SpaceXAI: Grok 4.5✓ Catalog verified
Grok 4.5 is SpaceXAI's smartest model with frontier performance on coding, knowledge work, and STEM.
Overview
Grok 4.5 is SpaceXAI's smartest model with frontier performance on coding, knowledge work, and STEM.
Access: available through the official X Ai API. Context window: 500K.
Specifications
| API identifier | x-ai/grok-4.5 |
| Provider | X Ai |
| 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 |
API defaults
{
"top_k": null,
"top_p": null,
"temperature": null,
"presence_penalty": null,
"frequency_penalty": null,
"repetition_penalty": null
}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 |
|---|---|---|---|---|
| xAI: Grok Latest | ~x Ai | 500K | $2.00 | View → |
| NVIDIA: Nemotron 3 Ultra | 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 X Ai 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 X Ai API with the model id `x-ai/grok-4.5`. See the Quick start section above for code examples.