GPT-5.6 Sol nearly matches Fable 5 — but costs a fraction of the price
gpt-5.6 sol scores 59 on the intelligence index, one point behind fable 5, yet costs just $1.04 per task compared to fable 5's $2.75. this pricing pressure challenges anthropic's premium positioning.
openai released gpt-5.6 sol, a model that scores 59 on the artificial analysis intelligence index, just one point behind claude fable 5, but significantly undercuts it on price at $1.04 versus $2.75 per task. sol dominates the new coding agent index with 80 points and reduces output token usage by up to 54 percent for agentic tasks, while smaller variants terra and luna offer even lower costs. by introducing cache-read discounts and pushing a new pareto frontier for intelligence versus cost, openai is directly challenging anthropic's margins. this move heightens the price war initiated by lower-cost competitors like meta and xai, forcing the industry to prioritize economic efficiency alongside capability gains.