WSJ: business spending on OpenAI and Anthropic models through OpenRouter was about even in September, down from Anthropic’s ~75% in January
Partly confirmed
Status
- Claim
Partly confirmed
- Our reporting
- Medium confidence
- Importance
- 3 of 5
- Last verified
- 8 October 2026
Your AI and this story
- GPT-6 Astra160 days after its cutoff
- Claude Opus 5.599 days after its cutoff
- Gemini 3.8 Flash190 days after its cutoff
- Grok 4.7129 days after its cutoff
None of these four assistants can know about it. The closest, Claude Opus 5.5, stops 99 days before it.
Key facts
- OpenRouter data (WSJ, Angel Au-Yeung, Oct 7): roughly even split of business spending between OpenAI and Anthropic models in September 2026 among ~120,000 companies using both; Anthropic had about 75% in January
- Weekly data: in the week of Sept 7, 2026 OpenAI’s share of combined OpenAI+Anthropic spend on OpenRouter passed 50% for the first time since Feb 2024; GPT-6 Astra alone was ~19% of that spend (OfficeChai, citing OpenRouter’s weekly wallet-share chart). Per the WSJ (via Trending Topics), Ramp data also showed OpenAI briefly ahead in mid-September before Anthropic narrowly regained the lead
- Price moves cited: OpenAI cut GPT-5.6 Luna by 80% and Terra by 20%, then launched GPT-6 Sol/Luna at half GPT-5.6 prices; Anthropic’s Claude Haiku 5.5 (Oct 7) costs one tenth of Haiku 4.5 for most requests, matching GPT-6 Luna
- Customer example: Retool spends about 20% less on OpenAI models than on comparable Anthropic offerings; a customer told the WSJ ‘The honeymoon phase of sticking with only one model provider is over’
- Caveat: OpenRouter covers only API traffic routed through it, not direct enterprise contracts, ChatGPT or Claude subscriptions
What happened
The WSJ used OpenRouter’s spending data to show OpenAI winning back business API customers during 2026. Anthropic had dominated paid spending on the platform through 2024–25 (about 75–80% of combined spend), largely on Claude coding models. OpenAI’s cheaper GPT-5.6 and GPT-6 models and GPT-6 Astra closed the gap by September.
Why it matters
Both labs are heading toward public listings, and investors read API market share as a sign of durable enterprise demand. The data also shows how fast price cuts move customers when switching costs are low.
Note: the WSJ article is paywalled; figures come from secondary summaries.
Sources
3 sources from 3 sites. Numbers match the chips in the text.
3 sources: 3 press
Press
- WSJ: The AI price war is heating up, and OpenAI is gaining ground on Anthropic (paywalled)wsj.com, press
- Trending Topics: Price war: OpenAI wins back business customers from Anthropic (WSJ summary)trendingtopics.eu, press
- OfficeChai: OpenAI surpasses Anthropic on OpenRouter spend for first time in 2.5 years (Sept 15)officechai.com, press
Changes
- Filed (Techmeme, X post by Jeffrey Lee Funk criticising the story)