SpaceXAI

The lab is now a division of a rocket company. SpaceX acquired xAI on 2 February 2026 in an all-stock transaction that made it a wholly owned subsidiary, and in July 2026 the name, logo and handle changed to SpaceXAI. The change has already reached the product listings: OpenRouter's description of the current flagship reads "SpaceXAI's smartest model".

The interesting number is the one that went down. The catalog's Grok rows run x-ai/grok-4.20 (31 March 2026) at 2000000tokensopenrouter-models, last checked 2026-09-14 of context, x-ai/grok-4.3 (30 April) at 1000000tokensopenrouter-models, last checked 2026-09-14, then x-ai/grok-4.5 (8 July) at 500000tokensopenrouter-models, last checked 2026-09-14 and x-ai/grok-4.6 (12 August) at 500000tokensopenrouter-models, last checked 2026-09-14. Over four months and four releases the advertised window shrank by three-quarters — while Anthropic, OpenAI, Google, DeepSeek, Meta, Moonshot AI and Z.ai all list a million-token window or more on their current rows in the same snapshot. Nobody markets a context reduction; you find it by reading the rows in date order.

What rose while the window fell was capability and price. The listed input price moved from $1.25per million tokensopenrouter-models, last checked 2026-09-14 on the April row to $2.00per million tokensopenrouter-models, last checked 2026-09-14 in August, and the Artificial Analysis intelligence index the catalog carries went from 39.1openrouter-models, last checked 2026-09-14 on the July row to 44.4openrouter-models, last checked 2026-09-14 on the August one. Whatever the July architecture change was, it was not sold as a trade — the shorter window was never a headline.

One more thing the rows record: version numbers here are not decimals. x-ai/grok-4.20 was listed on 31 March and x-ai/grok-4.3 a month later, so the sequence reads 4.20 then 4.3. Sorting this vendor's models by parsing the number after the dot puts them in the wrong order, which is a small, real reason a catalog should key on listing dates and ids rather than on names.