Question 1

What does this Laguna S 2.1 vs Fugu Ultra comparison cover?

Accepted Answer

It brings together documented inputs and outputs, token limits, deployment terms and available pricing. When both models have source-linked, verified results on a shared benchmark, those results are shown with their individual sources. The comparison is a starting point for evaluating your own workload.

Question 2

Which is cheaper: Laguna S 2.1 or Fugu Ultra?

Accepted Answer

Laguna S 2.1 lists $0.10 input and $0.20 output per 1M tokens. Fugu Ultra lists $5.00 input and $30.00 output. The cheaper workload depends on the mix of input and output. Long-context tiers, caching, batch processing and retries can change the bill.

Question 3

Which has the larger context window: Laguna S 2.1 or Fugu Ultra?

Accepted Answer

Laguna S 2.1 lists 1.05M tokens and Fugu Ultra lists 1M. Laguna S 2.1 therefore has the larger recorded context window, but capacity alone is not a quality score.

Question 4

Which is faster: Laguna S 2.1 or Fugu Ultra?

Accepted Answer

There is no matched speed measurement for both models with the same source, host, region and date. Test the same prompts at your expected concurrency and measure time to the first useful response as well as complete task time.

Question 5

What input and output types do Laguna S 2.1 and Fugu Ultra support?

Accepted Answer

Laguna S 2.1 records text input and text output. Fugu Ultra records text, image input and text output. “Not documented” means the current source record is incomplete; it does not prove that a modality is unsupported.

Question 6

Should I choose Laguna S 2.1 or Fugu Ultra?

Accepted Answer

Consider Laguna S 2.1 if you need larger context or a lower listed input rate or a lower listed output rate. Laguna S 2.1 offers downloadable weights; Fugu Ultra is listed as a proprietary model. Compare licence terms and operating costs before choosing a deployment. Test both on the same representative examples and judge the output against your acceptance criteria. Include tool failures, retries and the time to a completed task.

Specification	Laguna S 2.1	Fugu Ultra
Provider	Poolside	Sakana AI
Listed pricing route	Poolside	Sakana AI
Model family	laguna	fugu
Accepted inputs	text	text, image
Produced outputs	text	text
Context window	1.05MHigher	1M
Max output	32.77K	—
Input price / 1M	$0.10Lower	$5.00
Output price / 1M	$0.20Lower	$30.00
Reasoning mode	Documented	Documented
Tool calling	Documented	Documented
Image input	Not documented	Documented
Audio input	Not documented	Not documented
Structured output	Not documented	Documented
License	Open weights	Proprietary

Laguna S 2.1 vs Fugu Ultra

Laguna S 2.1

Fugu Ultra

Key differences

Pricing, limits and capabilities

Which model should you choose?

Documentation and model profiles

Questions people ask

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