Grok 4.5

Grok-4.5 is a frontier reasoning model by SpaceXAI optimized for agentic software engineering. It features a 500k context window and V9 architecture, delivering high-speed technical performance with 4x better token efficiency than rivals.

Modalities

Context

API Usage Examples

curl --request POST "https://gptproto.com/v1/chat/completions" \
  --header "Authorization: Bearer $GPTPROTO_API_KEY" \
  --header "Content-Type: application/json" \
  --data '{
    "model": "grok-4.5",
    "messages": [
      {
        "role": "user",
        "content": "Hello"
      }
    ]
  }'

Grok 4.5 pricing

Estimate a request with real work scenarios. GPTProto token pricing is 40% below official rates.

Cost calculator

Multi-turn agent with cached context.

Input tokens$1.2 / 1M$0.0018

Output tokens$3.6 / 1M$0.00288

Cache write tokens$0.3 / 1M$0.0009

Cache read tokens$0.3 / 1M$0.0075

Cost per request$0.01308

Top up

GPTProto vs official pricing.

Requests

You pay

40% off

$100

You receive$100.00

Save$66.66 (40%)vs Grok official

Related Models

All Models

Model					Input → Output
Grok 4.5Current		500K	$1.20 / $3.60 per 1M	$0.30 / $0.30 per 1M	Input: TextInput: Image Output: Text
GLM 5.3		1.05M	$1.26 / $3.96 per 1M	— / $0.23 per 1M	Input: TextInput: ImageInput: Document Output: Text
Gemini 3.7 Flash		1.05M	$0.45 / $2.25 per 1M	— / $0.04 per 1M	Input: TextInput: ImageInput: Document Output: Text
Grok 4.6		500K	$1.20 / $3.60 per 1M	— / $0.30 per 1M	Input: TextInput: Image Output: Text
Qwen3.8 Max		1M	$1.80 / $5.40 per 1M	$2.25 / $0.23 per 1M	Input: TextInput: ImageInput: VideoInput: Document Output: Text
Claude Opus 5		1M	$4.00 / $20.00 per 1M	$5.00 / $0.40 per 1M	Input: TextInput: ImageInput: Document Output: Text
Gemini 3.6 Flash		1.05M	$0.45 / $2.25 per 1M	— / $0.04 per 1M	Input: TextInput: ImageInput: Document Output: Text
Gemini 3.5 Flash Lite		1.05M	$0.18 / $1.50 per 1M	$0.02 / $0.02 per 1M	Input: TextInput: ImageInput: Document Output: Text
Kimi K3		1.05M	$2.70 / $13.50 per 1M	$0.27 / $0.27 per 1M	Input: TextInput: ImageInput: Document Output: Text
GPT 5.6 Luna		1.05M	$0.16 / $0.96 per 1M	$0.20 / $0.02 per 1M	Input: TextInput: ImageInput: Document Output: Text
GPT 5.6 Terra		1.05M	$1.60 / $9.60 per 1M	$2.00 / $0.16 per 1M	Input: TextInput: ImageInput: Document Output: Text
GPT 5.6 Sol		1.05M	$4.00 / $24.00 per 1M	$5.00 / $0.40 per 1M	Input: TextInput: ImageInput: Document Output: Text
Claude Sonnet 5		1M	$1.60 / $8.00 per 1M	$2.00 / $0.16 per 1M	Input: TextInput: Document Output: Text
MiniMax M3		1.05M	$0.48 / $0.96 per 1M	$0.10 / $0.10 per 1M	Input: TextInput: ImageInput: Document Output: Text
GLM 5.2		1.05M	$1.26 / $3.96 per 1M	$0.23 / $0.23 per 1M	Input: TextInput: ImageInput: Document Output: Text
Claude Fable 5		1M	$8.00 / $40.00 per 1M	$10.00 / $0.80 per 1M	Input: TextInput: Document Output: Text
Qwen3.7 Max		1M	$0.36 / $1.44 per 1M	$0.07 / $0.07 per 1M	Input: TextInput: Document Output: Text
DeepSeek v4 Flash	—	1.05M	$0.44 / $1.32 per 1M	— / $0.01 per 1M	Input: Text Output: Text
DeepSeek v4 Pro	—	1.05M	$1.32 / $3.96 per 1M	— / $0.04 per 1M	Input: Text Output: Text
Grok 4.3		1M	$0.75 / $1.50 per 1M	$0.12 / $0.12 per 1M	Input: TextInput: Image Output: Text
Kimi K2.6		262K	$0.85 / $3.60 per 1M	$0.14 / $0.14 per 1M	Input: TextInput: Document Output: Text
Grok 4.20 Beta 0309 Reasoning		2M	$0.75 / $1.50 per 1M	$0.12 / $0.12 per 1M	Input: TextInput: Image Output: Text
Grok 4.20 Beta 0309 Non Reasoning		2M	$0.75 / $1.50 per 1M	$0.12 / $0.12 per 1M	Input: TextInput: Image Output: Text
Grok 4.20 Multi Agent Beta 0309		2M	$0.75 / $1.50 per 1M	$0.12 / $0.12 per 1M	Input: TextInput: Image Output: Text
GLM 5.1		205K	$1.26 / $3.96 per 1M	$0.23 / $0.23 per 1M	Input: TextInput: Document Output: Text
DeepSeek v3.2		164K	$0.17 / $0.25 per 1M	$0.02 / $0.02 per 1M	Input: Text Output: Text
MiniMax M2.5		205K	$0.24 / $0.96 per 1M	$0.30 / $0.02 per 1M	Input: TextInput: Document Output: Text
Kimi K2.5		262K	$0.54 / $2.70 per 1M	$0.09 / $0.09 per 1M	Input: TextInput: Document Output: Text
Qwen Turbo		—	$0.04 / $0.18 per 1M	$0.009 / $0.009 per 1M	Input: Text Output: Text
Grok Code Fast 1		—	$0.12 / $0.90 per 1M	—	Input: Text Output: Text
Doubao Seed 1.6 Thinking (Build 250715)		262K	$0.10 / $0.97 per 1M	—	Input: TextInput: Image Output: Text
Doubao Seed 1.6 Thinking (Build 250615)		262K	$0.10 / $0.97 per 1M	—	Input: TextInput: Image Output: Text
Doubao Seed 1.6 Flash (Build 250615)		262K	$0.02 / $0.18 per 1M	—	Input: TextInput: Image Output: Text

