Grok 4 Fast

grok-4-fast by xAI Released September 19, 2025
ReasoningFunction callingStructured outputPrompt cachingWeb searchComputer useImage inputFile inputAudio inputVideo inputEU hostingFree endpointUp to % off
Input from
$0.2 / 1M
Output from
$0.5 / 1M
Cached input from
$0.05 / 1M
Context window
2M
Endpoints
1
from 1 providers
Regions
États-Unis

About Grok 4 Fast

Grok 4 Fast est le tout dernier modèle multimodal de xAI, offrant un rapport coût-efficacité de pointe et une fenêtre de contexte de 2 millions de tokens. Il se décline en deux versions : sans raisonnement et avec raisonnement.

Grok 4 Fast est un modèle conversationnel développé par xAI, disponible sur Eden AI via 1 endpoint chez 1 fournisseur, à partir de 0,2 $ par million de tokens en entrée et 0,5 $ par million de tokens en sortie, avec une fenêtre de contexte allant jusqu'à 2M tokens.

Providers and prices

1 endpoints from 1 providers, cheapest first, in USD per million tokens. Every one is called with the same Eden AI key: pin one with its endpoint ID, or let Eden AI route for you. .

Endpoint
Region
Context
Input / 1M
Output / 1M
Cached / 1M
Supports
xAI (États-Unis)Official−%xai/grok-4-fast
États-Unis
2M
$0.2$0.2
$0.5
$0.05
ReasoningToolsJSONCacheVisionWeb

Performance

Measured on real Eden AI traffic over the last 30 days. Endpoints with too little traffic are not shown.

Fastest first token
1.61 s
xAI (États-Unis)
Lowest latency
11.49 s
xAI (États-Unis)
Highest throughput
102.19 tok/s
xAI (États-Unis)
Best availability
100%
xAI (États-Unis)
Endpoint
First token
Latency p50
Latency p95
Throughput
Availability
Cache hits
Tool errors
JSON errors
xAI (États-Unis)
1.61 s
11.49 s
18.85 s
102.19 tok/s
100%
57.25%
0%
0%

Estimate your monthly cost

Enter your expected volume to compare every endpoint at once.

Call Grok 4 Fast with Eden AI

Use the model ID to let Eden AI pick an endpoint, or an endpoint ID from the table above to pin one.

import requests

response = requests.post(
    "https://api.edenai.run/v3/chat/completions",
    headers={"Authorization": "Bearer YOUR_EDENAI_API_KEY"},
    json={
        "model": "",
        "messages": [{"role": "user", "content": "Hello!"}],
    },
)
print(response.json())

Questions about Grok 4 Fast

On Eden AI, prices for this model start at $0.2 per million input tokens and $0.5 per million output tokens. Prices differ by endpoint; the providers table lists each one. .

Up to 2M tokens, depending on the endpoint.

1 endpoints from 1 providers, available in: États-Unis. All of them are called with the same Eden AI API key.

Yes. At least one endpoint is hosted in Europe; pin it with its endpoint ID from the providers table to keep requests in the EU.

Over the last 30 days, the fastest first token was 1.61 s (xAI (États-Unis)) and the highest throughput was 102.19 tokens per second (xAI (États-Unis)).