LLM Reference

Claude Sonnet 4.5 vs Xiaomi MiMo-V2.5

Claude Sonnet 4.5 (2025) and Xiaomi MiMo-V2.5 (2026) are frontier-tier reasoning models from Anthropic and Xiaomi. Claude Sonnet 4.5 ships a 200k-token context window, while Xiaomi MiMo-V2.5 ships a 1.05m-token context window. On MMLU PRO, Claude Sonnet 4.5 leads by 1.1 pts. 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 fits 5x more tokens; pick it for long-context work and Claude Sonnet 4.5 for tighter calls.

Decision scorecard

Local evidence first
SignalClaude Sonnet 4.5Xiaomi MiMo-V2.5
Best forreasoning-heavy apps, multimodal apps, and tool-calling agentsreasoning-heavy apps, multimodal apps, and tool-calling agents
Decision fitCoding, RAG, and AgentsRAG, Agents, and Long context
Context window200k1.05m
Cheapest output$15/1M tokens$0.28/1M tokens
Provider routes8 tracked2 tracked
Shared benchmarksMMLU PRO leader2 shared

Decision tradeoffs

Choose Claude Sonnet 4.5 when...
  • Claude Sonnet 4.5 holds a shared-benchmark lead on MMLU PRO, ahead by 1.1 points.
  • Claude Sonnet 4.5 has broader tracked provider coverage for fallback and route flexibility.
  • Local decision data tags Claude Sonnet 4.5 for Coding, RAG, and Agents.
Choose Xiaomi MiMo-V2.5 when...
  • Xiaomi MiMo-V2.5 holds a shared-benchmark lead on Google-Proof Q&A, ahead by 0.3 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.

Monthly cost at traffic

Estimate token spend from the cheapest tracked input and output route or tier on this page.

Lower estimate Xiaomi MiMo-V2.5

Claude Sonnet 4.5

$6,150

Cheapest tracked route/tier: Microsoft Foundry

Xiaomi MiMo-V2.5

$182

Cheapest tracked route/tier: OpenRouter

Estimated monthly gap: $5,968. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.

Switch friction

Claude Sonnet 4.5 -> Xiaomi MiMo-V2.5
  • Provider overlap exists on OpenRouter; start route-level A/B tests there.
  • Xiaomi MiMo-V2.5 is $14.72/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
Xiaomi MiMo-V2.5 -> Claude Sonnet 4.5
  • Provider overlap exists on OpenRouter; start route-level A/B tests there.
  • Claude Sonnet 4.5 is $14.72/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.

Specs

Specification
Released2025-09-292026-04-22
Context window200k1.05m
Parameters——
ArchitectureDecoder Only-
LicenseProprietaryProprietary
OpennessProprietaryProprietary
WeightsNot releasedNot released
CodeUnknownUnknown
Commercial useCommercial use: conditionalCommercial use: conditional
Knowledge cutoff2025-12-

Pricing and availability

Pricing attributeClaude Sonnet 4.5Xiaomi MiMo-V2.5
Input price
0-200,001t
$3/1M tokens
200,001t+
$6/1M tokens
$0.14/1M tokens
Output price
0-200,001t
$15/1M tokens
200,001t+
$22.50/1M tokens
$0.28/1M tokens
Providers
Microsoft FoundryAnthropicSnowflake CortexGCP Vertex AIAWS BedrockReplicate API
OpenRouterXiaomi

Capabilities

CapabilityClaude Sonnet 4.5Xiaomi MiMo-V2.5
VisionYesYes
MultimodalYesYes
ReasoningYesYes
JSON / Tool useYesYes
Structured outputsYesYes
Code executionNoNo
IDE integrationNoNo
Computer useNoNo
Parallel agentsNoNo

Benchmarks

BenchmarkClaude Sonnet 4.5Xiaomi MiMo-V2.5
MMLU PRO86.084.9
Google-Proof Q&A83.483.7

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Model pages
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Last reviewed: 2026-07-26. Data sourced from public model cards and provider documentation.