Claude Mythos Preview vs MiMo-V2.5-Pro
Claude Mythos Preview (2026) and MiMo-V2.5-Pro (2026) compare a standalone API model against a coding-specialized model. Both ship a 1M-token context window. On SWE-bench Verified, Claude Mythos Preview leads by 15 pts. On pricing, MiMo-V2.5-Pro costs $0.43/1M input tokens versus $25/1M for the alternative. This page treats the result as workflow and deployment fit, not a universal model winner.
Treat this as a product-type comparison: Claude Mythos Preview is standalone API model, while MiMo-V2.5-Pro is coding-specialized model. Choose based on workflow fit before reading any benchmark score or price as decisive.
Decision scorecard
Local evidence first| Signal | Claude Mythos Preview | MiMo-V2.5-Pro |
|---|---|---|
| Product type | Standalone API model | Coding-specialized model |
| Best for | reasoning-heavy apps, multimodal apps, and tool-calling agents | custom coding agents, code generation, and tool loops |
| Decision fit | Coding, RAG, and Agents | Coding, RAG, and Agents |
| Context window | 1M | 1M |
| Cheapest output | $125/1M tokens | $0.87/1M tokens |
| Provider routes | 2 tracked | 3 tracked |
| Shared benchmarks | SWE-bench Verified leader | 2 shared |
Decision tradeoffs
- Claude Mythos Preview holds a shared-benchmark lead on SWE-bench Verified, ahead by 15 points.
- 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.
- MiMo-V2.5-Pro has the larger context window for long prompts, retrieval packs, or transcript analysis.
- MiMo-V2.5-Pro has the lower cheapest tracked output price at $0.87/1M tokens.
- MiMo-V2.5-Pro has broader tracked provider coverage for fallback and route flexibility.
- Local decision data tags MiMo-V2.5-Pro 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.
Claude Mythos Preview
$51,250
Cheapest tracked route/tier: Anthropic
MiMo-V2.5-Pro
$566
Cheapest tracked route/tier: OpenRouter
Estimated monthly gap: $50,685. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- No overlapping tracked provider route is sourced for Claude Mythos Preview and MiMo-V2.5-Pro; plan for SDK, billing, or endpoint changes.
- MiMo-V2.5-Pro is $124/1M 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 MiMo-V2.5-Pro and Claude Mythos Preview; plan for SDK, billing, or endpoint changes.
- Claude Mythos Preview is $124/1M 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 | 2026-05-01 | 2026-04-22 |
| Context window | 1M | 1M |
| Parameters | — | 1T |
| Architecture | Decoder Only | Mixture of Experts |
| License | Proprietary | Proprietary |
| Openness | Proprietary | Proprietary |
| Weights | Not released | Not released |
| Code | Unknown | Unknown |
| Commercial use | Restricted | Restricted |
| Knowledge cutoff | 2025-12 | - |
Pricing and availability
| Pricing attribute | Claude Mythos Preview | MiMo-V2.5-Pro |
|---|---|---|
| Input price | $25/1M tokens | $0.43/1M tokens |
| Output price | $125/1M tokens | $0.87/1M tokens |
| Providers |
Capabilities
| Capability | Claude Mythos Preview | MiMo-V2.5-Pro |
|---|---|---|
| Vision | Yes | No |
| Multimodal | Yes | No |
| Reasoning | Yes | No |
| JSON / Tool use | Yes | Yes |
| Structured outputs | Yes | Yes |
| Code execution | Yes | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
| Benchmark | Claude Mythos Preview | 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 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 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 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, Claude Mythos Preview lists $25/1M input and $125/1M output tokens on the cheapest listed provider, while MiMo-V2.5-Pro lists $0.43/1M input and $0.87/1M output tokens on the cheapest listed provider. A 70/30 input-output blend puts MiMo-V2.5-Pro lower by about $54.43 per million blended tokens. Availability is 2 providers versus 3, so concentration risk also matters.
Choose Claude Mythos Preview when coding workflow support are central to the workload. Choose 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 MiMo-V2.5-Pro?
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 MiMo-V2.5-Pro?
MiMo-V2.5-Pro is cheaper on listed token pricing. Claude Mythos Preview costs $25/1M input and $125/1M output tokens. MiMo-V2.5-Pro costs $0.43/1M input and $0.87/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Claude Mythos Preview or MiMo-V2.5-Pro open source?
Claude Mythos Preview is listed under Proprietary. 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 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 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 MiMo-V2.5-Pro?
Claude Mythos Preview is available on Anthropic and Microsoft Foundry. MiMo-V2.5-Pro is available on OpenRouter, Xiaomi, and Novita AI. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
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Last reviewed: 2026-11-09. Data sourced from public model cards and provider documentation.