{"slug": "ai-agents-are-starting-to-set-the-prices-you-pay-online", "title": "AI Agents Are Starting to Set the Prices You Pay Online", "summary": "ChatGPT's Instant Checkout converted purchases at roughly a third of the rate of purchases that sent shoppers to Walmart's website, Walmart executive Daniel Danker told WIRED, prompting OpenAI to shift focus from Instant Checkout to product discovery and merchant-controlled checkout. Instant Checkout launched with Etsy in September 2025, with Shopify merchants expected to follow and Walmart joining later that year; Walmart now runs its own Sparky shopping experience inside ChatGPT with account linking, synchronized baskets, loyalty benefits and Walmart's payment system. A 2025 arXiv study titled \"What Is Your AI Agent Buying?\" found GPT-4.1 failed to pick the cheapest of eight otherwise identical listings carrying a 1% discount 9.3% of the time, and that in a quarter of tested category-and-model combinations a one-shot product-description change produced a statistically significant gain in selection share.", "body_md": "*Roughly a third: that's how well ChatGPT's checkout converted for Walmart compared with sending shoppers to Walmart's website. The result exposed the limitations of one of the largest early tests of in-chat commerce.*\n\nPurchases completed through ChatGPT's Instant Checkout converted at roughly a third of the rate of purchases that sent shoppers to Walmart's website, Walmart executive Daniel Danker told WIRED. The single-item checkout separated purchases from customers' existing Walmart baskets and prevented the retailer from bundling related products. OpenAI subsequently shifted its focus from Instant Checkout to product discovery and merchant-controlled checkout. Instant Checkout launched with Etsy in September 2025, with Shopify merchants expected to follow, while Walmart joined later that year. Walmart now runs its own Sparky shopping experience inside ChatGPT, supporting account linking, synchronized baskets, loyalty benefits and Walmart's payment system.\n\nThat's the unglamorous, very real starting point for a bigger shift. AI agents are not some future abstraction bolted onto e-commerce. They're already inside the pricing conversation, on both sides of the register, and the early results are messier than the pitch decks suggested.\n\nThe pitch for shopping agents is that they'll do what you'd do yourself, if you had unlimited patience: compare every option, ignore marketing, and pick the cheapest one that fits. A study first posted on arXiv in 2025 under the title \"What Is Your AI Agent Buying?\" tested that claim directly. In a test where one of eight otherwise identical listings carried a 1% discount, GPT-4.1 failed to choose the cheapest item 9.3% of the time, although its error rate fell sharply with larger discounts. The same research found something sellers will find more useful than reassuring: agents can cluster their demand on a small number of \"modal\" products rather than spreading it evenly. In a quarter of the tested category-and-model combinations, a one-shot change to a product description produced a statistically significant gain in its selection share.\n\nThat's a new kind of SEO. Instead of writing for Google's crawler, sellers now have an incentive to write listings an AI agent will favour. A startup that figures out which words move a buyer-agent's attention has found a real wedge - and it's one several agentic-commerce platforms are already chasing.\n\n[OpenAI has switched on marketing cookies by default for free ChatGPT users and the business model implications are harder to ignore than the privacy settings](https://startupfortune.com/openai-has-switched-on-marketing-cookies-by-default-for-free-chatgpt-users-and-the-business-model-implications-are-harder-to-ignore-than-the-privacy-settings/)\n\nWired's finding that OpenAI has enabled marketing cookies by default for free ChatGPT users reveals the commercial pressure building underneath the company's infrastructure positioning, and suggests that advertising-adjacent data monetization may be becoming a structural feature of free AI products rather than a temporary policy choice. The... - [how to disable marketing cookies on ChatGPT](https://startupfortune.com/openai-has-switched-on-marketing-cookies-by-default-for-free-chatgpt-users-and-the-business-model-implications-are-harder-to-ignore-than-the-privacy-settings/) - [free