Announced and implemented the price cuts, controlling the narrative by framing them as a self-driven efficiency story tied to Sol's inference-stack optimization rather than a reaction to competitors.
Frontier competitor whose Claude Haiku 4.5 ($1/$5) and Sonnet 4.6 ($3/$15) are now undercut by Luna and Terra; reportedly filed a confidential IPO prospectus alongside OpenAI, raising analyst concern about margin pressure from the price war.
Chinese open-weight rival that released V4 the same day as OpenAI's cut, pricing V4 Flash at 14 cents per million input tokens and directly forcing OpenAI's hand on cost.
Chinese lab behind the 2.8-trillion-parameter Kimi K3, valued at $35 billion and targeting a $50 billion pre-IPO valuation; its cheap, competitive models add further pricing pressure on OpenAI.
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Enterprise customers (e.g., Uber, Microsoft)
Large-scale buyers whose ballooning consumption-based AI bills forced frontier labs toward cost-conscious pricing; Uber reportedly burned through its entire 2026 AI budget within months of deploying Claude Code to roughly 5,000 engineers.