Question 1

What does this Fugu vs Grok 4.5 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 or Grok 4.5?

Accepted Answer

The available pricing does not establish a comparable input and output token rate for both models. Check the billing unit and selected host in each profile. Images, speech, video and local inference can have different cost structures.

Question 3

Which has the larger context window: Fugu or Grok 4.5?

Accepted Answer

Fugu lists 1M tokens and Grok 4.5 lists 500K. Fugu therefore has the larger recorded context window, but capacity alone is not a quality score.

Question 4

Which is faster: Fugu or Grok 4.5?

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 and Grok 4.5 support?

Accepted Answer

Fugu records text, image input and text output. Grok 4.5 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 Fugu or Grok 4.5?

Accepted Answer

Consider Fugu if you need larger context. 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	Grok 4.5
Provider	Sakana AI	xAI
Listed pricing route	Sakana AI	xAI
Model family	fugu	grok
Accepted inputs	text, image	text, image
Produced outputs	text	text
Context window	1MHigher	500K
Max output	—	500K
Input price / 1M	—	$2.00
Output price / 1M	—	$6.00
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 vs Grok 4.5

Fugu

Grok 4.5

Key differences

Pricing, limits and capabilities

Which model should you choose?

Documentation and model profiles

Questions people ask

Compare a different pair