Question 1

What does this Claude Opus 4.5 (latest) vs Fugu 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: Claude Opus 4.5 (latest) or Fugu?

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: Claude Opus 4.5 (latest) or Fugu?

Accepted Answer

Claude Opus 4.5 (latest) lists 200K tokens and Fugu lists 1M. Fugu therefore has the larger recorded context window, but capacity alone is not a quality score.

Question 4

Which is faster: Claude Opus 4.5 (latest) or Fugu?

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 Claude Opus 4.5 (latest) and Fugu support?

Accepted Answer

Claude Opus 4.5 (latest) records text, image, pdf input and text output. Fugu 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 Claude Opus 4.5 (latest) or Fugu?

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	Claude Opus 4.5 (latest)	Fugu
Provider	Anthropic	Sakana AI
Listed pricing route	Anthropic	Sakana AI
Model family	claude-opus	fugu
Accepted inputs	text, image, pdf	text, image
Produced outputs	text	text
Context window	200K	1MHigher
Max output	64K	—
Input price / 1M	$5.00	—
Output price / 1M	$25.00	—
Reasoning mode	Documented	Documented
Tool calling	Documented	Documented
Image input	Documented	Documented
Audio input	Not documented	Not documented
Structured output	Not documented	Documented
License	Proprietary	Proprietary

Claude Opus 4.5 (latest) vs Fugu

Claude Opus 4.5 (latest)

Fugu

Key differences

Pricing, limits and capabilities

Which model should you choose?

Documentation and model profiles

Questions people ask

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