xAI

grok-4.3

Text
Retired Retired on 2026-09-28. Use grok-4.5 instead.

grok-4.3

Model health Insufficient data
runapi.ai
# Base URL
https://runapi.ai

# Endpoints
curl https://runapi.ai/v1/responses \
  -H "Authorization: Bearer $RUNAPI_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "grok-4.3",
  "input": "Review this rollout plan, identify the three highest-risk assumptions, and return a concise mitigation for each."
}'
from openai import OpenAI

client = OpenAI(
    base_url="https://runapi.ai/v1",
    api_key="your-runapi-key"
)

response = client.responses.create(
    model="grok-4.3",
    input="Review this rollout plan, identify the three highest-risk assumptions, and return a concise mitigation for each."
)
import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://runapi.ai/v1",
  apiKey: "your-runapi-key"
});

const response = await client.responses.create({
  model: "grok-4.3",
  input: "Review this rollout plan, identify the three highest-risk assumptions, and return a concise mitigation for each."
});
https://runapi.ai 0 endpoints

5 versions available

Specifications

Technical details

Provider xAI
Model ID grok-4.3
Modality Text
Task types Synchronous
Billing unit 1K tokens
Catalog status Retired
HOW IT WORKS

Use This Model in 3 Steps

  1. Get Your Key

    Sign up for free and create an API key for grok-4.3 from the dashboard.

  2. Send a Request

    POST to /v1/responses with the grok-4.3 model slug and your parameters.

  3. Get Results

    Read the completed grok-4.3 response directly from the endpoint.

What this model offers

Endpoint coverage

Exposes 1 public endpoint(s): response.

Usage-based billing

Metered by 1K tokens with no subscription requirement.

API REFERENCE

Endpoint Specification

Endpoint
POST /v1/responses
Model ID
grok-4.3
Task Types
response

Request parameters

No request parameters are published for this endpoint.

USE CASES

Customer support

Answer customer questions from a private knowledge base, reducing ticket volume.

Document analysis

Draft contract summaries and flag key clauses for attorney review.

Code generation

Auto-generate unit tests, code reviews, and refactoring suggestions in CI.

FAQ

Frequently asked questions about grok-4.3

How do I select grok-4.3?

Pass the model ID shown in the quickstart.

What's the rate limit on this variant?

Per-key rate limits scale with your usage tier. The pricing page shows current limits. If you need higher throughput, contact support to discuss tier upgrades.

Can I switch variants later?

Yes. Variant is a parameter in the request. Switch by changing the model ID — no code changes, no re-authentication, no separate billing setup. All variants share the same API key and request shape.

Does it stream?

Where streaming is available, RunAPI streams end-to-end. LLM models support token-level streaming. Media models use async task polling or webhook callbacks for result delivery.

Where do I report quality issues?

Open an issue on the public GitHub repo or email support at [email protected]. Include the task ID and model ID so the team can investigate the specific generation.

Do I need a separate provider account?

No. Your RunAPI API key is enough to access this variant and every other model in the catalog. You do not need accounts with the underlying provider.

Building with a team?

We're here to help with enterprise setup, integrations, and technical questions.

Contact Us