Xiaomi MiMo-V2.5 vs o3
Xiaomi MiMo-V2.5 (2026) and o3 (2025) are frontier-tier reasoning models from Xiaomi and OpenAI. Xiaomi MiMo-V2.5 ships a 1.05m-token context window, while o3 ships a 200k-token context window. On Google-Proof Q&A, o3 leads by 4 pts. On pricing, Xiaomi MiMo-V2.5 costs $0.14/1M input tokens versus $2/1M for the alternative. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
Xiaomi MiMo-V2.5 is ~1329% cheaper at $0.14/1M; pay for o3 only for coding workflow support.
Decision scorecard
Local evidence first| Signal | Xiaomi MiMo-V2.5 | o3 |
|---|---|---|
| Best for | reasoning-heavy apps, multimodal apps, and tool-calling agents | reasoning-heavy apps, multimodal apps, and tool-calling agents |
| Decision fit | RAG, Agents, and Long context | Coding, RAG, and Agents |
| Context window | 1.05m | 200k |
| Cheapest output | $0.28/1M tokens | $8/1M tokens |
| Provider routes | 2 tracked | 3 tracked |
| Shared benchmarks | 2 shared | Google-Proof Q&A leader |
Decision tradeoffs
- Xiaomi MiMo-V2.5 holds a shared-benchmark lead on AIME 2025, ahead by 5.2 points.
- Xiaomi MiMo-V2.5 has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Xiaomi MiMo-V2.5 has the lower cheapest tracked output price at $0.28/1M tokens.
- Local decision data tags Xiaomi MiMo-V2.5 for RAG, Agents, and Long context.
- o3 holds a shared-benchmark lead on Google-Proof Q&A, ahead by 4 points.
- o3 has broader tracked provider coverage for fallback and route flexibility.
- o3 uniquely exposes Code execution in local model data.
- Local decision data tags o3 for Coding, RAG, and Agents.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Xiaomi MiMo-V2.5
$182
Cheapest tracked route/tier: OpenRouter
o3
$3,600
Cheapest tracked route/tier: OpenAI API
Estimated monthly gap: $3,418. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- Provider overlap exists on OpenRouter; start route-level A/B tests there.
- o3 is $7.72/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- o3 adds Code execution in local capability data.
- Provider overlap exists on OpenRouter; start route-level A/B tests there.
- Xiaomi MiMo-V2.5 is $7.72/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Code execution before moving production traffic.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-04-22 | 2025-04-16 |
| Context window | 1.05m | 200k |
| Parameters | — | — |
| Architecture | - | Decoder Only |
| License | Proprietary | Proprietary |
| Openness | Proprietary | Proprietary |
| Weights | Not released | Not released |
| Code | Unknown | Unknown |
| Commercial use | Commercial use: conditional | Commercial use: conditional |
| Knowledge cutoff | - | 2024-06 |
Pricing and availability
| Pricing attribute | Xiaomi MiMo-V2.5 | o3 |
|---|---|---|
| Input price | $0.14/1M tokens | $2/1M tokens |
| Output price | $0.28/1M tokens | $8/1M tokens |
| Providers |
Capabilities
| Capability | Xiaomi MiMo-V2.5 | o3 |
|---|---|---|
| Vision | Yes | Yes |
| Multimodal | Yes | Yes |
| Reasoning | Yes | Yes |
| JSON / Tool use | Yes | Yes |
| Structured outputs | Yes | Yes |
| Code execution | No | Yes |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
| Benchmark | Xiaomi MiMo-V2.5 | o3 |
|---|---|---|
| Google-Proof Q&A | 83.7 | 87.7 |
| AIME 2025 | 94.1 | 88.9 |
Continue comparing
Popular comparisons for Xiaomi MiMo-V2.5
Popular comparisons for o3
Last reviewed: 2026-06-29. Data sourced from public model cards and provider documentation.