Which is cheaper, Claude Opus 4.8 or Claude Opus 5?

Both list at $5 input / $25 output per 1M tokens.

Which is used more, Claude Opus 4.8 or Claude Opus 5?

Claude Opus 5, with 0.5% of the AI-written code reviewed by cubic in the week of Nov 2, 2026, against 0.2% for Claude Opus 4.8.

Updated Nov 9, 2026

Claude Opus 4.8 vs Claude Opus 5

Claude Opus 4.8 is no longer ranked because it now writes under 0.5% of AI-attributed lines, and Claude Opus 5 is no longer ranked because it now writes under 0.5% of AI-attributed lines.

Claude Opus 4.8 and Claude Opus 5 compared on relative bug rate and on price and usage.
Bug rate
	Claude Opus 4.8	Claude Opus 5
Relative bug rate	No longer ranked	No longer ranked
Details
Provider	Anthropic	Anthropic
Released	May 28, 2026	Jul 24, 2026
List price	$5 input / $25 output per 1M tokens	$5 input / $25 output per 1M tokens
Share of AI-written code, week of Nov 2	0.2%	0.5%

1.00 = average · lower is better

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Questions and answers

Which has fewer bugs, Claude Opus 4.8 or Claude Opus 5?: Claude Opus 4.8 is no longer ranked because it now writes under 0.5% of AI-attributed lines, and Claude Opus 5 is no longer ranked because it now writes under 0.5% of AI-attributed lines.
Which is cheaper, Claude Opus 4.8 or Claude Opus 5?: Both list at $5 input / $25 output per 1M tokens.
Which is used more, Claude Opus 4.8 or Claude Opus 5?: Claude Opus 5, with 0.5% of the AI-written code reviewed by cubic in the week of Nov 2, 2026, against 0.2% for Claude Opus 4.8.