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Head-to-head comparison

Sonar vs Laguna XS 2.1

Sonar (Perplexity) and Laguna XS 2.1 (Poolside) 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 18 August 2026

As of 18 August 2026, Sonar holds the stronger ModelCap Index position (#196 vs #205); Laguna XS 2.1 is 8.3× cheaper per output token ($0.12/1M vs $1.00/1M); and Laguna XS 2.1 offers the longer context window (262K vs 127K tokens).

Which should you choose?

Choose Sonar if…

  • you want the stronger overall ModelCap Index position — #196 against #205 (9.6 vs 4.7 points).

Choose Laguna XS 2.1 if…

  • API cost matters — $0.12/1M output tokens against $1.00/1M, about 8.3× cheaper.
  • your workload is prompt-heavy — input tokens cost $0.06/1M against $1.00/1M.
  • you need the longer context window — 262K tokens against 127K.
  • you want the more recently listed model — Laguna XS 2.1 was listed 2 July 2026, Sonar 27 January 2025.

Sonar vs Laguna XS 2.1: specs, pricing and context

Specification comparison of Sonar and Laguna XS 2.1
FieldSonarPerplexityLaguna XS 2.1Poolside
ModelCap Index position#196#205
Index score9.64.7
EvidenceMeasuredEstimated
Input price / 1M tokens$1.00$0.06
Output price / 1M tokens$1.00$0.12
Context window127K tokens262K tokens
Max output tokens—33K
API providers listed11
Weight accessAPI onlyRestricted license
Input modalitiesText, ImageText
First listed27 January 20252 July 2026
PublisherPerplexityPoolside

Evidence: 1 public benchmark observation across 1 board · placed against measured peers on publisher-reported benchmarks, discounted for self-report optimism. Prices are the lowest listed API offer per million tokens observed on the OpenRouter catalogue.

Benchmark scores: Sonar vs Laguna XS 2.1

Public benchmark boards where Sonar or Laguna XS 2.1 has a published result
BoardSonarLaguna XS 2.1Leads
Artificial Analysis Intelligence IndexArtificial Analysis9.4intelligence-index—Only one result

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.

Sonar vs Laguna XS 2.1: common questions

Is Sonar better than Laguna XS 2.1?

Sonar ranks higher on the ModelCap Index as of 18 August 2026: #196 against #205. 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.

Is Sonar cheaper than Laguna XS 2.1?

Laguna XS 2.1 is cheaper on output tokens: $0.12/1M against $1.00/1M. Input tokens are $1.00/1M for Sonar and $0.06/1M for Laguna XS 2.1. Prices are the lowest listed API offer ModelCap observed, in USD per million tokens.

Which has the bigger context window, Sonar or Laguna XS 2.1?

Laguna XS 2.1 has the larger context window: 262K tokens against 127K.

Which is better for coding, Sonar or Laguna XS 2.1?

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.

Are Sonar and Laguna XS 2.1 open-weight models?

Sonar: API only. Laguna XS 2.1: Restricted license. Open weights mean the checkpoint can be downloaded and self-hosted under its licence; API-only models are available solely through hosted endpoints.

Where can I run Sonar and Laguna XS 2.1?

ModelCap currently lists 1 API provider for Sonar and 1 for Laguna XS 2.1, from the OpenRouter catalogue snapshot the site serves; each model page lists the providers and their prices.

How current is this Sonar vs Laguna XS 2.1 comparison?

Every figure comes from the sealed ModelCap dataset published 18 August 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.

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