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SpaceXAI: Grok 4.5

Source description (English)

Grok 4.5 is a model from SpaceXAI with frontier performance on coding, knowledge work, and STEM.

Overview

Model specifications

Context
500,000 tokens
Maximum output
450,000 tokens
Architecture
text+image+file->text
Tokenizer
Grok
Knowledge cutoff
Not provided
Moderated
No
OPENROUTER

Complete pricing

Synchronized OpenRouter rates. Token prices are shown per one million tokens.

Input
$2
per 1M tokens
  • ≤200K$2
  • >200K$4
Output
$6
per 1M tokens
  • ≤200K$6
  • >200K$12
Cache read
$0.3
per 1M tokens
  • ≤200K$0.3
  • >200K$0.6
Web search
$5
per 1,000 calls
API

Model configuration

Reasoning

Reasoning required
Yes
Default parameters
high
Capabilities
high, medium, low
API

Quick start

Set OPENROUTER_API_KEY locally. Python requires requests; JavaScript runs in Node.js. Keep the key on the server.

API documentation

curl --fail-with-body https://openrouter.ai/api/v1/chat/completions \
  -H "Authorization: Bearer $OPENROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"x-ai/grok-4.5","messages":[{"role":"user","content":"Hello!"}]}'
Capabilities

InputOutput

Input
textimagefile
Output
text
Reasoning

Yes · high · medium · low

API

Supported API parameters

include_reasoninglogprobsmax_tokensreasoningreasoning_effortresponse_formatseedstructured_outputstemperaturetool_choicetoolstop_logprobstop_p
Available providers

4 providers

Checked: September 7, 2026

Live providers on OpenRouter

Provider availability, latency, throughput and routing can change continuously. Open the source page for current operational data.

OpenRouter

xAI

Not provided
Context
500K
Maximum output
450K
Input
$2
Output
$6
Cache read
$0.3
Cache write
Not provided

xAI

Not provided
Context
500K
Maximum output
450K
Input
$2
Output
$6
Cache read
$0.3
Cache write
Not provided

xAI

Not provided
Context
500K
Maximum output
450K
Input
$4
Output
$12
Cache read
$0.6
Cache write
Not provided

xAI

Not provided
Context
500K
Maximum output
450K
Input
$4
Output
$12
Cache read
$0.6
Cache write
Not provided
x-ai

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