MiMo-V2.5 vs Mistral Small 3
MiMo-V2.5 (2026) and Mistral Small 3 (2025) are frontier reasoning models from Xiaomi and MistralAI. MiMo-V2.5 ships a 1M-token context window, while Mistral Small 3 ships a 32K-token context window. On LMArena Text Arena - Creative Writing, MiMo-V2.5 leads by 199 pts. On pricing, Mistral Small 3 costs $0.10/1M input tokens versus $0.14/1M 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.
Mistral Small 3 is ~40% cheaper at $0.10/1M; pay for MiMo-V2.5 only for reasoning depth.
Decision scorecard
Local evidence first| Signal | MiMo-V2.5 | Mistral Small 3 |
|---|---|---|
| Best for | reasoning-heavy apps, multimodal apps, and tool-calling agents | tool-calling agents and provider-routed production |
| Decision fit | RAG, Agents, and Long context | Agents, Classification, and JSON / Tool use |
| Context window | 1M | 32K |
| Cheapest output | $0.28/1M tokens | $0.30/1M tokens |
| Provider routes | 2 tracked | 3 tracked |
| Shared benchmarks | LMArena Text Arena - Creative Writing leader | 1 shared |
Decision tradeoffs
- MiMo-V2.5 holds a shared-benchmark lead on LMArena Text Arena - Creative Writing, ahead by 199 points.
- MiMo-V2.5 has the larger context window for long prompts, retrieval packs, or transcript analysis.
- MiMo-V2.5 has the lower cheapest tracked output price at $0.28/1M tokens.
- MiMo-V2.5 uniquely exposes Vision, Multimodal, and Reasoning in local model data.
- Local decision data tags MiMo-V2.5 for RAG, Agents, and Long context.
- Mistral Small 3 has broader tracked provider coverage for fallback and route flexibility.
- Local decision data tags Mistral Small 3 for Agents, Classification, and JSON / Tool use.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
MiMo-V2.5
$182
Cheapest tracked route/tier: OpenRouter
Mistral Small 3
$155
Cheapest tracked route/tier: Together AI
Estimated monthly gap: $27.00. 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.
- Mistral Small 3 is $0.02/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Check replacement coverage for Vision, Multimodal, and Reasoning before moving production traffic.
- Provider overlap exists on OpenRouter; start route-level A/B tests there.
- MiMo-V2.5 is $0.02/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- MiMo-V2.5 adds Vision, Multimodal, and Reasoning in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-04-22 | 2025-01-30 |
| Context window | 1M | 32K |
| Parameters | — | 24B |
| Architecture | - | Decoder Only |
| License | Proprietary | Apache 2.0OSI-approved |
| Openness | Proprietary | Open source |
| Weights | Not released | Unknown |
| Code | Unknown | Unknown |
| Commercial use | Restricted | Permitted |
| Knowledge cutoff | - | 2023-10 |
Pricing and availability
| Pricing attribute | MiMo-V2.5 | Mistral Small 3 |
|---|---|---|
| Input price | $0.14/1M tokens | $0.10/1M tokens |
| Output price | $0.28/1M tokens | $0.30/1M tokens |
| Providers |
Capabilities
| Capability | MiMo-V2.5 | Mistral Small 3 |
|---|---|---|
| Vision | Yes | No |
| Multimodal | Yes | No |
| Reasoning | Yes | No |
| JSON / Tool use | Yes | Yes |
| Structured outputs | Yes | Yes |
| Code execution | No | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
| Benchmark | MiMo-V2.5 | Mistral Small 3 |
|---|---|---|
| LMArena Text Arena - Creative Writing | 1393.0 | 1194.0 |
Deep dive
On shared benchmark coverage, LMArena Text Arena - Creative Writing has MiMo-V2.5 at 1393 and Mistral Small 3 at 1194, with MiMo-V2.5 ahead by 199 points. The largest visible gap is 199 points on LMArena Text Arena - Creative Writing, which matters most when that benchmark mirrors your workload. Treat isolated benchmark wins as directional, because provider routing, prompt style, and tool access can move real application results.
The capability footprint differs most on vision: MiMo-V2.5, multimodal input: MiMo-V2.5, and reasoning mode: MiMo-V2.5. Both models share JSON / Tool use, and 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, MiMo-V2.5 lists $0.14/1M input and $0.28/1M output tokens on the cheapest listed provider, while Mistral Small 3 lists $0.10/1M input and $0.30/1M output tokens on the cheapest listed provider. A 70/30 input-output blend puts Mistral Small 3 lower by about $0.02 per million blended tokens. Availability is 2 providers versus 3, so concentration risk also matters.
Choose MiMo-V2.5 when reasoning depth and larger context windows are central to the workload. Choose Mistral Small 3 when provider fit, lower input-token cost, 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.
FAQ
Which has a larger context window, MiMo-V2.5 or Mistral Small 3?
MiMo-V2.5 supports 1M tokens, while Mistral Small 3 supports 32K tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Which is cheaper, MiMo-V2.5 or Mistral Small 3?
Mistral Small 3 is cheaper on listed token pricing. MiMo-V2.5 costs $0.14/1M input and $0.28/1M output tokens. Mistral Small 3 costs $0.10/1M input and $0.30/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is MiMo-V2.5 or Mistral Small 3 open source?
MiMo-V2.5 is listed under Proprietary. Mistral Small 3 is listed under Apache 2.0. 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 vision, MiMo-V2.5 or Mistral Small 3?
MiMo-V2.5 has the clearer documented vision signal in this comparison. If vision is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Which is better for multimodal input, MiMo-V2.5 or Mistral Small 3?
MiMo-V2.5 has the clearer documented multimodal input signal in this comparison. If multimodal input is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Where can I run MiMo-V2.5 and Mistral Small 3?
MiMo-V2.5 is available on OpenRouter and Xiaomi. Mistral Small 3 is available on Together AI, OpenRouter, and Vercel AI Gateway. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
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Last reviewed: 2026-10-29. Data sourced from public model cards and provider documentation.