SpaceXAI: Grok 4.5✓ Catalog verified
Grok 4.5 is a model from SpaceXAI with frontier performance on coding, knowledge work, and STEM.
Overview
Grok 4.5 is a model from SpaceXAI with frontier performance on coding, knowledge work, and STEM.
Access: available through the official xAI API. Context window: 500K.
Specifications
| API identifier | x-ai/grok-4.5 |
| Provider | xAI |
| Model type | Multimodal LLM |
| Context window | 500K catalog |
| Input modalities | text · image · file |
| Output modalities | text |
| Released | Jul 8, 2026 |
| Tokenizer | Grok |
| Moderated | No |
| Architecture modality | text+image+file->text |
Pricing
Live pricing components for x-ai/grok-4.5 as published in the catalog.
| Pricing component | Raw unit price | Normalized | Unit |
|---|---|---|---|
| Prompt tokens | $0.000002 | $2.00 / 1M | Per input token |
| Completion tokens | $0.000006 | $6.00 / 1M | Per output token |
| Request fee | N/A | N/A | Per request |
| Image fee | N/A | N/A | Per image unit |
| Web search fee | $0.005 | $0.005000 | Per search request |
Cost calculator
Estimate monthly spend from your own token volumes.
Estimated Total Cost
$2.2Calculated from current list pricing in the ModelsAtlas catalog.Capabilities
| Capability | Status | What it means |
|---|---|---|
| Visual Understanding | ✓ Supported | Image and document analysis support |
| Audio Processing | Not advertised | Speech and voice aligned flows |
| Tool Calling | ✓ Supported | Supports tools / function calling |
| Self-Hosting | Not advertised | Deploy outside managed APIs |
Capability signals
Directional signals derived from model metadata and capability tags — not official benchmark submissions.
Quick start
Call SpaceXAI: Grok 4.5 through an OpenAI-compatible client.
from openai import OpenAI
client = OpenAI(
base_url="https://openrouter.ai/api/v1",
api_key="YOUR_API_KEY"
)
response = client.chat.completions.create(
model="x-ai/grok-4.5",
messages=[{"role": "user", "content": "Explain quantum physics."}]
)
print(response.choices[0].message.content)Alternatives
Closest models by context window from a different provider.
| Model | Provider | Context | Input /1M | Actions |
|---|---|---|---|---|
| Dots Studio: Dots3-Note Preview (free) | Dots Studio | 512K | $0.00 | View → |
| NVIDIA: Nemotron 3 Ultra (batch) | NVIDIA | 512K | $0.60 | View → |
Sources & attribution
Pricing and metadata are maintained in the ModelsAtlas catalog.
Frequently asked questions
How much does SpaceXAI: Grok 4.5 cost?
$2.00 per 1M input tokens and $6.00 per 1M output tokens on the official xAI API.
What is the context window of SpaceXAI: Grok 4.5?
SpaceXAI: Grok 4.5 supports up to 500K tokens of context.
Does SpaceXAI: Grok 4.5 support tool / function calling?
Yes, SpaceXAI: Grok 4.5 supports tool / function calling — you can register tools and the model will emit structured tool calls.
How do I access SpaceXAI: Grok 4.5?
Use the official xAI API with the model id `x-ai/grok-4.5`. See the Quick start section above for code examples.