Question 1

What does this Fugu Ultra vs Grok Build 0.1 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: Fugu Ultra or Grok Build 0.1?

Accepted Answer

Fugu Ultra lists $5.00 input and $30.00 output per 1M tokens. Grok Build 0.1 lists $1.00 input and $2.00 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: Fugu Ultra or Grok Build 0.1?

Accepted Answer

Fugu Ultra lists 1M tokens and Grok Build 0.1 lists 256K. Fugu Ultra therefore has the larger recorded context window, but capacity alone is not a quality score.

Question 4

Which is faster: Fugu Ultra or Grok Build 0.1?

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 Fugu Ultra and Grok Build 0.1 support?

Accepted Answer

Fugu Ultra records text, image input and text output. Grok Build 0.1 records text, image, pdf 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 Fugu Ultra or Grok Build 0.1?

Accepted Answer

Consider Fugu Ultra if you need larger context. Consider Grok Build 0.1 if you need a lower listed input rate or a lower listed output rate. 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	Fugu Ultra	Grok Build 0.1
Provider	Sakana AI	xAI
Listed pricing route	Sakana AI	xAI
Model family	fugu	grok-build
Accepted inputs	text, image	text, image, pdf
Produced outputs	text	text
Context window	1MHigher	256K
Max output	—	256K
Input price / 1M	$5.00	$1.00Lower
Output price / 1M	$30.00	$2.00Lower
Reasoning mode	Documented	Documented
Tool calling	Documented	Documented
Image input	Documented	Documented
Audio input	Not documented	Not documented
Structured output	Documented	Documented
License	Proprietary	Proprietary

Fugu Ultra vs Grok Build 0.1

Fugu Ultra

Grok Build 0.1

Key differences

Pricing, limits and capabilities

Which model should you choose?

Documentation and model profiles

Questions people ask

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