Grok 4.6 is xAI’s (SpaceXAI) new frontier model that was launched on August 12th 2026. It is a direct improvement on Grok 4.5, with better performance on agents running for long periods, programming knowledge work, and interactive or visual projects, while maintaining the same 500,000-token price window and context window.
The model takes inputs of images and text and generates text. It is able to be configured for reasoning effort (low, medium, and high by default, and a new higher level of X high), as well as function calling and formatted outputs, Web searches, X search, as well as code execution. It was ranked at the top in the Artificial Analysis Intelligence Index with scores of 61, which is in line with GPT-5.6 Sol Max and trailing only the most advanced Claude model by a slim margin.
Quick Summary – Grok 4.6
- Released August 12, 2026 by xAI as a post-training upgrade over Grok 4.5
- Stronger at long-running agents, coding, knowledge work, and visual/interactive projects
- Same 500K context window and core pricing ($2 input / $6 output per 1M tokens)
- Scores 61 on Artificial Analysis Intelligence Index (matches GPT-5.6 Sol)
- Adds new “xhigh” reasoning effort level
- Available via xAI API, Cursor, Grok Build, Bedrock, Foundry, and other partners
- Best choice for most new agent/coding work; Grok 4.5 still useful for heavy-cache production systems
What Is Grok 4.6?
Grok 4.6 is an upgrade for post-training after Grok 4.5 instead of an entire scale-up of pretraining. According to the official descriptions, it was upgraded through the process of a more extensive supplementary training that used curated models to generate data for understanding and reasoning, top-quality engineering data, an enhanced optimizer, updated super-supervised fine-tuning (SFT) routes with Grok 4.5 itself, and a broader application of the use of agentic reinforcement across code, knowledge work, web development, kernel optimization along with computer-aided designing.
This results in a framework that remains consistent over many stages: analyzing new areas, structuring applications, creating fundamental interactions, iterating upon feedback, and doing more self-testing and verification than the earlier versions. xAI emphasizes stronger initial tests on interactive and visual projects.
The key confirmed specs (as of the August 12, 2026 launch and the subsequent document):
- Context window: 500,000 tokens
- Modalities: Image or text input; text output
- The reasoning effort: low, medium, high (default)
- Knowledge cutoff: February 1, 2026 (per developer docs)
- API model ID: grok-4.6
XAI hasn’t officially released the parameter count for this release. Third-party reports have referred to continuity with the previous ~1.5T base; however, consider this untrue.
Grok 4.6 Capabilities
Grok 4.6 is designed to be used by coding agents, long-term information work, and transforming general product ideas into functional applications.
The practical strengths include:
- Continuous multi-step workflows for agents (research analysis – analysis – implementation and refinement)
- Visual language to facilitate interactive projects
- Self-checking has been improved prior to advancing on longer routes
- Native tool uses functions calling the web, search, X, and code execution
- Configurable reasoning depth through the effort parameter
It’s the default model or the main model of Grok Build (xAI’s code agent-based environment) and is integrated into Cursor. Access to Enterprise has been extended into Amazon Bedrock, Microsoft Foundry, as well as Google’s Gemini Enterprise Agent Platform (Model Garden).
Safety evaluations were expanded for the release, with improved safeguards calibrated to the model’s capabilities while preserving utility for legitimate engineering, research, and vulnerability-related work.
Benchmarks
xAI published comparison results using the High Reasoning setting. Independent assessments from Artificial Analysis align closely.
Official figures selected (best scores in bold when they are reported):
| Evaluation | Grok 4.6 High | Grok 4.5 High | GPT-5.6 Sol Max | Fable 5 Max |
|---|---|---|---|---|
| AA Intelligence Index | 61 | 56 | 61 | 62 |
| GDPVal-AA v2 | 1753 | 1526 | 1728 | 1741 |
| CursorBench v3.2 | 69.9% | 66.7% | 67.2% | 70.5% |
| DeepSWE v1.1 | 65.9% | 54% | 73% | 70% |
| FrontierCode v1.1 (Extended) | 61.3% | 56.6% | 60.6% | 63.6% |
| APEX-Agents | 57.5% | 47.1% | 56.7% | 59.2% |
| Terminal-Bench v3.0 | 26% | 15.7% | 34.6% | 34.1% |
| APEX-SWE | 56.4% | 53.6% | — | 58.8% |
| AA-Briefcase | 1577 | 1313 | 1502 | 1574 |
| Harvey LAB (Vals) | 15.8% | 12.9% | 2.5% | 11.3% |
Grok 4.6 improves upon Grok 4.5 across each listed measurement. Improvements are notably high for coding and agentic software (DeepSWE +11.9 points, APEX-Agents +10.4 points, Terminal-Bench +10.3 points, and AA-Briefcase plus 264 Elo). It is located at the frontier with GPT-5.6 Sol while remaining more efficient in tokens for many long-term tasks, as per third-party analysis.
