When was Grok 3 released?

Grok 3 was released by SpaceXSI on Monday, Feb 17 2025.

Grok 3 was built by SpaceXSI. Elon Musk's AI company building the Grok series of models. Founded in 2023 as xAI, merged into SpaceX as SpaceXAI in 2026 and renamed SpaceXSI (SpaceX Super Intelligence) that October. Cursor (Anysphere) and its Composer coding models were acquired in 2026 and are tracked here.

Is Grok 3 open source?

No. Grok 3 is a closed 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 3?

SpaceXSI's previous tracked release was Grok‑2 on Aug 14 2024, 187 days earlier. It was followed by Grok 3 mini on Feb 17 2025.

Grok 3

Released Feb 17 2025

Grok 3 is an AI model released by SpaceXSI on Monday, Feb 17 2025, 187 days after Grok‑2.

Compare Grok 3 with

Grok 3

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About

Grok 3, released February 17, 2025 alongside Grok 3 mini, was trained on Colossus — xAI's Memphis supercomputer of around 200,000 GPUs — with roughly ten times the compute of Grok 2. It introduced Think mode for step-by-step reasoning and DeepSearch, an agentic research tool that scans the web and X in real time.

The release put xAI on the frontier map barely two years after the company's founding, with launch benchmarks competitive with o1 and Gemini 2.0 across math, science, and coding. It headlined xAI's lineup for five months until Grok 4 arrived in July 2025.

Frequently asked questions

: Grok 3 was released by SpaceXSI on Monday, Feb 17 2025.
: Grok 3 was built by SpaceXSI. Elon Musk's AI company building the Grok series of models. Founded in 2023 as xAI, merged into SpaceX as SpaceXAI in 2026 and renamed SpaceXSI (SpaceX Super Intelligence) that October. Cursor (Anysphere) and its Composer coding models were acquired in 2026 and are tracked here.
: No. Grok 3 is a closed model. The weights are not published — it is available only through the provider's own API, apps, or partner platforms.
: SpaceXSI's previous tracked release was Grok‑2 on Aug 14 2024, 187 days earlier. It was followed by Grok 3 mini on Feb 17 2025.