Longest words

Penny win✓ Verified run (measured in the hosted demo)Oct 4, 2026

Claude Code 2.1.289claude-sonnet-5-5Native Penny

Cost−$0.049

−33%

Penny 33% cheaper

Native

$0.148Penny

$0.099

Tokens−20.8k

−30%

Penny 30% fewer tokens

Native

69.1kPenny

48.3k

Model calls±0

Even

No difference

Native

4Penny

Native

longest-words.html

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Penny

longest-words.html

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Session Details

	Native	Penny
Model	claude-sonnet-5-5	claude-sonnet-5-5
Model calls	4	4
Cache read	33.1k	30.9k
Cache write	28.0k	9.8k
Fresh input	906	767
Output	7.0k	6.8k
Total tokens	69.1k	48.3k
Background calls	claude-haiku-4-5-20251001 ×1	claude-haiku-4-5-20251001 ×1
Cost	$0.148	$0.099

Costs are API-equivalent estimates at Standard prices, including the main conversation, subagents and background calls such as titles and the auto-mode reviewer.