It is important to note that benchmark numbers could change with the update of the harness as well as prompt changes and the settings for reasoning. Always confirm the most recent figures for Artificial Analysis or the original system cards to make production decisions.
Pricing
API pricing is in line with Grok 4.5 prices in the headlines:
- Standard (prompt less than 200K tokens): $2.00 per million input tokens, $0.50 per million cached input tokens, $6.00 per million output tokens
- Long-context (prompt for at or over 200K tokens): $4.00 input / $1.00 cached $12.00 output (applies to the whole request)
- Fast variant: twice normal rates
A prompt cache is suggested to ensure reliable cache hits during multi-turn or agent-to-agent conversations. Pricing is similar across major partners like OpenRouter, Vercel, Cloudflare, Amazon Bedrock (Global profile), and more, although some platforms include their own markups or regional variations.
Access for consumers is included in SuperGrok subscription plans (starting at just $30/month at the date of the announcements about the launch) that also include the related Grok features like Imagine as well as voice. Higher tiers allow for greater access limits as well as more features. The exact plan’s inclusions may change. Check the most current Grok and SuperGrok price page.
Compared to peers of similar levels of intelligence, GROK 4.6 is promoted as a less expensive option, often cheaper per job than Claude Opus 5 or GPT-5.6 Sol when it comes to heavy output.
Availability
Grok 4.6 was launched on 12 August 2026. It will be accessible through:
- xAI API (console.x.ai) under model ID grok-4.6
- Grok Build along with Cursor (with the temporary 2x usage bonus for the beginning of the week)
- Partner platforms: OpenRouter, Vercel, Cloudflare
- Enterprise: Amazon Bedrock (including GovCloud), Microsoft Foundry, Gemini Enterprise Agent Platform
Chat users can access the service accessible through the Grok application, grok.com, and X (formerly Twitter) for SuperGrok users. Access to the region is based on xAI’s normal pattern (primarily US regions for the API when it was launched).
Grok 4.6 vs Grok 4.5
Both models share the same context window, the core models, and standard pricing for the API’s interface. The main distinctions are:
| Aspect | Grok 4.6 | Grok 4.5 |
|---|---|---|
| Context window | 500,000 tokens | 500,000 tokens |
| Core modalities | Text + image input → text output | Text + image input → text output |
| Standard API pricing | $2 / $6 per 1M tokens (input/output) | $2 / $6 per 1M tokens (input/output) |
| Cached input rate | $0.50 per 1M tokens | $0.30 per 1M tokens |
| Reasoning effort options | Low, medium, high, xhigh | Low, medium, high |
| Agentic & coding performance | Stronger results on published evaluations | Solid baseline performance |
| Focus | Longer trajectories + better visual/interactive first passes | General coding and agent tasks |
| Training improvements | Longer supplemental run, regenerated SFT, expanded RL | Previous training baseline |
| Recommended use | Preferred starting point for most new agent or coding work | Suitable for existing tuned production systems (especially cache-heavy traffic) |
Who Should Use Grok 4.6?
Developers working on software agents for coding and multi-step research pipelines, and interactive app prototypes will experience the clearest advantages. Teams that are evaluating frontier models for cost-efficiency and long-term tasks will also discover it to be competitive. Chat users who are casual on SuperGrok get the upgraded model as part of their subscription.
The limitations to be aware of: The knowledge cutoff date is in early 2026 (real-time tools can mitigate this). Vision is input-only, and long-context pricing increases by a factor of 200K once the threshold is reached. As with any constantly evolving model, make sure you check current rates along with regional support and the exact behavior of the tool in official documents prior to large-scale deployment.
