Xiaomi MiMo-V2.5-Pro vs o3
Xiaomi MiMo-V2.5-Pro (2026) and o3 (2025) are agentic coding models from Xiaomi and OpenAI. Xiaomi MiMo-V2.5-Pro ships a 1M-token context window, while o3 ships a 128K-token context window. On pricing, Xiaomi MiMo-V2.5-Pro costs $1/1M input tokens versus $1/1M for the alternative. This comparison covers specs, pricing, capabilities, benchmarks, provider availability, and production fit. It focuses on practical selection signals rather than broad model-family marketing.
Xiaomi MiMo-V2.5-Pro fits 8x more tokens; pick it for long-context work and o3 for tighter calls.
Specs
| Released | 2026-04-22 | 2025-03-31 |
| Context window | 1M | 128K |
| Parameters | 1T | — |
| Architecture | mixture of experts | decoder only |
| License | Proprietary | Unknown |
| Knowledge cutoff | - | - |
Pricing and availability
| Xiaomi MiMo-V2.5-Pro | o3 | |
|---|---|---|
| Input price | $1/1M tokens | $1/1M tokens |
| Output price | $3/1M tokens | $4/1M tokens |
| Providers |
Capabilities
| Xiaomi MiMo-V2.5-Pro | o3 | |
|---|---|---|
| Vision | ||
| Multimodal | ||
| Reasoning | ||
| Function calling | ||
| Tool use | ||
| Structured outputs | ||
| Code execution |
Benchmarks
No shared benchmark rows are currently sourced for this pair.
Deep dive
The capability footprint differs most on reasoning mode: o3, function calling: Xiaomi MiMo-V2.5-Pro, tool use: Xiaomi MiMo-V2.5-Pro, and code execution: o3. Both models share structured outputs, so the practical split is not just feature count. Use those differences to decide whether the page is about raw model quality, agentic coding support, multimodal ingestion, or predictable structured API behavior.
For cost, Xiaomi MiMo-V2.5-Pro lists $1/1M input and $3/1M output tokens, while o3 lists $1/1M input and $4/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts Xiaomi MiMo-V2.5-Pro lower by about $0.3 per million blended tokens. Availability is 1 providers versus 3, so concentration risk also matters.
Choose Xiaomi MiMo-V2.5-Pro when coding workflow support and larger context windows are central to the workload. Choose o3 when coding workflow support and broader provider choice are more important. For production, rerun your own prompts through the exact provider, region, and tool stack you plan to ship. This keeps the decision grounded in measurable tradeoffs instead of brand-level assumptions. It also helps separate model capability from provider packaging, which can change cost and latency.
FAQ
Which has a larger context window, Xiaomi MiMo-V2.5-Pro or o3?
Xiaomi MiMo-V2.5-Pro supports 1M tokens, while o3 supports 128K tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Which is cheaper, Xiaomi MiMo-V2.5-Pro or o3?
Xiaomi MiMo-V2.5-Pro is cheaper on tracked token pricing. Xiaomi MiMo-V2.5-Pro costs $1/1M input and $3/1M output tokens. o3 costs $1/1M input and $4/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Xiaomi MiMo-V2.5-Pro or o3 open source?
Xiaomi MiMo-V2.5-Pro is listed under Proprietary. o3 is listed under Unknown. License labels affect whether you can self-host, redistribute weights, or rely only on hosted APIs, so confirm the upstream license before deployment.
Which is better for reasoning mode, Xiaomi MiMo-V2.5-Pro or o3?
o3 has the clearer documented reasoning mode signal in this comparison. If reasoning mode is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for function calling, Xiaomi MiMo-V2.5-Pro or o3?
Xiaomi MiMo-V2.5-Pro has the clearer documented function calling signal in this comparison. If function calling is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Where can I run Xiaomi MiMo-V2.5-Pro and o3?
Xiaomi MiMo-V2.5-Pro is available on OpenRouter. o3 is available on OpenAI API, OpenRouter, and OpenAI Batch API. Provider coverage can affect latency, region availability, compliance posture, and fallback options. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Continue comparing
Last reviewed: 2026-04-24. Data sourced from public model cards and provider documentation.