Grok 4.5

spacexai/grok-4.5

A chat model with a 500K-token context window, at $2.10 per million input tokens and $6.30 per million output tokens.

Details

Maker: spacexai
Kind: Chat
Context window: 500,000 tokens
Max output: 500,000 tokens
Input: $2.10 per million tokens
Cached input: $0.315 per million tokens, 85% off
Cache write: Same as input
Output: $6.30 per million tokens
Capabilities: Reasoning, tool use, vision, file input, web search
Takes: Text, image, pdf
Returns: Text
Zero data retention: Yes, on every provider
No training on requests: Yes, on every provider
Released: 2026-07-08

Description

SpaceXAI's smartest model with frontier performance on coding, knowledge work, and STEM.

Call it

curl

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

Set PHANTOM_KEY to your key. Any OpenAI client works with the base URL https://phantom.codes/v1.

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