Which is cheaper, Claude Fable 5 or Grok 4.7?

Claude Fable 5 lists at $10 input / $50 output per 1M tokens; Grok 4.7 lists at $2 input / $6 output per 1M tokens. Grok 4.7 has the lower list price.

Which is used more, Claude Fable 5 or Grok 4.7?

Grok 4.7, with 1.1% of the AI-written code reviewed by cubic in the week of Oct 26, 2026, against 0.4% for Claude Fable 5.

Updated Nov 4, 2026

Claude Fable 5 vs Grok 4.7

Claude Fable 5 is no longer ranked because it now writes under 0.5% of AI-attributed lines.

Claude Fable 5 and Grok 4.7 compared on relative bug rate and on price and usage.
Bug rate
	Claude Fable 5	Grok 4.7
Relative bug rate	No longer ranked	1.79
Details
Provider	Anthropic	xAI
Released	Jun 9, 2026	Sep 21, 2026
List price	$10 input / $50 output per 1M tokens	$2 input / $6 output per 1M tokens
Share of AI-written code, week of Oct 26	0.4%	1.1%

1.00 = average · lower is better

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Questions and answers

Which has fewer bugs, Claude Fable 5 or Grok 4.7?: Claude Fable 5 is no longer ranked because it now writes under 0.5% of AI-attributed lines.
Which is cheaper, Claude Fable 5 or Grok 4.7?: Claude Fable 5 lists at $10 input / $50 output per 1M tokens; Grok 4.7 lists at $2 input / $6 output per 1M tokens. Grok 4.7 has the lower list price.
Which is used more, Claude Fable 5 or Grok 4.7?: Grok 4.7, with 1.1% of the AI-written code reviewed by cubic in the week of Oct 26, 2026, against 0.4% for Claude Fable 5.