ChatGPT users tracked by default cookies](https://startupfortune.com/openai-has-switched-on-marketing-cookies-by-default-for-free-chatgpt-users-and-the-business-model-implications-are-harder-to-ignore-than-the-privacy-settings/)\n\n## Merchant agents are being built to bid, not just list\n\nOn the seller side, the shift could move fixed prices closer to live negotiation. Capgemini has forecast that grocers will develop merchant-side AI tools capable of bidding for baskets in real time, adjusting prices and offers to meet margin targets or encourage shoppers to spend more. Google's Agent2Agent protocol, introduced in 2025, gives independently built agents a standard way to communicate and coordinate across systems.\n\nProcurement has moved furthest, fastest. The dollar amounts justify the investment sooner. Walmart has deployed negotiation agents from a company called Pactum to handle tail-spend contracts. Those are the thousands of smaller supplier deals too numerous for human buyers to negotiate one by one. Salesforce, meanwhile, offers conversation-based Agentforce pricing at $2 per conversation alongside action-based credits and per-user plans. That's a small data point in itself about how seriously enterprise software now treats \"an agent talking to another agent\" as a billable unit of work.\n\nHere's the part that should worry anyone who buys things online rather than sells them. When pricing moves from a posted number to a real-time, model-driven negotiation, it gets a lot harder for a regulator, or a shopper, to tell aggressive competition from quiet coordination. Experimental research has found that independently operated pricing algorithms can learn strategies that sustain prices above competitive levels without communicating with one another.\n\nNone of this makes agentic commerce a bad bet. It makes it an unfinished one. Nearly 40% of B2B buyers are already using agentic AI somewhere in their purchasing process, according to data cited by Deloitte. Only about a quarter of suppliers have built agents to meet them, and most of the rest say they plan to. That gap is the opening: buyers are automating faster than sellers can respond. A founder building pricing or negotiation infrastructure for the seller side has room to work there, before the market closes it.\n\nWalmart's experience with Instant Checkout is the lesson underneath all of it. The infrastructure for AI agents to buy and sell on your behalf is real, and it is being built fast. It is nowhere near reliable yet. Anyone selling online now has two customers to satisfy: the human, and the model shopping for them.\n\n**Also read:** [Stanford and Berkeley Researchers Build TokenGate to Cut LLM Prefill Costs](https://startupfortune.com/stanford-and-berkeley-researchers-build-tokengate-to-cut-llm-prefill-costs/) • [A hobbyist project called CrowdGPT wants volunteers to train an AI model at home](https://startupfortune.com/a-hobbyist-project-called-crowdgpt-wants-volunteers-to-train-an-ai-model-at-home/) • [Grok Releases Seven Minutes of Its AI-Made Odyssey Series](https://startupfortune.com/grok-releases-seven-minutes-of-its-ai-made-odyssey-series/)\n\n*This article is posted in [AI News](https://startupfortune.com/category/ai/), check it out for more related stories.*\n\n## Join the discussion\n\n[Open in the community →](https://startupfortune.com/community/)\n\nAlmost there. Sign in and your reply posts straight away.", "url": "https://wpnews.pro/news/ai-agents-are-starting-to-set-the-prices-you-pay-online", "canonical_source": "https://startupfortune.com/ai-agents-are-starting-to-set-the-prices-you-pay-online/", "published_at": "2026-10-26 11:22:23+00:00", "updated_at": "2026-10-26 11:41:27.595151+00:00", "lang": "en", "topics": ["ai-agents", "ai-products", "generative-engine-optimization", "ai-search"], "entities": ["OpenAI", "ChatGPT", "Walmart", "Daniel Danker", "Etsy", "Shopify", "Sparky", "Capgemini"], "also_reported_by": [], "alternates": {"html": "https://wpnews.pro/news/ai-agents-are-starting-to-set-the-prices-you-pay-online", "markdown": "https://wpnews.pro/news/ai-agents-are-starting-to-set-the-prices-you-pay-online.md", "text": "https://wpnews.pro/news/ai-agents-are-starting-to-set-the-prices-you-pay-online.txt", "jsonld": "https://wpnews.pro/news/ai-agents-are-starting-to-set-the-prices-you-pay-online.jsonld"}}