Official identity
MiMo-V2.5-Pro is Xiaomi MiMo’s open-source Pro model. Xiaomi lists April 27, 2026, 1.02T total parameters, 42B active parameters, and a 1M-token context window.
English
ROLEPLAY FIELD NOTES
MiMo 2.5 Pro roleplay, tested as a workflow
The useful question is not whether MiMo-V2.5-Pro sounds impressive. It is whether a fixed character card, a live scene, and a provider route stay stable for several turns. This guide gives you a small setup you can repeat.
Xiaomi publishes a 1M-token context and the API tag `mimo-v2.5-pro`. Current Tabbit model lists checked for this page do not include MiMo-V2.5-Pro.
WHAT THE EVIDENCE SAYS
Separate a model claim from an RP experience
Xiaomi describes agentic work, software engineering, and long-horizon coherence. Search snippets and community posts add questions about prose, initiative, consistency, and cost. None of those posts is a controlled roleplay benchmark.
What users ask
SillyTavern discussions mention prose quality, character consistency, model comparisons, and whether Pro feels different from standard V2.5. Treat these as reported experiences, not universal results.
The practical risk
A provider can change the model ID, context cap, reasoning field, prompt format, or sampling defaults. A good RP preset on one route can fail on another.
| Layer | Known here | Do not infer |
|---|---|---|
| Model | `mimo-v2.5-pro` | A Flash alias is not the Pro model. |
| Context | 1M on Xiaomi’s Pro page | Your API route may expose less. |
| Thinking | Serving layer decides fields | No universal SillyTavern toggle is guaranteed. |
| RP quality | Needs your own fixed-turn test | Coding benchmarks do not measure character voice. |
THE RP CONTROL PANEL
Five levers shape the next reply
When a character drifts, changing everything at once hides the cause. Keep the card and opening scene fixed, then inspect one lever at a time.
Character consistency
Give the card a short voice block, specific prohibitions, and two concrete memories. Refer back to the current scene instead of repeating the whole biography.
Initiative
Ask for one bounded action and a visible consequence. State what the character may decide and what must remain with the user. This reduces both passivity and unwanted control.
Style and repetition
Watch sentence openings, stock gestures, repeated metaphors, and the same emotional beat. Compare several replies before raising repetition penalties.
Long context
Count card, examples, lorebook entries, author note, history, reasoning, and reply budget together. A 1M headline is not the request limit of every provider.
Thinking
If a route exposes reasoning, run paired turns with it on and off. More internal tokens can help planning, but they can also alter latency, visible format, and reply length.
A SMALL TEMPLATE
Start with a scene, not a giant system prompt
Use this as a test scaffold. Replace the brackets, keep the first scene identical across providers, and avoid copying community prompts that make safety claims you cannot verify.
RoleWorldCurrent sceneTurn contract
[Role]
Name: {{character_name}}
Voice: {{three concrete voice traits}}
Boundaries: The user controls {{user_character}}. Never decide their private thoughts or actions.
[World]
Place: {{location}}
Known facts: {{two facts that matter now}}
[Current scene]
Time: {{time}}
Immediate tension: {{open question}}
[Turn contract]
Write one scene beat. Let {{character_name}} take one plausible action, then leave a clear opening for the user. Keep details consistent with the card. Do not repeat the same gesture or sentence shape.The template is a test instrument, not an official Xiaomi prompt. Keep the instruction visible in your own notes so you can compare edits.
PROVIDER LAB
The route is part of the model experience
Record the connection details with every sample. SillyTavern supports custom OpenAI-compatible endpoints, manual IDs when `/v1/models` is missing, Test Message, and prompt post-processing modes. For troubleshooting, check the key and base URL on 401 or 403, the exact model ID on 404, context size on request errors, and post-processing on format errors.
| Check | Record | Why it matters |
|---|---|---|
| ID | `mimo-v2.5-pro` or provider namespace | Copy the exact current ID. A 404 means route discovery first. |
| Context | Provider request limit | Log the cap, not only Xiaomi’s 1M specification. |
| Reasoning | Enabled field, effort, or none | Save whether reasoning was returned as a separate field. |
| Formatting | None, merge, semi-strict, strict | A route may require one system message or alternating roles. |
| Sampling | temperature, top_p, repetition controls | Keep defaults in the record before changing one value. |
| Latency | Time to first token and total time | Thinking and provider load can change perceived RP pacing. |
REPRODUCIBLE RP TEST
Use the same five-turn script every time
Community impressions help you choose what to inspect. A fixed script tells you whether a change actually helped your character.
- 01
Freeze the inputs
Save the character card, template, first user message, provider, model ID, context cap, sampler, and thinking state.
- 02
Run the scene
Send five turns: a greeting, a remembered fact, a new constraint, a chance for initiative, and a correction. Do not edit mid-run.
- 03
Score the output
Use 0 to 2 for voice, fact recall, user agency, forward motion, style variety, and format compliance. Write one quote or turn number for each score.
- 04
Change one variable
Test a second run with only one difference. Compare the same rubric and note latency, truncation, refusal, or repetition.
- 05
Keep a failure log
Classify the failure as card, prompt, provider, context, sampler, or safety behavior. This prevents a provider error from becoming a folklore preset.
TABBIT AS THE SOURCE DESK
Keep the character reference beside the chat
Tabbit is not a native MiMo-V2.5-Pro client according to the current visible model lists checked for this page. Its useful role is adjacent: collect source material, inspect a provider page, and compare supported models without losing the page you were reading.
- 1
Open the reference
Keep a character wiki, setting note, provider document, or screenshot in a Tabbit tab.
- 2
Use a listed model
Choose a model the current picker actually shows. Availability can change with product updates.
- 3
Reference with @
Type `@` to bring an open page or file into the conversation. Use the result as a research note, then run RP in your specialised client.
FAQ
MiMo 2.5 Pro roleplay questions
What is the official model ID?+
Xiaomi publishes MiMo-V2.5-Pro and says to use the API tag `mimo-v2.5-pro`. A provider can add a namespace, so copy its current model list when configuring a client.
Does a 1M context guarantee long roleplay memory?+
No. It is the official Pro context specification. Your provider may cap requests, and the card, lorebook, history, reasoning, and reply all share the request budget.
Should I enable thinking for roleplay?+
Only when the provider documents the field for this route. Compare matched turns with thinking on and off because it can change latency, format, and response length.
How do I reduce repetitive prose?+
First freeze the card and inspect repeated instructions, examples, and history. Then change one sampler or post-processing value and compare several turns. A single reply is weak evidence.
How do I test initiative without losing user agency?+
Give the character one bounded decision and state that the user owns their private actions. Score whether the reply creates a next move without deciding for the user.
Is there a universal MiMo roleplay preset?+
No universal preset is established by the sources checked here. Provider defaults, prompt format, reasoning fields, and context caps differ.
Does Tabbit support MiMo-V2.5-Pro?+
The current visible Tabbit model lists checked for this page do not include MiMo-V2.5-Pro. This page does not promise a native endpoint. Tabbit can still hold reference pages beside a model it currently lists.
Is this page a jailbreak guide?+
No. It focuses on reproducible writing tests, provider behavior, user agency, and ordinary safety boundaries. User reports that mention uncensored or jailbreak variants are not treated as instructions or quality evidence.
Give MiMo a fair RP test
Fix the card, scene, provider details, and rubric before you tune. Keep research pages close in Tabbit, then choose the model route that your client actually exposes.
Available for macOS and Windows. Model availability and provider settings can change.