Claude Mythos Preview vs Xiaomi MiMo-V2.5-Pro
Claude Mythos Preview (2026) and Xiaomi MiMo-V2.5-Pro (2026) are agentic coding models from Anthropic and Xiaomi. Claude Mythos Preview ships a 1M-token context window, while Xiaomi MiMo-V2.5-Pro ships a 1M-token context window. On SWE-bench Verified, Claude Mythos Preview leads by 15 pts. On pricing, Xiaomi MiMo-V2.5-Pro costs $1/1M input tokens versus $25/1M for the alternative. This comparison covers specs, pricing, capabilities, benchmarks, provider availability, and production fit.
Xiaomi MiMo-V2.5-Pro is ~2400% cheaper at $1/1M; pay for Claude Mythos Preview only for coding workflow support.
Decision scorecard
Local evidence first| Signal | Claude Mythos Preview | Xiaomi MiMo-V2.5-Pro |
|---|---|---|
| Decision fit | Coding, RAG, and Agents | Coding, RAG, and Agents |
| Context window | 1M | 1M |
| Cheapest output | $125/1M tokens | $3/1M tokens |
| Provider routes | 2 tracked | 1 tracked |
| Shared benchmarks | SWE-bench Verified leader | 2 rows |
Decision tradeoffs
- Claude Mythos Preview leads the largest shared benchmark signal on SWE-bench Verified by 15 points.
- Claude Mythos Preview has broader tracked provider coverage for fallback and procurement flexibility.
- Claude Mythos Preview uniquely exposes Vision, Multimodal, and Reasoning in local model data.
- Local decision data tags Claude Mythos Preview for Coding, RAG, and Agents.
- Xiaomi MiMo-V2.5-Pro has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Xiaomi MiMo-V2.5-Pro has the lower cheapest tracked output price at $3/1M tokens.
- Local decision data tags Xiaomi MiMo-V2.5-Pro for Coding, RAG, and Agents.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output prices on this page.
Claude Mythos Preview
$51,250
Cheapest tracked route: Anthropic
Xiaomi MiMo-V2.5-Pro
$1,550
Cheapest tracked route: OpenRouter
Estimated monthly gap: $49,700. Batch, cache, and negotiated pricing are excluded from this local estimate.
Switch friction
- No overlapping tracked provider route is sourced for Claude Mythos Preview and Xiaomi MiMo-V2.5-Pro; plan for SDK, billing, or endpoint changes.
- Xiaomi MiMo-V2.5-Pro is $122/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Vision, Multimodal, and Reasoning before moving production traffic.
- No overlapping tracked provider route is sourced for Xiaomi MiMo-V2.5-Pro and Claude Mythos Preview; plan for SDK, billing, or endpoint changes.
- Claude Mythos Preview is $122/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Claude Mythos Preview adds Vision, Multimodal, and Reasoning in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-04-07 | 2026-04-22 |
| Context window | 1M | 1M |
| Parameters | — | 1T |
| Architecture | decoder only | mixture of experts |
| License | Proprietary | Proprietary |
| Knowledge cutoff | 2025-12 | - |
Pricing and availability
| Pricing attribute | Claude Mythos Preview | Xiaomi MiMo-V2.5-Pro |
|---|---|---|
| Input price | $25/1M tokens | $1/1M tokens |
| Output price | $125/1M tokens | $3/1M tokens |
| Providers |
Capabilities
| Capability | Claude Mythos Preview | Xiaomi MiMo-V2.5-Pro |
|---|---|---|
| Vision | Yes | No |
| Multimodal | Yes | No |
| Reasoning | Yes | No |
| Function calling | Yes | Yes |
| Tool use | Yes | Yes |
| Structured outputs | Yes | Yes |
| Code execution | Yes | No |
Benchmarks
| Benchmark | Claude Mythos Preview | Xiaomi MiMo-V2.5-Pro |
|---|---|---|
| SWE-bench Verified | 93.9 | 78.9 |
| Google-Proof Q&A | 94.6 | 66.7 |
Deep dive
On shared benchmark coverage, SWE-bench Verified has Claude Mythos Preview at 93.9 and Xiaomi MiMo-V2.5-Pro at 78.9, with Claude Mythos Preview ahead by 15 points; Google-Proof Q&A has Claude Mythos Preview at 94.6 and Xiaomi MiMo-V2.5-Pro at 66.7, with Claude Mythos Preview ahead by 27.9 points. The largest visible gap is 27.9 points on Google-Proof Q&A, 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: Claude Mythos Preview, multimodal input: Claude Mythos Preview, reasoning mode: Claude Mythos Preview, and code execution: Claude Mythos Preview. Both models share function calling, 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, Claude Mythos Preview lists $25/1M input and $125/1M output tokens, while Xiaomi MiMo-V2.5-Pro lists $1/1M input and $3/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts Xiaomi MiMo-V2.5-Pro lower by about $53.40 per million blended tokens. Availability is 2 providers versus 1, so concentration risk also matters.
Choose Claude Mythos Preview when coding workflow support and broader provider choice are central to the workload. Choose Xiaomi MiMo-V2.5-Pro when coding workflow support, larger context windows, and lower input-token cost 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, Claude Mythos Preview or Xiaomi MiMo-V2.5-Pro?
Xiaomi MiMo-V2.5-Pro supports 1M tokens, while Claude Mythos Preview supports 1M tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Which is cheaper, Claude Mythos Preview or Xiaomi MiMo-V2.5-Pro?
Xiaomi MiMo-V2.5-Pro is cheaper on tracked token pricing. Claude Mythos Preview costs $25/1M input and $125/1M output tokens. Xiaomi MiMo-V2.5-Pro costs $1/1M input and $3/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Claude Mythos Preview or Xiaomi MiMo-V2.5-Pro open source?
Claude Mythos Preview is listed under Proprietary. Xiaomi MiMo-V2.5-Pro is listed under Proprietary. 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, Claude Mythos Preview or Xiaomi MiMo-V2.5-Pro?
Claude Mythos Preview 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.
Which is better for multimodal input, Claude Mythos Preview or Xiaomi MiMo-V2.5-Pro?
Claude Mythos Preview 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 Claude Mythos Preview and Xiaomi MiMo-V2.5-Pro?
Claude Mythos Preview is available on Anthropic and Microsoft Foundry. Xiaomi MiMo-V2.5-Pro is available on OpenRouter. 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.
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Last reviewed: 2026-05-16. Data sourced from public model cards and provider documentation.