Posts tagged with "Claude Sonnet 5.5"

Claude Sonnet 5.5 and GPT-6.1 Sol reached Microsoft Foundry a day apart at the same $2/$10 list price, yet a cache-heavy 60-turn agent session costs $3.45 on Sonnet 5.5 and $2.55 on GPT-6.1 Sol, or $3.06 in the EU Data Zone that Claude still lacks. Above 272K input tokens the order flips, because GPT-6.1 Sol doubles its input rate while Sonnet 5.5 keeps flat pricing to 1M tokens and can run with no up-front reasoning.