About
Grok 4.1 Fast is xAI's best agentic tool calling model that shines in real-world use cases like customer support and deep research. 2M context window. Reasoning can be enabled/disabled using...
Related Models
Pricing
Input
$0.20
per 1M tokens
Output
$0.50
per 1M tokens
Blended
$0.28
per 1M tokens
Cheaper than 63% of models. Median price is $0.54/1M tokens.
Cost Calculator
Tokens per day1M
100K100M
Daily
$0.28
Monthly
$8.25
vs. Similar Models
GLM-4.6V (Reasoning)Q:-0.1
$0.45+64%
o1-previewQ:+0.1
$28.88+10400%
GPT-5.4 mini (Non-Reasoning)Q:-0.3
$1.69+514%
Nova 2.0 Omni (low)Q:-0.3
$0.85+209%
Performance
83
tokens/sec
Faster than 42% of models
0.42
seconds
Faster than 94% of models
0.42
seconds
Faster than 96% of models
Market Median
94 tok/s
12% slower
Median TTFT
1.11s
62% faster
Throughput/Dollar
302
tok/s per $/1M
Speed Comparison
Z.ai: GLM 5.1
83 tok/s+0%
Ministral 3 8B
83 tok/s-0%
GPT-5.5 (high)
83 tok/s+0%
Context Window
2.0M
tokens
Larger than 98% of models
Max Output
30K
tokens
2% of context
Benchmarks
MMLU-Pro
74.3%
GPQA Diamond
63.7%
HLE
5.0%
LiveCodeBench
39.9%
SciCode
29.6%
TerminalBench Hard
14.4%
MATH-500Not evaluated
AIMENot evaluated
AIME 2025
34.3%
IFBench
36.5%
Long Context Recall
22.0%
Tau2
63.7%
Market AverageTop Score