Which is cheaper, Claude Fable 5.1 or GPT-6 Sol?

Claude Fable 5.1 lists at $10 input / $50 output per 1M tokens; GPT-6 Sol lists at $2 input / $10 output per 1M tokens. GPT-6 Sol has the lower list price.

Updated Sep 26, 2026

Claude Fable 5.1 vs GPT-6 Sol

GPT-6 Sol does not have enough reviewed code to rank yet.

Claude Fable 5.1 and GPT-6 Sol compared on relative bug rate, by coding agent, bug type, and language, and on price and usage.
Bug rate
	Claude Fable 5.1	GPT-6 Sol
Relative bug rate	1.17	Launch week
Details
Provider	Anthropic	OpenAI
Released	Sep 1, 2026	Sep 22, 2026
List price	$10 input / $50 output per 1M tokens	$2 input / $10 output per 1M tokens

1.00 = average · lower is better

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Questions and answers

Which has fewer bugs, Claude Fable 5.1 or GPT-6 Sol?: GPT-6 Sol does not have enough reviewed code to rank yet.
Which is cheaper, Claude Fable 5.1 or GPT-6 Sol?: Claude Fable 5.1 lists at $10 input / $50 output per 1M tokens; GPT-6 Sol lists at $2 input / $10 output per 1M tokens. GPT-6 Sol has the lower list price.