Question 1

What does this Fugu Ultra vs Grok 4.20 (Non-Reasoning) 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 4.20 (Non-Reasoning)?

Accepted Answer

Fugu Ultra lists $5.00 input and $30.00 output per 1M tokens. Grok 4.20 (Non-Reasoning) lists $1.25 input and $2.50 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 4.20 (Non-Reasoning)?

Accepted Answer

Both records list a 1M-token context window. An equal limit does not imply equal recall, instruction following, or long-context quality.

Question 4

Which is faster: Fugu Ultra or Grok 4.20 (Non-Reasoning)?

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 4.20 (Non-Reasoning) support?

Accepted Answer

Fugu Ultra records text, image input and text output. Grok 4.20 (Non-Reasoning) 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 4.20 (Non-Reasoning)?

Accepted Answer

Consider Grok 4.20 (Non-Reasoning) 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 4.20 (Non-Reasoning)
Provider	Sakana AI	xAI
Listed pricing route	Sakana AI	xAI
Model family	fugu	grok
Accepted inputs	text, image	text, image, pdf
Produced outputs	text	text
Context window	1M	1M
Max output	—	30K
Input price / 1M	$5.00	$1.25Lower
Output price / 1M	$30.00	$2.50Lower
Reasoning mode	Documented	Not 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 4.20 (Non-Reasoning)

Fugu Ultra

Grok 4.20 (Non-Reasoning)

Key differences

Pricing, limits and capabilities

Which model should you choose?

Documentation and model profiles

Questions people ask

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