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LLMS • CURATED • UPDATED JUL 9, 2026

Grok 4.5

xAI's flagship coding model, trained in partnership with Cursor

Grok 4.5 is xAI's flagship model, shipped July 8, 2026 with public rollout July 9. It has a 500K-token context window (with a high-context surcharge above 200K) and configurable reasoning effort (low/medium/high, defaulting to high). xAI trained it in partnership with Cursor specifically to handle long-running jobs across multiple repositories with minimal human intervention across hundreds of tool calls.

QUICK FACTS

Pricing Paid
Platforms web, api
API No
Open Source No
Modalities LLMs, IDEs & Coding Tools
Best For Best for Long-Running Coding Agents
Date Added 2026-07-09

QUICK TIPS

1 Use reasoning_effort=low for simple tasks to control cost
2 Take advantage of the Cursor-trained coding-agent behavior for multi-repo work
3 Watch for the high-context surcharge above 200K tokens
4 Use cached input pricing where your workflow repeats context
5 Design long-running agent tasks with clear checkpoints given its multi-tool-call design

SIMILAR TOOLS

Claude Opus 4.6 Google Antigravity 2.0 NotebookLM Cursor 2.0 OpenAI Codex

USE CASE EXAMPLES

Long-Running Multi-Repository Coding Agent

Run an autonomous coding agent across multiple repositories with minimal supervision.

STEPS:
  1. Connect Grok 4.5 to your repositories via API
  2. Define the overall task and constraints
  3. Set reasoning_effort based on task difficulty
  4. Let the agent execute across hundreds of tool calls
  5. Review checkpoints and final output
  6. Run tests before merging any changes

Cost-Tuned General Reasoning

Balance reasoning quality against cost using the configurable effort setting.

STEPS:
  1. Identify the task's actual difficulty
  2. Set reasoning_effort to match (low/medium/high)
  3. Run the task and review output quality
  4. Adjust effort level if quality doesn't meet expectations
  5. Track cost per task across effort levels

PRICING

Paid

Requires a paid subscription.

📚

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EXPLORE ALTERNATIVES

View Grok 4.5 Alternatives (2026) →

Compare Grok 4.5 with 5+ similar llms AI tools.

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FREQUENTLY ASKED QUESTIONS

Q

Is Grok 4.5 free?

A

No, Grok 4.5 requires a paid subscription.

Q

Does Grok 4.5 have an API?

A

No, Grok 4.5 does not appear to offer a public API.

Q

What is Grok 4.5 best for?

A

Grok 4.5 is best for Best for Long-Running Coding Agents.

Q

What platforms does Grok 4.5 support?

A

Grok 4.5 supports web, api.

Q

Is Grok 4.5 open source?

A

No, Grok 4.5 is not open source.

Q

What can I do with Grok 4.5?

A

Grok 4.5 is designed for Long-running multi-repo coding agents, Minimal-supervision autonomous workflows, General-purpose reasoning and chat. Grok 4. Key strengths include 53.8% on the Artificial Analysis Intelligence Index (rank 7 overall) and Trained in partnership with Cursor for long-running coding agent tasks.

Q

How do I use Grok 4.5?

A

Grok 4.5 is a large language model for text generation, analysis, and conversation. Access through the web interface. Enter prompts or questions to get responses. It excels at 53.8% on the artificial analysis intelligence index (rank 7 overall).