ANNOUNCEMENT · GROK 3

# Understand the universe.

xAI builds artificial intelligence to accelerate human scientific discovery. We are guided by our mission to advance our collective understanding of the universe.

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CONTEXT
1M
tokens · 8× the previous frontier
TPU CLUSTER
200K
H100s · Memphis Colossus
LATENCY
86ms
first-token, p50, US-East
BENCH AVG
92.3
across MMLU · GPQA · HMMT
PRODUCTS

## From a model to an entire stack.

Grok for conversation. Voice for natural interfaces. The API for production. The Macroscope for understanding our largest training runs.

GROK 3

### The most capable Grok yet.

Reasoning trained on a curated curriculum spanning math, code, and the open web. Available in the Grok app, on X, and via API.

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GROK VOICE

### Custom voices for any product.

Sub-300ms latency, expressive prosody, and voice cloning under tight consent gates. Ship voice agents that don't sound like dictation.

Listen to samples
API

### Production-ready inference.

Drop-in compatible with the OpenAI client. Streaming, tool calls, structured outputs, multi-region. Pay only for tokens you use.

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RESEARCH

### The Macroscope.

Tools for understanding what large models learn. Open notebooks on interpretability, evals, and the long-tail of reasoning failures.

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GROK PLAYGROUND grok-3 SESSION · 0xA17C
CONVERSATIONS
Probing dark matter halos
Refactor pytest fixtures
Genome alignment search
Q3 board narrative
MODELS
grok-3 · base
grok-3 · reasoning
grok-3 · vision
𝐔
If a galaxy's rotation curve is flat out to 50 kpc, what's the minimum dark-matter halo mass we should expect, and which models are still consistent at that radius?
⊛
Quick estimate: for a flat curve at ~220 km/s out to 50 kpc, enclosed mass scales as M(r) = v² r / G — giving roughly 5.6 × 10¹¹ M☉ within that radius.
Models still consistent: standard ΛCDM NFW halos with concentration c ≈ 8–12 fit cleanly. SIDM remains viable but predicts a slightly cored profile inside ~3 kpc. MOND-only solutions struggle past ~30 kpc here without an additional dark component.
PRICING

## Pay per token. Nothing else.

Three plans. No volume tiers, no marketing seats. Build a prototype on the Free tier, scale to production without re-architecting.

FREE
$0/mo
For builders, hobbyists, and academia.

- 100k tokens · Grok 3
- Community forum
- Standard latency

Start free
PRO
$30/mo
For builders shipping production agents.

- 10M tokens · all models
- Grok Voice · 200 minutes
- Priority queue
- Email support

Sign up now
ENTERPRISE
Custom
For teams and regulated workloads.

- Dedicated GPU capacity
- SOC 2 Type II, HIPAA
- Fine-tuning & evals
- Dedicated CSM

Contact us
DESIGN SYSTEM · V.ALPHA

## The system in the open.

Tokens and primitives behind the xAI marketing surface — colors grouped by role, the Universal-Sans-and-Geist-Mono ladder, the radius scale, and the canonical component set. Source: DESIGN.md. Single near-black canvas. Pill is the brand.

01 · Color

### One canvas. One ink. Sunset and dusk live in illustrations only.

Brand & Text
primary / ink
#ffffff
ink-hover
#fafaf7
body
#dadbdf
body-mid / mute
#7d8187
on-primary
#0a0a0a
hairline
#212327
Surface
canvas
#0a0a0a
canvas-soft
#1a1c20
canvas-card
#191919
canvas-mid
#363a3f
accent-midnight
#0d1726
Accent (illustrations only)
sunset
#ff7a17
sunset-soft
#ffc285
dusk
#7c3aed
twilight
#c4b5fd
breeze
#a0c3ec
02 · Typography

### Weight 400 only. Negative tracking is the emphasis. Mono uppercase eyebrows.

display-xl
96 / 96 / -2.4 / 400
Understand the universe.
display-lg
72 / 72 / -1.8 / 400
The frontier model.
display-md
48 / 48 / -1.2 / 400
Section headlines
display-sm
32 / 36 / -0.6 / 400
Card cluster heading
display-xs
20 / 28 / 0 / 400
Inline display sizing
body-lg
18 / 28 / 0 / 400
Lead paragraph. Plenty of measure.
body-md
16 / 24 / 0 / 400
Default body copy.
body-sm
14 / 20 / 0 / 400
Secondary body and captions.
caption-mono
Mono / 14 / 1.4 / UPPER
SECTION EYEBROW
caption-mono-sm
Mono / 12 / 1.2 / UPPER
SMALL LABEL
button-md
14 / 20 / 0 / 400
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03 · Radius

### Two values. Cards get 8px. Everything interactive is a pill.

none
0
sm
8px
pill
9999
full
9999
04 · Components

### White outline pills carry every action. Hairline borders carry every elevation.

#### Buttons

Outline pill is canonical. One filled white pill exists, for sign-up only.
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Sign up now Get access

#### Inputs

canvas-soft fill, 8px radius, hairline border, brighter on focus.
EMAIL
QUERY (FOCUSED)

#### Cards

canvas-card fill, 8px radius, 1px hairline. No shadows.
PRODUCT · GROK
The most capable Grok.
Reasoning trained on a curated curriculum.

#### Badges

Hairline outline by default. Tinted variants reserved for product moments.
DEFAULT SHIPPED PREVIEW RESEARCH
𝕏AI
View DESIGN.md ↗