Grok 4 vs Xiaomi MiMo-V2.5-TTS-Series
Grok 4 (2025) and Xiaomi MiMo-V2.5-TTS-Series (2026) are frontier reasoning models from xAI and Xiaomi. Grok 4 ships a 256k-token context window, while Xiaomi MiMo-V2.5-TTS-Series ships a not-yet-sourced context window. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads. It focuses on practical selection signals rather than broad model-family marketing.
Xiaomi MiMo-V2.5-TTS-Series is safer overall; choose Grok 4 when coding workflow support matters.
Decision scorecard
Local evidence first| Signal | Grok 4 | Xiaomi MiMo-V2.5-TTS-Series |
|---|---|---|
| Best for | reasoning-heavy apps, multimodal apps, and tool-calling agents | multimodal apps |
| Decision fit | Coding, RAG, and Agents | Vision |
| Context window | 256k | — |
| Cheapest output | $2.50/1M tokens | - |
| Provider routes | 4 tracked | 1 tracked |
| Shared benchmarks | 0 shared | 0 shared |
Decision tradeoffs
- Grok 4 has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Grok 4 has broader tracked provider coverage for fallback and route flexibility.
- Grok 4 uniquely exposes Vision, Reasoning, and JSON / Tool use in local model data.
- Local decision data tags Grok 4 for Coding, RAG, and Agents.
- Local decision data tags Xiaomi MiMo-V2.5-TTS-Series for Vision.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Grok 4
$1,625
Cheapest tracked route/tier: xAI Console
Xiaomi MiMo-V2.5-TTS-Series
Unavailable
No complete token price in local provider data
Cost delta unavailable until both models have sourced input and output token prices.
Switch friction
- No overlapping tracked provider route is sourced for Grok 4 and Xiaomi MiMo-V2.5-TTS-Series; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Vision, Reasoning, and JSON / Tool use before moving production traffic.
- No overlapping tracked provider route is sourced for Xiaomi MiMo-V2.5-TTS-Series and Grok 4; plan for SDK, billing, or endpoint changes.
- Grok 4 adds Vision, Reasoning, and JSON / Tool use in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-07-09 | 2026-04-23 |
| Context window | 256k | — |
| 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 | - | - |
Pricing and availability
| Pricing attribute | Grok 4 | Xiaomi MiMo-V2.5-TTS-Series |
|---|---|---|
| Input price | $1.25/1M tokens | - |
| Output price | $2.50/1M tokens | - |
| Providers |
Capabilities
| Capability | Grok 4 | Xiaomi MiMo-V2.5-TTS-Series |
|---|---|---|
| Vision | Yes | No |
| Multimodal | Yes | Yes |
| Reasoning | Yes | No |
| JSON / Tool use | Yes | No |
| Structured outputs | Yes | No |
| Code execution | Yes | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
No shared benchmark scores are currently available for this pair.
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Last reviewed: 2026-07-10. Data sourced from public model cards and provider documentation.