Last refreshed 2026-10-18. Next refresh: weekly.
Why use Grok 4.1 Fast on Vercel AI Gateway?
Vercel AI Gateway offers Grok 4.1 Fast with pay-as-you-go pricing at $0.20/1M input tokens. Vercel AI Gateway is a unified AI proxy providing a single OpenAI-compatible API endpoint to 275+ models from 25+ providers including Anthropic, OpenAI, Google, Meta, Mistral, DeepSeek, xAI, Alibaba, Amazon, ByteDance, Cohere, MiniMax, MoonshotAI, KwaiPilot, Black Forest Labs, Recraft, Voyage AI, NVIDIA, and more.
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 openaiAuth
export AI_GATEWAY_API_KEY=...Call
import os
from openai import OpenAI
client = OpenAI(
api_key=os.environ["AI_GATEWAY_API_KEY"],Model ID
spacexai/grok-4.1-fast-reasoningRequest example
import os
from openai import OpenAI
client = OpenAI(
api_key=os.environ["AI_GATEWAY_API_KEY"],
base_url="https://ai-gateway.vercel.sh/v1"
)
response = client.chat.completions.create(
model="spacexai/grok-4.1-fast-reasoning",
messages=[{"role": "user", "content": "Hello"}]
)
print(response.choices[0].message.content)Gotchas
- Use provider model ID "spacexai/grok-4.1-fast-reasoning", not the LLMReference slug "grok-4.1-fast".
- creator/model-name e.g. kwaipilot/kat-coder-pro-v2
- The examples expect AI_GATEWAY_API_KEY; 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.
Get Started
Model Specs
Released2025-11-19
Context2M