Last refreshed 2026-05-22. Next refresh: weekly.
Why use Grok 4.3 on Vercel AI Gateway?
Vercel AI Gateway offers Grok 4.3 with pay-as-you-go pricing at $1.25/1M 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 4.3 across 4 providers to find the best fit for your use caseSetup recipe
Python + curlpip install openaiexport AI_GATEWAY_API_KEY=...import os
from openai import OpenAI
client = OpenAI(
api_key=os.environ["AI_GATEWAY_API_KEY"],xai/grok-4.3Request 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="xai/grok-4.3",
messages=[{"role": "user", "content": "Hello"}]
)
print(response.choices[0].message.content)Gotchas
- Use provider model ID "xai/grok-4.3", not the LLMReference slug "grok-4.3".
- 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 4.3 Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| xAI Console | $1.25 | $2.50 |
| OpenRouter | $1.25 | $2.50 |
| Microsoft Foundry | — | — |
| Vercel AI Gateway | $1.25 | $2.50 |
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $1.25 |
| Output tokens | $2.50 |
| Query | $5.00 |
Capabilities
About Grok 4.3
xAI's Grok 4.3 is the current flagship API chat model for agentic tool calling and instruction following. xAI lists text and image input, text output, configurable reasoning, a 1,000,000 token context window, cached-input pricing, function calling, and structured outputs.
FAQ
What does Grok 4.3 cost on Vercel AI Gateway?
On Vercel AI Gateway, Grok 4.3 costs $1.25 per 1M input tokens and $2.5 per 1M output tokens.
What is the context window for Grok 4.3 on Vercel AI Gateway?
Grok 4.3 supports a 1,000,000 token context window on Vercel AI Gateway.
How does Vercel AI Gateway compare to other Grok 4.3 providers?
Grok 4.3 is available from 4 providers. The cheapest input pricing is $1.25/1M tokens from xAI Console.
What API model ID do I use for Grok 4.3 on Vercel AI Gateway?
Use the model ID xai/grok-4.3 when calling Vercel AI Gateway's API.
Who created Grok 4.3?
Grok 4.3 was created by xAI as part of the Grok 4 model family.
Is Grok 4.3 open source?
Grok 4.3 is not open source; the seed data lists it as proprietary.