GPT-5.6 Sol ties Claude Fable 5 atop AI frontend coding leaderboard

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Arena AI's latest Code Arena: Frontend rankings show GPT-5.6 Sol xHigh sharing first place with Anthropic's Claude Fable 5, marking the first time an OpenAI model has reached the top of the frontend leaderboard. GPT-5.6 Sol is priced at $5 per million input tokens and $30 per million output tokens, approximately half the cost of Fable. Despite the lower price, Sol performs comparably to Fable in frontend development, web app creation, and agentic coding tasks. The result intensifies competition for Anthropic, as restricting Fable's availability now carries the risk of users migrating to OpenAI's offering. Analysts suggest the development of Anthropic's upcoming Opus 5.0 model may need to be expedited in response.

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