Grok 4.5

Co-trained with Cursor: tops agentic tool-calling benchmarks with roughly 4.2× the output-token efficiency of Opus 4.8.

Specifications

Item	Value
Model ID	`grok-4.5`
Vendor	xAI
Available on APIYI	2026-07-10
Knowledge cutoff	Not disclosed
Input modalities	Text, Image
Output modalities	Text
Context window	500,000 tokens
Billing	Usage-based

Pricing

Prices in USD per 1M tokens ($/1M).

Input	Cached input	Output
$2	$0.5	$6

The table shows list prices. Recharge promotions and group discounts stack; the console reflects the actual charge in real time. See Pricing and Recharge promotions.

Tiered pricing

This model is tier-priced by the token size of each request (output price = tier input price × output multiplier):

0 – 204,800 tokens: $2/1M input
Above 204,800 tokens: $4/1M input

Endpoints

Endpoint	Path	Supported
`OpenAI Chat Completions`	`POST /v1/chat/completions`	✅
`OpenAI Responses`	`POST /v1/responses`	✅
`Anthropic Messages`	`POST /v1/messages`	—
`Gemini Generate Content`	`POST /v1beta/models/{model}:generateContent`	—
`Image Generations`	`POST /v1/images/generations`	—
`Embeddings`	`POST /v1/embeddings`	—

Billing groups

Group	Multiplier	Notes
`Default`	1×	List price
`SVIP`	1×	List price

Some groups carry extra discounts, stackable with recharge bonuses. See Tokens and groups.

Supported features

Feature	Supported
Streaming	✅
Tool calling	✅
Structured outputs	✅
Vision	✅
Prompt caching	✅
Extended thinking	On by default
Web search	✅
Code execution	✅

Example request

The example below calls grok-4.5 through OpenAI Chat Completions (/v1/chat/completions). Point base_url at https://api.apiyi.com/v1 — everything else matches the official API.

curl https://api.apiyi.com/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $APIYI_API_KEY" \
  -d '{
    "model": "grok-4.5",
    "messages": [{"role": "user", "content": "Hello"}]
  }'

Read the key from an environment variable, never hard-coded. In production, issue separate tokens per use case so you can revoke and attribute usage individually.

Launch announcement

Background, benchmarks and migration notes for Grok 4.5

Grok Overview

Parameters, usage and best practices

Chat & Reasoning

Parameters, usage and best practices

Grok 4.3

Details for a model in the same family

Model pricing directory

Live pricing, endpoints and groups for all 308 models

Specs on this page are maintained by hand in models/data/model-details.json; pricing and endpoints come from the live pricing API, updated 2026-07-31 01:30 (UTC+8), specs last verified 2026-07-31.

Pricing Table

OpenAI

Anthropic

Google

xAI

Alibaba

ByteDance

Moonshot

Zhipu

MiniMax

Specifications

Pricing

Tiered pricing

Endpoints

Billing groups

Supported features

Example request

Launch announcement

Grok Overview

Chat & Reasoning

Grok 4.3

Model pricing directory

​Specifications

​Pricing

​Tiered pricing

​Endpoints

​Billing groups

​Supported features

​Example request

​Related docs

Launch announcement

Grok Overview

Chat & Reasoning

Grok 4.3

Model pricing directory

Specifications

Pricing

Tiered pricing

Endpoints

Billing groups

Supported features

Example request

Related docs