spacexai

Grok 4.5

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

Replaces Grok 4.3: input $1.3125 → $2.1 per 1M (+60%), output $2.625 → $6.3 per 1M (+140%), context 1M → 500K, max output 1M → 500K.

text inputimage inputpdf inputtext outputlanguage

Use with MiniRouter View docs

1const response = await fetch('https://api.minirouter.sh/v1/chat/completions', {2  method: 'POST',3  headers: {4    Authorization: `Bearer ${process.env.MINIROUTER_KEY}`,5    'Content-Type': 'application/json',6  },7  body: JSON.stringify({8    model: 'spacexai/grok-4.5',9    messages: [{ role: 'user', content: 'Why is the sky blue?' }],10  }),11})12 13const data = await response.json()14console.log(data.choices[0].message.content)

Read docs →

Overview

Model type: language
Context window: 500,000
Maximum output: 500,000
Input / 1M tokens: $2.1
Output / 1M tokens: $6.3
Released: 2026-07-08

Prices include the MiniRouter fee. Compatibility snapshot: 2026-08-06. Input: text, image, pdf. Output: text.

Endpoints

/v1/chat/completions/v1/messages/v1/responses

Platform-funded routing only. Caller BYOK credentials and OIDC-based upstream authentication are intentionally excluded; authenticate with a MiniRouter bearer key.

Captured parameters: max_tokens, temperature, stop, tools, tool_choice, reasoning, include_reasoning.

API

Use the setup panel above to switch between Chat Completions, Messages, and client configurations. Every snippet keeps the model ID unchanged.

Base URLhttps://api.minirouter.sh/v1

Model IDspacexai/grok-4.5

Providers

MiniRouter selects from the configured routes below. Priority is the catalog order, not a latency or availability score.

Provider	Priority	Input / 1M	Output / 1M	Parameters	Access
vercel	1	$2.1	$6.3	max_tokens, temperature, stop, tools, tool_choice, reasoning, include_reasoning	MiniRouter balance