Elon Musk-led xAI is expected to launch its next major AI model, Grok 3.5, soon. Over the past week, several posts on X (formerly Twitter) have revealed new code references, app updates, and subtle confirmations from Musk himself, all pointing toward an imminent launch.
xAI keeps preparing Grok 3.5 for the upcoming release. A new model reference "grok-3-5-api-2k-p2" has been spotted in the latest web build, along with a mention of "grok 3.5 flexible input".
— TestingCatalog News 🗞 (@testingcatalog) May 24, 2025
Let's see if the API will be released as well 👀 pic.twitter.com/f7S9EHgeQM
A recent post by @testingcatalog caught attention after spotting a model labeled “grok-3-5-api-2k-p2” in Grok’s latest web build. The leak also mentioned support for “flexible input,” hinting at possible changes to the model’s context handling or API capabilities.
Meanwhile, another post by @whylifeis4 showed that the Grok iOS app now displays a model selector directly in the text input area. It started a conversation that the launch could be closer than expected.
The ui for the Grok iOS app now shows the model selector on the text bar, Is grok 3.5 close?
— Charlie L. (@whylifeis4) May 26, 2025
Rolling out now@techdevnotes @testingcatalog pic.twitter.com/R3fjjP1vkt
Furthermore, in response to a tweet comparing models like Veo 3 and Claude 4, Musk also weighed in, saying Grok 3.5 would focus on “reasoning from first principles (truth).” This indicates that the upcoming Grok model will prioritize deep technical accuracy over surface-level answers.
Reasoning from first principles (truth)
— Elon Musk (@elonmusk) May 24, 2025
So far, xAI hasn’t officially announced the Grok 3.5 release. But the community is watching closely. The presence of backend changes, UI tweaks, and Musk’s own words hint that the Grok 3.5 rollout may have already begun in the background.
This is not the first time people are speculating about the Grok 3.5 launch. Recently, when some users spotted references to “Grok-3.5” in the chatbot’s code base, similar rumors were spread across the community that the Grok 3.5 launch was just around the corner. But so far, we have not seen any official announcement. So, until we get some concrete evidence, it’s better to take all this information with a grain of salt.
