Requesty
xAI Corp.

grok-4.3

Grok 4.3 is a reasoning model from xAI. It accepts text and image inputs with text output, and is suited for agentic workflows, instruction-following tasks, and applications requiring high factual accuracy. Reasoning is always active and cannot be disabled or configured by effort level. It supports a 1 million token context window with no output token limit, making it well-suited for long-document analysis, deep research, and multi-step agentic tasks. Pricing is tiered: requests exceeding 200k total tokens are billed at a higher rate.

👁Vision🧠Reasoning🔧Tool calling⚡Caching
Try grok-4.3CompareDocs

Specifications

Context window1M tokens
Max output—
API typechat
AddedMay 1, 2026
Model IDxai/grok-4.3
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
$1.25
Output / 1M
$2.50
Cache write / 1M
$1.25
Cache read / 1M
$0.20
Estimated cost
100K input + 10K output$0.15
1M input + 100K output$1.50
10M input + 1M output$15.00

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-4.3.

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from 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-4.3",
    messages=[
        {"role": "user", "content": "Explain quantum computing in one paragraph."},
    ],
)

print(response.choices[0].message.content)

Other xAI Corp. models

grok-4.2-beta
2M ctx$2.00/1M
grok-4-1-fast-reasoning
2M ctx$0.20/1M
grok-4-1-fast-non-reasoning
2M ctx$0.20/1M
grok-3-mini
131K ctx$0.30/1M
grok-3
131K ctx$5.00/1M
SWE-Bench 58%
grok-3-mini:low
131K ctx$0.30/1M

Frequently asked questions

How much does grok-4.3 cost?
grok-4.3 is priced at $1.25 per million input tokens and $2.50 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-4.3?
grok-4.3 has a context window of 1M tokens. That's roughly 1,333 words of input you can fit in a single prompt.
What can grok-4.3 do?
grok-4.3 supports vision input, tool calling, extended reasoning, prompt caching. You can call it through any OpenAI-compatible client by pointing base_url to Requesty.
How do I use grok-4.3 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-4.3". The Quickstart above shows Python, JavaScript and cURL snippets.

Access grok-4.3 through Requesty

One API key, 400+ models, OpenAI-compatible. No markup on provider prices, automatic failover, and smart caching built-in.

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