What Are the Limitations of Grok 4.6?
Despite its excellent benchmark performance, Grok 4.6 is not without its flaws.
Benchmark Scores Are Not Universal
A high score in a benchmark for coding doesn’t guarantee the highest outcomes for your specific project.
The official results show that Grok 4.6 has the upper hand in certain evaluations, while rival models take the lead in others.
API Costs Can Increase for Long Contexts
The price of $2/$6 applies to the standard short-context API use.
Requests that involve more than 200,000 tokens use higher prices: four tokens for each million input and 12 cents for each million tokens output.
Developers working on large context windows must monitor consumption of tokens with care.
Higher Reasoning Can Cost More
The workload that is heavy on reasoning may require more computing and raise latency and overall use.
It is typically more efficient to match the effort of reasoning to the task’s complexity, instead of automatically choosing the most difficult level.
AI-Generated Code Still Requires Testing
Grok 4.6 is able to write and modify software, but the code must be reviewed and tested prior to deployment in production.
This is particularly important in situations where an agent has access to other tools like APIs, databases, and production systems.
How to Get Better Results From Grok 4.6?
A capable model still benefits from a good workflow.
Give the Model a Clear Objective
Instead of:
“Build a website.”
Try:
“Build a responsive SaaS landing page with a hero section, three pricing cards, a feature comparison table, FAQ section and mobile navigation. Use a clean white interface and keep the layout accessible.”
Specific objectives give an agent clearer constraints.
Break Large Tasks Into Milestones
For complex projects, ask the model to:
- Analyze the requirements.
- Create a plan.
- Implement the first version.
- Test it.
- Identify problems.
- Improve the implementation.
This makes it easier to inspect the work and correct mistakes.
Break Large Tasks Into Milestones
For complex projects, make sure the model is:
- Examine the needs.
- Plan it out.
- Introduce the initial version.
- Try it.
- Recognize the issues.
- Enhance the way in which you implement.
This makes it much easier to check what was done and rectify any mistakes.
Use the Appropriate Reasoning Level
Utilize lower reasoning settings for simple tasks, and reserve higher reasoning settings for more complex coding or research. Also, you can plan and make.
This can reduce cost and latency.
Use Prompt Caching for Repeated Context
For API applications that involve multiple conversations or large amounts of shared context, SpaceXAI recommends using a prompt cache key to improve cache reliability and cut down on unnecessary input expenses.
Verify Important Outputs
For production software such as security-sensitive work, financial analysis, and factual research, think of your model more as an aid instead of an absolute authority.
Conclusion
Grok 4.6 delivers a meaningful capability step on long-running agents, coding, and interactive work at the same core price and context length as Grok 4.5.
Its frontier-level intelligence combined with competitive token pricing makes it a strong option for developers and teams building ambitious multi-step applications.
For the latest details on rates, rate limits, and integrations, consult the official xAI documentation and model announcement, as AI product details continue to evolve.
Frequently Asked Questions (FAQs)
1. Does Grok 4.6 cost-free?
No. API usage is charged per token. Access to the API for consumers requires a SuperGrok subscription or a similar paid plan. A limited amount of free access is available through Grok’s website for basic queries. However, all plans with full features and greater limits are available for a fee.
2. What’s the window of context for Grok 4.6?
500,000 tokens. Requests with prompts exceeding 200k tokens are charged at a higher rate for long context for all tokens included in the request.
3. What does Grok 4.6 compare with GPT-5.6 Sol or Claude models?
It is in line with GPT-5.6 Sol on the Artificial Analysis Intelligence Index (61), with significantly lower token costs, and also shows leading or competitive results for several knowledge-based agent and code benchmarks. Claude models are still leading on some pure intelligence as well as certain code suites.
4. Does Grok 4.6 support images?
Yes, image input is possible along with text. The output remains text.
5. What is the best way to find the Grok 4.6 API?
By using the xAI console, OpenRouter, Vercel, Cloudflare, Amazon Bedrock, Microsoft Foundry, and other named partners. Use model ID grok-4.6.
6. Have the prices changed since the launch?
Headline rates are $2/$6 (standard) in early September 2026. Always verify the current pricing page, since long-context levels, cache rates, and markups for partners can be changed.
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