Which is cheaper, Claude Opus 4.8 or GPT-6 Astra?

Claude Opus 4.8 lists at $5 input / $25 output per 1M tokens; GPT-6 Astra lists at $10 input / $50 output per 1M tokens. Claude Opus 4.8 has the lower list price.

Which is used more, Claude Opus 4.8 or GPT-6 Astra?

GPT-6 Astra, with 4.5% 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 GPT-6 Astra

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

Claude Opus 4.8 and GPT-6 Astra compared on relative bug rate and on price and usage.
Bug rate
	Claude Opus 4.8	GPT-6 Astra
Relative bug rate	No longer ranked	0.95
Details
Provider	Anthropic	OpenAI
Released	May 28, 2026	Sep 4, 2026
List price	$5 input / $25 output per 1M tokens	$10 input / $50 output per 1M tokens
Share of AI-written code, week of Nov 2	0.2%	4.5%

1.00 = average · lower is better

More comparisons

All comparisons →

Questions and answers

Which has fewer bugs, Claude Opus 4.8 or GPT-6 Astra?: Claude Opus 4.8 is no longer ranked because it now writes under 0.5% of AI-attributed lines.
Which is cheaper, Claude Opus 4.8 or GPT-6 Astra?: Claude Opus 4.8 lists at $5 input / $25 output per 1M tokens; GPT-6 Astra lists at $10 input / $50 output per 1M tokens. Claude Opus 4.8 has the lower list price.
Which is used more, Claude Opus 4.8 or GPT-6 Astra?: GPT-6 Astra, with 4.5% of the AI-written code reviewed by cubic in the week of Nov 2, 2026, against 0.2% for Claude Opus 4.8.