Atlas / xAI / Grok 4

Grok 4

xAI's flagship model. Strong reasoning with real-time knowledge via X platform integration.

Active Reasoning Tools Vision

Current pricing

Input

$3.00

Output

$15.00

Cached input

$0.75

per 1M tokens Source ↗

Specifications

Context window

131.1K tokens

Max output

16.4K tokens

Knowledge cutoff

Jul 2025

Capabilities

✓ Function calling / Tools

✓ Image understanding

✓ Extended thinking / Reasoning

✗ Audio input/output

TierUnitInputCached inputOutputEffectiveSource

Standard Per 1M tokens $3.00 $0.75 $15.00 March 12, 2026 Source

Standard Per 1M tokens $3.00 $0.75 $15.00 March 11, 2026 Source

Standard Per 1M tokens $3.00 $0.75 $15.00 March 10, 2026 Source

Standard Per 1M tokens $3.00 $0.75 $15.00 March 9, 2026 Source

Standard Per 1M tokens $3.00 $0.75 $15.00 March 8, 2026 Source

Standard Per 1M tokens $3.00 $0.75 $15.00 March 7, 2026 Source

Standard Per 1M tokens $3.00 $0.75 $15.00 March 6, 2026 Source

Standard Per 1M tokens $3.00 $0.75 $15.00 March 1, 2026 Source

Standard Per 1M tokens $3.00 $0.75 $15.00 Feb. 22, 2026 Source

Standard Per 1M tokens $3.00 $0.75 $15.00 Feb. 15, 2026 Source

Standard Per 1M tokens $3.00 $0.75 $15.00 Feb. 8, 2026 Source

Standard Per 1M tokens $3.00 $0.75 $15.00 Feb. 1, 2026 Source

Standard Per 1M tokens $3.00 $0.75 $15.00 Jan. 25, 2026 Source

Standard Per 1M tokens $3.00 $0.75 $15.00 Jan. 11, 2026 Source

Standard Per 1M tokens $3.00 — $15.00 Jan. 10, 2026 Source