Models · The Decoder ·
GPT-5.6 Sol nearly matches Fable 5 on aggregated benchmarks at one-third the cost
OpenAI’s GPT-5.6 Sol scored 59 on the Artificial Analysis Intelligence Index, one point below Claude Fable 5. The model costs $1.04 per task, about one-third of Anthropic’s top model, and leads competitors in agentic coding benchmarks.