page, open it in Tabbit and use a listed model beside it.
Available for macOS and Windows. The model picker and provider availability can change.