Breaking

xAI to Release Grok 4.5 Publicly on July 9, 1.5T Parameters

July 8, 2026 at 02:53 EDT

Foundation Models

Elon Musk announced on July 8, 2026 that xAI (referred to as @SpaceXAI in his post) will make its new model "Grok 4.5" publicly available the following day, July 9. He claims it matches Anthropic's Claude Opus in class while being faster, more token-efficient and lower cost.

July 8 · xAI

Grok 4.5 goes public — an "Opus-class" model, faster and cheaper

Elon Musk says the next-gen model launches July 9, built on a 1.5-trillion-parameter foundation and tuned with developer-workflow data. All performance claims are internal — no independent benchmarks yet.

1.5T

Parameters in the "V9" foundation model

Jul 9

Scheduled public release date

New models per year planned for 2026 (one every month)

2026 CADENCE — a model trained from scratch every month

Each block = one brand-new model release

Typical rival pace

xAI's planned 2026 output

THE "DATA FLYWHEEL" — one entity controls the whole loop

Compute
SpaceX / Tesla

→

Train model
V9 + RL

→

Cursor workflow data
coding signal

↺

Anticipation

Internal beta at SpaceX and Tesla drew "strong positive feedback." Claimed close to — or exceeding — Claude Opus, while faster, more token-efficient and lower cost.

Caution

All figures are self-reported. No independent benchmarks submitted, and context length and pricing remain unknown until after release.

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