Grok 4.5
SpaceXAI's frontier mixture-of-experts model for coding, agentic tool use, and long-context knowledge work.
Overview
What is Grok 4.5
Grok 4.5 is SpaceXAI's proprietary frontier model for coding, agentic tasks, and knowledge work. It features a 500K-token context window, vision and tool-use capabilities, and configurable reasoning. Released in July 2026, it is optimized for software engineering and long-running workflows that require creative problem-solving.
Running it privately on Venice
On Venice, Grok 4.5 runs under a private, zero-retention tier — your prompts are not stored, profiled, or used for training. You get the full frontier model with vision, reasoning, web search, and function calling, billed per token without a subscription. Because it is a closed proprietary model, it carries the maker's standard content policies rather than being uncensored.
Assessment
Strengths and limitations
- 500K-token context window supports entire codebases and long documents without truncation.
- Native vision, function calling, reasoning, and web search for agentic and multimodal workflows.
- Code-optimized training for software engineering, debugging, and terminal-based tasks.
- Configurable reasoning effort to trade speed against depth on complex problems.
- Structured JSON output and multiple image inputs for building reliable automation pipelines.
- Closed proprietary weights: cannot be self-hosted or fine-tuned.
- Not an uncensored model; retains the maker's content policies and safety filters.
- Higher per-token cost than open-weight alternatives such as DeepSeek V3.2 or Kimi K2.6.
- EU API availability via the native provider is pending as of July 2026 (Venice access is unaffected).
Capabilities
What it supports
- Tool use / function calling
- Vision (image input)
- Reasoning
- Web search
- Code-optimized
- Structured output (JSON schema)
- Audio input
- Video input
- Multiple image inputs
- Log probabilities
Specifications
Datasheet
- Maker
- SpaceXAI
- Released
- July 2026
- Architecture
- Mixture-of-experts
- Modality
- Text, image → text
- Open weights
- No — proprietary
- Context window
- 500K tokens
- Max output
- 32K tokens
- Capabilities
- Vision, Function calling, Reasoning, Web search, Code-optimized
- Privacy on Venice
- Private — zero retention
- Available on Venice since
- Jul 2026
API
Call it from your code
Venice exposes an OpenAI-compatible API. Point your base URL at Venice and pass the model id.
curl https://api.venice.ai/api/v1/chat/completions \
-H "Authorization: Bearer $VENICE_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "grok-4-5",
"messages": [{ "role": "user", "content": "Explain quantum tunneling simply." }]
}'Pricing
What it costs on Venice
Billed per token on Venice: $2.27 per 1M input tokens and $6.80 per 1M output tokens.
New Venice accounts include a free daily allowance and 500 welcome credits — no credit card required.
Alternatives
How it compares
| Model | Context window | Best for | Open weights | Price (Venice) |
|---|---|---|---|---|
| Grok 4.5 | 500K tokens | Coding & agentic tasks | No | $2.27 in · $6.80 out / 1M |
| Claude Opus 4.8 | 1M tokens | Long-context reasoning | No | $6 in · $30 out / 1M |
| DeepSeek V3.2 | 160K tokens | Cost-efficient coding | Yes | $0.33 in · $0.48 out / 1M |
| Kimi K2.6 | 256K tokens | Open-weight long context | Yes | $0.75 in · $3.50 out / 1M |
SpaceXAI's flagship code and agentic reasoning model with vision and tool use.
Use cases
What it is good for
- 01Large-scale code review and refactoring across 500K-token repositories.
- 02Agentic software engineering with tool use, autonomous debugging, and web search.
- 03Multimodal analysis of technical diagrams, screenshots, and UI mockups.
- 04Long-form research synthesis and cross-document reasoning over hundreds of pages.
- 05Knowledge-work automation in finance, legal, and data science workflows.
Prompting
Getting better results
Enable reasoning and function calling for complex, multi-step tasks that require planning.
Upload images of code, diagrams, or errors alongside text prompts for vision-assisted debugging.
Use the full context window to pass large files or entire directories in a single prompt.
Set reasoning effort to low for quick chat and high for deep architectural or mathematical analysis.
FAQ
Frequently asked questions
Grok 4.5 is SpaceXAI's proprietary frontier model released in July 2026 for coding, agentic tasks, and knowledge work. It offers a 500K-token context window, vision input, configurable reasoning, and function calling.
On Venice, Grok 4.5 costs $2.27 per 1M input tokens and $6.80 per 1M output tokens, with cached input at $0.57 per 1M. You pay per token with no subscription required.
No. Grok 4.5 is a proprietary closed-weight model, so it cannot be self-hosted or fine-tuned. If you need open weights, DeepSeek V3.2 or Kimi K2.6 are strong alternatives.
Yes. On Venice, Grok 4.5 supports function calling, multiple image inputs, reasoning, web search, and structured JSON output.
Choose Grok 4.5 for coding, agentic tool use, and 500K-context workflows at lower per-token cost. Choose Claude Opus 4.8 if you need a 1M context window and deepest reasoning for very long documents.
It runs under Venice's private, zero-retention tier. Your prompts are not stored, profiled, or used for training, giving you sovereignty over your data.
Grok 4.5 supports up to 500,000 tokens of context and can generate up to 32,000 tokens in a single response.
No. Grok 4.5 is not uncensored on Venice; it retains SpaceXAI's content policies and safety filters. For fully uncensored inference, explore open-weight alternatives such as DeepSeek V3.2.
Run Grok 4.5 privately
No prompt logging. No data used for training.