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Comparison · 2 models · Updated Oct 4, 2026

Seed 2.1 Pro vs Laguna XS 2.1

Laguna XS 2.1 comes out ahead, 68 to 50 on our weighted score, and it is the cheaper option too.

  1. ByteDance Seed

    Seed 2.1 Pro

    Released Jun 23, 2026

    50/100
    • ECI—
    • Price$0.891 / $4.45
    • Context256K
    Full specs Remove Seed 2.1 Pro
  2. Our pick

    Poolside

    Laguna XS 2.1

    Released Jul 2, 2026

    68/100
    • ECI—
    • Price$0.06 / $0.12
    • Context262K
    Full specs Remove Laguna XS 2.1

  3. Add a model

    Make it a three-way comparison.

01 — Verdict

Laguna XS 2.1 is our pick

Laguna XS 2.1 is the better all-round choice, scoring 68/100 against Seed 2.1 Pro (50). It leads on price. Seed 2.1 Pro wins on inputs & features. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.

  • CapabilityNot enough dataNo independent benchmark covers every model here yet
  • Lowest priceLaguna XS 2.1Laguna XS 2.1 $0.075 · Seed 2.1 Pro $1.78 per 1M tokens (3:1 blend)
  • Longest contextLaguna XS 2.1Laguna XS 2.1 262,144 · Seed 2.1 Pro 256,000 tokens
  • Widest inputsSeed 2.1 ProSeed 2.1 Pro: Text, Images, Video · Laguna XS 2.1: Text
  • Self-hostingLaguna XS 2.1Publishes downloadable weights
How the score is built
MeasureWeightSeed 2.1 ProLaguna XS 2.1
Price50%38100
Inputs & features30%8035
Context window20%3637
Overall100%50/10068/100

Left out because at least one model lacks the data: capability. The remaining weights were rescaled.

02 — Side by side

Every spec in one table

Highlighted cells lead their row. Dashes mean the data is not published.

Seed 2.1 Pro vs Laguna XS 2.1 specifications side by side
SpecificationSeed 2.1 ProByteDance SeedLaguna XS 2.1Poolside
Capability
Capabilities Index (ECI)——
ECI rank——
Price per million tokens
Input$0.891$0.06 (best)
Output$4.45$0.12 (best)
Cached input$0.178—
Blended (3:1)$1.78$0.075 (best)
Long-context rateSame rateSame rate
Price sourceOfficial Volcengine Ark APIMedian of 1 providers
Limits
Context window256,000 tokens262,144 tokens (best)
Max output256,000 tokens (best)32,768 tokens
Inputs and features
TextYesYes
ImagesYesNo
PDFsNoNo
AudioNoNo
VideoYesNo
ReasoningYesminimal · low · medium · high · xhigh · maxYes
Tool callingYesYes
Structured outputYesNo
Availability
WeightsProprietaryOpen
API model IDdoubao-seed-2-1-pro-260628poolside/laguna-xs-2.1
API providers24 (best)
ReleasedJun 23, 2026Jul 2, 2026
Knowledge cutoff——
03 — Cost

What would a month cost?

Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.

  • Seed 2.1 Pro$17.81
  • Laguna XS 2.1$0.84
04 — Questions

Which should you choose?

Which is better: Seed 2.1 Pro or Laguna XS 2.1?

Laguna XS 2.1 is the better all-round choice, scoring 68/100 against Seed 2.1 Pro (50). It leads on price. Seed 2.1 Pro wins on inputs & features. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.

Which is cheaper, Seed 2.1 Pro or Laguna XS 2.1?

Laguna XS 2.1 is cheaper at $0.06 input / $0.12 output per million tokens (median across 1 API provider; free on Poolside). Seed 2.1 Pro costs $0.891 input / $4.45 output per million tokens (official Volcengine Ark API price). At a typical mix of three input tokens to one output token, that is $0.075 per million tokens for Laguna XS 2.1 versus $1.78 for Seed 2.1 Pro (24× as much).

Which scores higher on benchmarks?

There is no independent benchmark that covers both models yet. Seed 2.1 Pro has not been scored yet and Laguna XS 2.1 has not been scored yet.

Which is better for coding?

There are no published SWE-bench Verified results for Seed 2.1 Pro and Laguna XS 2.1 yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. Both support tool calling for agent workflows.

Which has the bigger context window?

Laguna XS 2.1 has the largest context window at 262,144 tokens, against 256,000 for Seed 2.1 Pro. Maximum output per response: Seed 2.1 Pro up to 256,000, Laguna XS 2.1 up to 32,768 tokens.

Which can read images, PDFs, audio or video?

Seed 2.1 Pro accepts text, images and video; Laguna XS 2.1 accepts text. Seed 2.1 Pro handles the widest range of inputs.

Are any of these open source?

Laguna XS 2.1 publishes its weights and can be self-hosted; Seed 2.1 Pro is proprietary.

Which is newer?

Laguna XS 2.1 is the newest, released Jul 2, 2026. Seed 2.1 Pro came out Jun 23, 2026.

How do you decide the winner?

Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Oct 4, 2026.

05 — Keep comparing

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