XA

Grok 4 Fast

by xAI

Tracked text vision API Available

Tracked release

This page is live so the release is discoverable quickly, but it is not treated as a fully evaluated ranked model yet. Pricing, context, availability, and source notes may already be present while benchmark and quality coverage are still being collected.

Input Price

$0.200

per 1M tokens

Output Price

$0.500

per 1M tokens

Context Window

2M

tokens

Max Output

30K

tokens

Quality Score

85

out of 100

Value Score

2000

quality per $

Details

Provider
xAI
Released
19 Sept 2025
Speed
150 tok/s
Open Source
No
API Available
Yes
Pricing Source
openrouter.ai/api/v1/models
Price Updated
21 Apr 2026

Notes

2M context; fast reasoning Tracking only until benchmark coverage is available. Tracking only until benchmark coverage is available.

Price History

Blended price trend (input + 3×output / 4)

$0.42 → $0.42
↑ 0%
Date Input $/1M Output $/1M Change
22 Feb 2026 $0.200 $0.500 —
23 Feb 2026 $0.200 $0.500 0.0%
24 Feb 2026 $0.200 $0.500 0.0%
25 Feb 2026 $0.200 $0.500 0.0%
26 Feb 2026 $0.200 $0.500 0.0%
27 Feb 2026 $0.200 $0.500 0.0%
28 Feb 2026 $0.200 $0.500 0.0%
1 Mar 2026 $0.200 $0.500 0.0%
2 Mar 2026 $0.200 $0.500 0.0%
3 Mar 2026 $0.200 $0.500 0.0%
4 Mar 2026 $0.200 $0.500 0.0%
5 Mar 2026 $0.200 $0.500 0.0%
6 Mar 2026 $0.200 $0.500 0.0%
7 Mar 2026 $0.200 $0.500 0.0%
8 Mar 2026 $0.200 $0.500 0.0%
9 Mar 2026 $0.200 $0.500 0.0%
10 Mar 2026 $0.200 $0.500 0.0%
11 Mar 2026 $0.200 $0.500 0.0%
12 Mar 2026 $0.200 $0.500 0.0%
13 Mar 2026 $0.200 $0.500 0.0%
14 Mar 2026 $0.200 $0.500 0.0%
15 Mar 2026 $0.200 $0.500 0.0%
27 Mar 2026 $0.200 $0.500 0.0%
27 Mar 2026 $0.200 $0.500 0.0%
28 Mar 2026 $0.200 $0.500 0.0%
29 Mar 2026 $0.200 $0.500 0.0%
30 Mar 2026 $0.200 $0.500 0.0%
31 Mar 2026 $0.200 $0.500 0.0%
31 Mar 2026 $0.200 $0.500 0.0%
8 Apr 2026 $0.200 $0.500 0.0%
8 Apr 2026 $0.200 $0.500 0.0%
8 Apr 2026 $0.200 $0.500 0.0%
8 Apr 2026 $0.200 $0.500 0.0%
8 Apr 2026 $0.200 $0.500 0.0%
8 Apr 2026 $0.200 $0.500 0.0%
8 Apr 2026 $0.200 $0.500 0.0%
9 Apr 2026 $0.200 $0.500 0.0%
9 Apr 2026 $0.200 $0.500 0.0%
9 Apr 2026 $0.200 $0.500 0.0%
9 Apr 2026 $0.200 $0.500 0.0%
9 Apr 2026 $0.200 $0.500 0.0%
9 Apr 2026 $0.200 $0.500 0.0%
9 Apr 2026 $0.200 $0.500 0.0%
9 Apr 2026 $0.200 $0.500 0.0%
9 Apr 2026 $0.200 $0.500 0.0%
10 Apr 2026 $0.200 $0.500 0.0%
10 Apr 2026 $0.200 $0.500 0.0%
10 Apr 2026 $0.200 $0.500 0.0%
10 Apr 2026 $0.200 $0.500 0.0%
10 Apr 2026 $0.200 $0.500 0.0%
10 Apr 2026 $0.200 $0.500 0.0%
10 Apr 2026 $0.200 $0.500 0.0%
10 Apr 2026 $0.200 $0.500 0.0%
10 Apr 2026 $0.200 $0.500 0.0%
10 Apr 2026 $0.200 $0.500 0.0%
10 Apr 2026 $0.200 $0.500 0.0%
10 Apr 2026 $0.200 $0.500 0.0%
10 Apr 2026 $0.200 $0.500 0.0%
10 Apr 2026 $0.200 $0.500 0.0%
10 Apr 2026 $0.200 $0.500 0.0%
10 Apr 2026 $0.200 $0.500 0.0%
10 Apr 2026 $0.200 $0.500 0.0%
10 Apr 2026 $0.200 $0.500 0.0%
11 Apr 2026 $0.200 $0.500 0.0%
11 Apr 2026 $0.200 $0.500 0.0%
11 Apr 2026 $0.200 $0.500 0.0%
11 Apr 2026 $0.200 $0.500 0.0%
11 Apr 2026 $0.200 $0.500 0.0%
11 Apr 2026 $0.200 $0.500 0.0%
11 Apr 2026 $0.200 $0.500 0.0%
11 Apr 2026 $0.200 $0.500 0.0%
11 Apr 2026 $0.200 $0.500 0.0%
11 Apr 2026 $0.200 $0.500 0.0%
11 Apr 2026 $0.200 $0.500 0.0%
19 Apr 2026 $0.200 $0.500 0.0%
20 Apr 2026 $0.200 $0.500 0.0%
21 Apr 2026 $0.200 $0.500 0.0%
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