Updated

Claude Fable 5.2 vs GPT-5.6 Sol

Claude Fable 5.2 does not have enough reviewed code to rank yet, and GPT-5.6 Sol is no longer ranked because it now writes under 0.5% of AI-attributed lines.

Claude Fable 5.2 and GPT-5.6 Sol compared on relative bug rate and on price.
Claude Fable 5.2GPT-5.6 Sol
Bug rate
Relative bug rateLaunch weekNo longer ranked
Details
ProviderAnthropicOpenAI
ReleasedNov 9, 2026Jul 9, 2026
List price$8 input / $40 output per 1M tokens$4 input / $20 output per 1M tokens

1.00 = average · lower is better

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Questions and answers

Which has fewer bugs, Claude Fable 5.2 or GPT-5.6 Sol?
Claude Fable 5.2 does not have enough reviewed code to rank yet, and GPT-5.6 Sol is no longer ranked because it now writes under 0.5% of AI-attributed lines.
Which is cheaper, Claude Fable 5.2 or GPT-5.6 Sol?
Claude Fable 5.2 lists at $8 input / $40 output per 1M tokens; GPT-5.6 Sol lists at $4 input / $20 output per 1M tokens. GPT-5.6 Sol has the lower list price.