Grok 4.3

xAIChatIDGlobal
Grok 4.3 is a Grok model described by xAI as fast and reliable, with strong tool calling and instruction following, a 1M-token context window and text and image input; list price $1.25 in / $2.50 out per 1M tokens, provider list as at 1 November 2026.

Provider list price

Grok 4.3Per 1M tokens, as at 1 November 2026
Token typePrice
Input1.25
Output2.50
Cached input0.20
AUD is shown at a reference rate of 1 USD = 1.53 AUD; invoices use the rate on the day.

Your Seedrise rate is quoted per account against this list price. Request a rate card.

Specifications

Model IDgrok-4.3
ProviderxAI
TypeChat
Context window1M tokens (1,000,000)
Max outputNot listed
ModalitiesTextVisionToolsReasoning
RegionGlobal Provider global routing
EndpointsOpenAI Chat Completions: https://api.seedrise.ai/v1
Prices checked1 November 2026

Requests whose prompt reaches 200K tokens are billed by xAI at $2.50 in / $5.00 out and $0.40 cached for every token in the request. Global: runs on the provider's global routing; no Australian-region option as at 1 November 2026.

Strengths

  • Reasoning effort from none to xhigh, low by default
  • 1M-token context window, twice that of Grok 4.7
  • Function calling and structured outputs
  • Cached input lists at $0.20 per 1M tokens

Typical use cases

  • Tool-calling agents that need predictable instruction following
  • Long-document processing within 1M tokens
  • Customer support and operations assistants
  • Quick responses with reasoning switched off

Quickstart

A first request with curl. Replace sk-... with your Seedrise key.

curl
curl https://api.seedrise.ai/v1/chat/completions \
  -H "Authorization: Bearer sk-..." \
  -H "Content-Type: application/json" \
  -d '{"model":"grok-4.3","messages":[{"role":"user","content":"Hello"}]}'

OpenAI SDK, Python

python
from openai import OpenAI

client = OpenAI(base_url="https://api.seedrise.ai/v1", api_key="sk-...")

r = client.chat.completions.create(
    model="grok-4.3",
    messages=[{"role": "user", "content": "Summarise this contract in three bullets."}],
)
print(r.choices[0].message.content)

Where it runs

Global Served on the provider's global routing. Australian-region pinning is not on the rate card for this model; ask if you need it.

Questions about Grok 4.3

What is the model ID for Grok 4.3? +
Use grok-4.3 as the model field, with no vendor prefix, on the OpenAI-compatible endpoint at https://api.seedrise.ai/v1. GET /v1/models returns the IDs your key can call.
How does the Seedrise rate for Grok 4.3 compare to the list price? +
xAI's list price as at 1 November 2026 is US$1.25 per 1M input tokens and US$2.50 per 1M output tokens. Seedrise quotes rates per account against the provider's published list price for the same routing. Volume and committed tiers sit below list.
What is the context window and max output of Grok 4.3? +
Grok 4.3 has a context window of 1,000,000 tokens, per the provider documentation checked on 1 November 2026. Maximum output is not listed on our rate card; ask us for the current limit.
Can Grok 4.3 run in Australia? +
Not at present. Grok 4.3 is served on the provider's global routing. Models marked AU in the model library can be pinned to Sydney or Melbourne on request.
How does Grok 4.3 differ from Grok 4.7? +
Grok 4.3 has a larger 1M-token context window, can run with reasoning off and lists lower at $1.25 in / $2.50 out per 1M tokens. Grok 4.7 is xAI's frontier model for coding and agentic work, with a 500K-token window.
Does Grok 4.3 have a long-context surcharge? +
Yes. When a prompt reaches 200K tokens, xAI bills the whole request at $2.50 in / $5.00 out and $0.40 cached per 1M tokens.

Get a rate for Grok 4.3

Per-model rates in writing within one business day, then a console login and a trial key.

Request a rate card →