Head-to-head comparison
Laguna S 2.1 (Poolside) and MiMo-V2.5 (Xiaomi) compared on the ModelCap Index, API price, context window, provider availability, weight access and every public benchmark board they share. Figures are the same ones shown on the live rankings; nothing here is a hidden score.
Snapshot as of 9 September 2026
As of 9 September 2026, MiMo-V2.5 holds the stronger ModelCap Index position (#37 vs #40); Laguna S 2.1 is 1.6× cheaper per output token ($0.18/1M vs $0.28/1M); and MiMo-V2.5 ships open weights.
Evidence: 5 reported rows against measured corpus ladders (67%); global-corpus-prior over 182 held-out anchors (33%); shrunk 4.8 toward the measured corpus · 2 public benchmark observations across 2 boards. Prices are the lowest listed API offer per million tokens observed on the OpenRouter catalogue.
Scores are the sources' own published figures for each model's best evaluated configuration; ModelCap never re-runs a benchmark.
Want a different pairing? Open the interactive comparison tool to swap either model for any current ranked language model.
MiMo-V2.5 ranks higher on the ModelCap Index as of 9 September 2026: #37 against #40. That is a capability ranking built from public benchmark evidence with published uncertainty; whether it is "better" for you also depends on price, context and where you can run it. Their published uncertainty intervals overlap, so the rank difference alone does not establish a reliable capability advantage for your workload.
Laguna S 2.1 is cheaper on output tokens: $0.18/1M against $0.28/1M. Input tokens are $0.09/1M for Laguna S 2.1 and $0.14/1M for MiMo-V2.5. Prices are the lowest listed API offer ModelCap observed, in USD per million tokens. For 1,000 requests with 2,000 input and 500 output tokens each (2M input + 0.5M output), the listed-rate estimate is $0.27 for Laguna S 2.1 versus $0.42 for MiMo-V2.5. Laguna S 2.1 costs 35.7% less in this scenario. This excludes caching, batch discounts, prompt-length tiers, tool charges and retries; verify the selected endpoint before budgeting.
Both publish a 1M-token context window.
The two models do not share a coding benchmark board on ModelCap yet, so no head-to-head coding score is published; the ModelCap Index position is the closest overall signal.
Laguna S 2.1: Restricted license. MiMo-V2.5: Open weights. Open weights mean the checkpoint can be downloaded and self-hosted under its licence; API-only models are available solely through hosted endpoints.
ModelCap currently lists 1 API provider for Laguna S 2.1 and 5 for MiMo-V2.5, from the OpenRouter catalogue snapshot the site serves; each model page lists the providers and their prices.
Every figure comes from the sealed ModelCap dataset published 9 September 2026; the page re-renders within a minute of each data refresh, and the ModelCap Index positions are the same ones shown on the live rankings.