Grok 4 — xAI | Modeldex

Grok 4

Active

Most capable Grok model.

Updated 3 days agoStructured data from Modeldex catalog

AgenticLong context

Knowledge cutoff

Jul 31, 2025(9 months ago)

API release

Jul 9, 2025(9 months ago)

Not enough benchmark coverage yet for an Intelligence Index — needs at least 3 results across 2 categories.

History

Grok 4 became available via the xAI API on 2025-07-09.

Training & availability

Training data has a knowledge cutoff of 2025-07-31 — information about events after that date is unlikely to appear in the model's responses. xAI has not released the underlying model weights — access is via their hosted API only.

Capabilities

Context window: 256K tokens.
Max output: 256K tokens.
Input modalities: text.

Recommended for: agentic, long-context.

Limitations

Text-only — cannot process images, audio, or video inputs.

Quick start

Minimal example using the OpenRouter API. Copy, paste, replace the key.

from openai import OpenAI

client = OpenAI(
    base_url="https://openrouter.ai/api/v1",
    api_key="sk-or-...",
)
resp = client.chat.completions.create(
    model="xai/grok-4",
    messages=[{"role": "user", "content": "Explain quantum computing in one sentence."}],
)
print(resp.choices[0].message.content)

Cost calculator

Estimate your monthly bill. Presets are typical workload sizes.

Input tokens / month5.0M

@ $3/1M

Output tokens / month2.0M

@ $15/1M

Input cost

$15

5.0M × $3/1M

Output cost

$30

2.0M × $15/1M

Total / month

$45

$540 / year

Integrations & tooling support

Tool calling: Supported
Structured outputs: Not supported

Price vs quality

Premium pricing

Priced like a frontier model. Quality tier pending more benchmark coverage.

Quality percentile: —
Effective price: $12/1M
Pricing breakdown: $3/1M in
$15/1M out

Community ratings

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