When was Grok‑1.5 released?

Grok‑1.5 was released by SpaceXAI on Friday, Mar 29 2024.

Grok‑1.5 was built by SpaceXAI. Elon Musk's AI company building the Grok series of models. Founded in 2023 as xAI, now part of SpaceX. Cursor (Anysphere) and its Composer coding models were acquired in 2026 and are tracked here.

Is Grok‑1.5 open source?

No. Grok‑1.5 is a proprietary model. The weights are not published — it is available only through the provider's own API, apps, or partner platforms.

What came before and after Grok‑1.5?

SpaceXAI's previous tracked release was Grok‑1 on Nov 3 2023, 147 days earlier. It was followed by Grok‑2 on Aug 14 2024.

Grok‑1.5

Released Mar 29 2024

Grok‑1.5 is an AI model released by SpaceXAI on Friday, Mar 29 2024, 147 days after Grok‑1.

Compare Grok‑1.5 with

Grok‑1.5

Suggested comparisons

Grok‑1.5vsGrok 4.6 Grok‑1.5vsGPT-6 Astra Grok‑1.5vsClaude Fable 5.1 Grok‑1.5vsGemini 3.8 Flash Grok‑1.5vsMuse Spark 1.3 Grok‑1.5vsDeepSeek-V4.1-Flash Grok‑1.5vsMistral Medium 3.5 Grok‑1.5vsKimi K3 Grok‑1.5vsGLM-5.3-Flash Grok‑1.5vsQwen3.8-Max-0902 Grok‑1.5vsNemotron 3.5 Lightning

Frequently asked questions

: Grok‑1.5 was released by SpaceXAI on Friday, Mar 29 2024.
: Grok‑1.5 was built by SpaceXAI. Elon Musk's AI company building the Grok series of models. Founded in 2023 as xAI, now part of SpaceX. Cursor (Anysphere) and its Composer coding models were acquired in 2026 and are tracked here.
: No. Grok‑1.5 is a proprietary model. The weights are not published — it is available only through the provider's own API, apps, or partner platforms.
: SpaceXAI's previous tracked release was Grok‑1 on Nov 3 2023, 147 days earlier. It was followed by Grok‑2 on Aug 14 2024.