grok-4-fast-non-reasoning
xAI's latest advancement in cost-efficient reasoning models
🔧Tool calling⚡Caching🖥Computer use
Specifications
Context window2M tokens
Max output—
API typechat
AddedOct 16, 2025
Model IDxai/grok-4-fast-non-reasoning
Data retentionYes (30 days)
Used for trainingUnknown
Provider location🇺🇸 US
Privacy policyxAI Privacy Policy →
Benchmarks
Benchmarks haven't been published yet for this exact variant.
Some variants (region-specific deployments, highspeed tiers) share benchmarks with their base model — check the base model page or the xAI Corp. models overview.
Pricing
Input / 1M
$0.20
Output / 1M
$0.50
Cache write / 1M
$0.20
Cache read / 1M
$0.05
Estimated cost
100K input + 10K output$0.0250
1M input + 100K output$0.25
10M input + 1M output$2.50
Requesty charges exactly what the upstream provider charges — no markup, no per-request fees. Prompt caching and smart routing can reduce effective cost by 30-80%.
Quickstart
Drop-in compatible with the OpenAI SDK. Change the base URL, swap in your Requesty API key, and set the model to xai/grok-4-fast-non-reasoning.
123456789101112131415from openai import OpenAI client = OpenAI( api_key="YOUR_REQUESTY_API_KEY", base_url="https://router.requesty.ai/v1", ) response = client.chat.completions.create( model="xai/grok-4-fast-non-reasoning", messages=[ {"role": "user", "content": "Explain quantum computing in one paragraph."}, ], ) print(response.choices[0].message.content)
Other xAI Corp. models
Frequently asked questions
How much does grok-4-fast-non-reasoning cost?
grok-4-fast-non-reasoning is priced at $0.20 per million input tokens and $0.50 per million output tokens when accessed via Requesty. Prompt caching is supported, which can cut effective input cost by up to 90% on repeated context. Requesty charges exactly what the upstream provider charges — we don't add markup.
What is the context window of grok-4-fast-non-reasoning?
grok-4-fast-non-reasoning has a context window of 2M tokens. That's roughly 2,667 words of input you can fit in a single prompt.
What can grok-4-fast-non-reasoning do?
grok-4-fast-non-reasoning supports tool calling, prompt caching, computer use. You can call it through any OpenAI-compatible client by pointing base_url to Requesty.
How do I use grok-4-fast-non-reasoning with the OpenAI SDK?
Install the OpenAI SDK, set base_url to "https://router.requesty.ai/v1", set your API key to your Requesty key, and set the model to "xai/grok-4-fast-non-reasoning". The Quickstart above shows Python, JavaScript and cURL snippets.
Access grok-4-fast-non-reasoning through Requesty
One API key, 400+ models, OpenAI-compatible. No markup on provider prices, automatic failover, and smart caching built-in.