Benchmarks

xAI: Grok 4.1 Fast

x-ai/grok-4.1-fast

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...

Prompt $/1M
$0.200
Completion $/1M
$0.500
Context
2,000,000 tok
Best provider
92 tok/s · xAI

Specs

Model id
x-ai/grok-4.1-fast
Display name
xAI: Grok 4.1 Fast
Modality
text+image+file->text
Tokenizer
Grok
Instruct type
—
Context length
2,000,000
Max completion
30,000
Prompt $/1M
$0.200
Completion $/1M
$0.500
Free tier
no

Capabilities

  • Function callingno
  • JSON modeno
  • System promptno
  • Visionno
  • Moderatedno

Benchmark scores

Each axis is one benchmark, normalized to the best model in the field.

No benchmark data for this model.

Speed by provider

Providertok/s
xAIfastest92
xAI: Grok 4.1 Fast - Benchmarks, Pricing and Speed | TryAii