Grok 4.3
xAI Grok 4.3 — pricing, 1000k context window, API cost calculator and alternatives.
By xAI
Specs
- Provider
- xAI
- Slug
- x-ai/grok-4-3
- Capabilities
- vision, tools, json_mode
Pricing freshness
- Tier
- standard
- Currency
- USD
- As of
- 2026-05-08 17:08 UTC
Pricing history
Tracking Grok 4.3 pricing since 2026-05-08. We'll plot the chart here once it changes.
Quickstart — call Grok 4.3 from your app
curl https://openrouter.ai/api/v1/chat/completions \
-H "Content-Type: application/json" \
-H "Authorization: Bearer $OPENROUTER_API_KEY" \
-d '{
"model": "x-ai/grok-4-3",
"messages": [{"role": "user", "content": "Hello!"}]
}'Official docs: https://openrouter.ai/docs
# pip install openai
from openai import OpenAI
client = OpenAI(
base_url="https://openrouter.ai/api/v1",
api_key=os.environ["OPENROUTER_API_KEY"],
)
resp = client.chat.completions.create(
model="x-ai/grok-4-3",
messages=[{"role": "user", "content": "Hello!"}],
)
print(resp.choices[0].message.content)Official docs: https://openrouter.ai/docs
// npm install openai
import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://openrouter.ai/api/v1",
apiKey: process.env.OPENROUTER_API_KEY,
});
const resp = await client.chat.completions.create({
model: "x-ai/grok-4-3",
messages: [{ role: "user", content: "Hello!" }],
});
console.log(resp.choices[0].message.content);Official docs: https://openrouter.ai/docs
Related models
Similar capabilities, context window, and price tier — drawn from across the catalog so you can compare alternatives in one click.
Frequently asked questions
What is Grok 4.3?
Grok 4.3 is a large language model API from xAI with a 1M-token context window. It costs $1.25 per 1M input tokens and $2.5 per 1M output tokens.
How much does Grok 4.3 cost?
Grok 4.3 is priced at $1.25 per 1M input tokens and $2.5 per 1M output tokens via the xAI API. A 50/50 input/output workload of 1M total tokens costs about $1.875.
What is the context window of Grok 4.3?
Grok 4.3 supports up to 1M tokens of context per request — roughly 2000 pages of English text or 125000 lines of code at a typical density.
Does Grok 4.3 support vision, tool use, or JSON mode?
Grok 4.3 supports vision, tool/function calling, and structured JSON mode.
Who makes Grok 4.3?
Grok 4.3 is built and operated by xAI. Pricing, context window, and capabilities on this page are refreshed nightly from xAI's public catalog.
Can I self-host Grok 4.3?
Grok 4.3 is API-only — its weights are not publicly distributed by xAI, so it cannot be self-hosted today.