Last refreshed 2026-10-18. Next refresh: weekly.
Why use Grok 4.1 Fast on GCP Vertex AI?
GCP Vertex AI offers Grok 4.1 Fast with pay-as-you-go pricing at $0.20/1M input tokens. Vertex AI is Google Cloud's managed AI platform, offering access to Gemini models and hundreds of partner models alongside tools for fine-tuning, grounding, vector search, and end-to-end MLOps pipelines.
Compare Grok 4.1 Fast across 5 providers to find the best fit for your use caseInput / 1M
$0.20
Output / 1M
$0.50
Cache
read $0.050
Batch
Not sourced
Setup recipe
Python + curlInstall
pip install google-cloud-aiplatformAuth
export GOOGLE_CLOUD_PROJECT=...Call
import os
import vertexai
from vertexai.generative_models import GenerativeModel
vertexai.init(project=os.environ["GOOGLE_CLOUD_PROJECT"], location="us-central1")Model ID
grok-4.1-fastRequest example
import os
import vertexai
from vertexai.generative_models import GenerativeModel
# Reads GOOGLE_CLOUD_PROJECT from env; authenticates via Application Default Credentials
vertexai.init(project=os.environ["GOOGLE_CLOUD_PROJECT"], location="us-central1")
model = GenerativeModel("grok-4.1-fast")
response = model.generate_content("Hello")
print(response.text)Gotchas
- For Google-published models use the model name directly, e.g. "gemini-2.0-flash-001". For third-party publishers (Anthropic, Meta, etc.) use the full publisher path, e.g. "publishers/anthropic/models/claude-3-5-sonnet-v2@20241022".
- The examples expect GOOGLE_CLOUD_PROJECT; rename it only if your application config maps the new variable.
Compare Grok 4.1 Fast Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| OpenRouter | $0.20 | $0.50 |
| xAI Console | — | — |
| Microsoft Foundry | $0.20 | $0.50 |
| GCP Vertex AI | $0.20 | $0.50 |
| Vercel AI Gateway | $0.20 | $0.50 |
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $0.20 |
| Output tokens | $0.50 |
Capabilities
VisionMultimodalReasoningJSON / Tool useStructured Outputs
About Grok 4.1 Fast
Ultra-low latency Grok 4.1 Fast API family. xAI retired grok-4-1-fast-reasoning and grok-4-1-fast-non-reasoning on 2026-05-15; requests now redirect to Grok 4.3 at Grok 4.3 pricing.
Model Specs
Released2025-11-19
Context2M