Which is cheaper, Claude Opus 5.5 or GPT-5.6 Sol?

Both list at $4 input / $20 output per 1M tokens.

Which is used more, Claude Opus 5.5 or GPT-5.6 Sol?

Claude Opus 5.5, with 66.2% of the AI-written code reviewed by cubic in the week of Nov 2, 2026, against 0.3% for GPT-5.6 Sol.

Updated Nov 9, 2026

GPT-5.6 Sol is no longer ranked because it now writes under 0.5% of AI-attributed lines.

Claude Opus 5.5 and GPT-5.6 Sol compared on relative bug rate and on price and usage.
Bug rate
	Claude Opus 5.5	GPT-5.6 Sol
Relative bug rate	1.11	No longer ranked
Details
Provider	Anthropic	OpenAI
Released	Sep 22, 2026	Jul 9, 2026
List price	$4 input / $20 output per 1M tokens	$4 input / $20 output per 1M tokens
Share of AI-written code, week of Nov 2	66.2%	0.3%

1.00 = average · lower is better

Which has fewer bugs, Claude Opus 5.5 or GPT-5.6 Sol?: GPT-5.6 Sol is no longer ranked because it now writes under 0.5% of AI-attributed lines.
Which is cheaper, Claude Opus 5.5 or GPT-5.6 Sol?: Both list at $4 input / $20 output per 1M tokens.
Which is used more, Claude Opus 5.5 or GPT-5.6 Sol?: Claude Opus 5.5, with 66.2% of the AI-written code reviewed by cubic in the week of Nov 2, 2026, against 0.3% for GPT-5.6 Sol.