Grok-4.5 Core Technical Features

The technical pillars that make Grok-4.5 a leader in agentic AI performance.

V9 Architecture Scale

A 1.5 trillion parameter foundation specifically tuned for STEM, engineering, and complex technical datasets.

Agentic Engineering Power

Cursor-native training enables superior terminal control and multi-step bug resolution in large codebases.

500k Context Window

Massive context support allows for the ingestion of entire repositories or lengthy legal and financial documents.

High-Throughput Serving

Reliable speeds of 80–93 tokens per second ensure your real-time applications remain responsive under load.

Grok-4.5 Frequently Asked Questions

Expert insights on deploying the Grok-4.5 model through our unified API platform.

How does Grok-4.5 handle complex coding tasks?

Grok-4.5 is optimized for terminal use and multi-step issue resolution. It scored 83.3% on Terminal Bench 2.1, proving its excellence in managing file systems and fixing bugs in large repositories.

What are the token costs for Grok-4.5?

Our pricing is highly competitive at $2.00 per 1M input tokens and $6.00 per 1M output tokens. You can also save 75% on cache hits with prompt caching and 50% via the Batch API.

Does Grok-4.5 support multimodal inputs?

Yes, Grok-4.5 provides native support for images and audio. This allows developers to build multimodal vision and voice-driven workflows with ultra-low latency.

Is my data used to train the Grok-4.5 model?

No. Our enterprise agreement with SpaceXAI ensures that no data sent through our API endpoints is used for training foundation models, maintaining strict privacy for your technical work.

How do I migrate to Grok-4.5 from GPT-5.5?

Migration is seamless as our API is 100% OpenAI compatible. Simply update your base URL and change the model parameter to grok-4.5 to start benefiting from higher token efficiency.

What is the reasoning_effort parameter?

This native parameter allows you to scale the internal Chain of Thought. Set it to 'high' for difficult logic tasks or 'low' for faster, more direct responses depending on your needs.