OpenAI, Anthropic Cut AI Model Prices Amid Competition

OpenAI and Anthropic have simultaneously released more affordable versions of their flagship AI models, signaling an escalating price war as they compete for business clients increasingly focused on cost efficiency. These releases occurred within hours of each other, highlighting the intense rivalry between the two leading AI labs, despite recent calls from both companies for a slowdown in AI development. Anthropic introduced Claude Opus 5.5, which it claims matches the performance of its top-tier Fable 5.1 model but is approximately 40% less expensive to operate than the Opus 5 model launched in July. This marks the debut of a new model family, with Sonnet 5.5 and Haiku 5.5 anticipated in the coming weeks, according to Anthropic. The company stated that Claude Opus 5.5 is its most efficient model to date, and these savings in efficiency are being passed on to customers through reduced prices and increased rate limits. OpenAI responded by releasing GPT-6 Sol and GPT-6 Luna, which are offshoots of its recently launched GPT-6 Astra model. OpenAI indicated that these new models are designed to serve as versions of Astra suitable for everyday work. Furthermore, OpenAI significantly reduced its API costs, slashing them by 50% compared to the promotional pricing currently available for Astra's predecessor, GPT-5.6. This strategy of releasing lower-priced versions of its leading models is a recurring practice for OpenAI, as demonstrated with GPT-5.6. Based on the companies' announcements, OpenAI's API pricing appears to be lower than Anthropic's, as illustrated in a comparative table. OpenAI attributes these cost reductions to enhancements in caching and inference technologies, echoing Anthropic's sentiment that these savings are being directly transferred to users and customers. This intense price competition could potentially impact the long-term profitability and growth of both organizations. Ara Kharazian, lead economist at Ramp, commented to Fortune that the price war initiated by OpenAI and Anthropic is driving down the cost of AI, consequently diminishing their profit margins and the potential for future model price increases. Kharazian further explained that this competitive battle is unfolding on multiple fronts, with the AI labs facing pressure not only from each other but also from the growing availability of lower-cost open-weight models.