Updated

GPT-5.5 vs GPT-6 Sol

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

GPT-5.5 and GPT-6 Sol compared on relative bug rate, by coding agent, bug type, and language, and on price and usage.
GPT-5.5GPT-6 Sol
Bug rate
Relative bug rate0.47Launch week
Details
ProviderOpenAIOpenAI
ReleasedApr 23, 2026Sep 22, 2026
List price$5 input / $30 output per 1M tokens$2 input / $10 output per 1M tokens

1.00 = average · lower is better

More comparisons

Questions and answers

Which has fewer bugs, GPT-5.5 or GPT-6 Sol?
GPT-6 Sol does not have enough reviewed code to rank yet.
Which is cheaper, GPT-5.5 or GPT-6 Sol?
GPT-5.5 lists at $5 input / $30 output per 1M tokens; GPT-6 Sol lists at $2 input / $10 output per 1M tokens. GPT-6 Sol has the lower list price.