Grok AI &
4.20 Beta Explained
Elon Musk’s xAI built the only frontier model with native real-time access to X — and the cheapest frontier-class API on the market. Here’s everything you need to know about Grok in 2026: every model, all pricing, the X data advantage, and what Grok 4.20 Beta’s 4-agent system actually does.
Chat With Grok Right Now
Grok is free at grok.com — no account required for basic use. Click to open it in a new tab, or use the prompt ideas below to get the most from Grok’s real-time X data and reasoning capabilities.
Grok lives on X —
free to use at grok.com
Like Gemini, Grok doesn’t offer an embeddable third-party widget. It’s designed to run on xAI’s servers at grok.com or inside the X platform. The free tier gives you access to Grok 4 and 4.1 with limited daily messages — no credit card needed.
Open Grok Free →Clicking any prompt card opens Grok in a new tab · Copy the prompt to paste in
Every Grok Model
Explained
From the conversational powerhouse Grok 4.1 to the experimental 4-agent Grok 4.20 Beta and the specialist Heavy tier — here’s exactly what each model does.
xAI’s most experimental and architecturally novel model. Grok 4.20 Beta introduces a 4-agent parallel collaboration system — four specialised AI agents (Grok, Harper, Benjamin, and Lucas) debate and fact-check each other in real time before synthesising a single high-quality response. This isn’t multi-model calling — it’s genuine internal deliberation between agents on every query. The model also uses a “rapid learning” architecture that updates weekly from user feedback, making it the first Grok to continuously improve post-deployment. Select “Grok 4.2” in the model menu to activate it.
- 4-agent parallel system — agents debate before answering
- Rapid learning architecture — improves weekly from feedback
- Medical document analysis via photo upload
- Improved engineering reasoning over Grok 4.1
- 65% hallucination reduction vs Grok 4 base (carried from 4.1)
- Scores 48 on Artificial Analysis Intelligence Index (vs median 28)
- API: $2.00/$6.00 per MTok · 2M token context
The model that put Grok at the top of the industry leaderboard. Grok 4.1 Thinking (code name: quasarflux) holds #1 overall on LMArena’s Text Arena with 1,483 Elo — a 31-point margin over the next non-xAI model. Grok 4.1 non-thinking (tensor) ranks #2 at 1,465 Elo, meaning it surpasses every other model’s full-reasoning configuration. This is the first AI model to simultaneously top both thinking and non-thinking categories. It was trained using large-scale RL on non-verifiable rewards including style, helpfulness, and interpersonal intelligence — a fundamentally different training signal from benchmark-optimised models.
- 1,483 Elo (Thinking) — #1 LMArena overall
- Non-Thinking: 1,465 Elo — #2, beats all other thinking models
- 65% hallucination reduction vs Grok 4 (12.09% → 4.22%)
- Leads EQ-Bench3 — emotional intelligence and interpersonal skill
- Real-time X integration — live data on every query
- 2M token context window (Fast variant)
The maximum-compute version of Grok 4, designed for the hardest reasoning tasks where compute limits are lifted. Available exclusively to SuperGrok Heavy ($300/month) subscribers. At release in July 2025, Grok 4 Heavy scored 96.7% on HMMT25 (math tournament), 100% on AIME 2025, and 88.4–88.9% on GPQA graduate science — outperforming Claude Opus (at the time), Gemini 2.5 Pro, and GPT-4o on all four tests. It was xAI’s answer to test-time compute scaling as a product feature.
- 100% on AIME 2025 math competition
- 96.7% on HMMT25 — top math tournament benchmark
- 88.4–88.9% on GPQA graduate-level science
- Extended thinking and multi-agent capabilities
- 428K token memory — longest available context
- Exclusive to SuperGrok Heavy ($300/month)
The workhorse for production API workloads. Grok 4.1 Fast delivers near-frontier capability at $0.20/$0.50 per million tokens — the lowest price of any frontier-tier model from a major lab. It scores 64 on Artificial Analysis’s Intelligence Index (matching nearly the same quality as Grok 4 at 65) at 1/15th the price. It also has the largest context window in production use: 2 million tokens — enough for millions of words or entire large codebases. Available in reasoning and non-reasoning variants.
- $0.20/$0.50 per MTok — cheapest frontier-class API
- 2M token context — largest production context window
- Intelligence Index: 64 — near-identical to Grok 4 (65)
- Reasoning and non-reasoning variants available
- Built-in X live search, web search, code execution
- 75% cached token discount + 50% Batch API discount
xAI’s specialist agentic coding model — designed for developer workflows requiring fast reasoning over code. Optimised specifically for code comprehension, debugging, test generation, and multi-step agentic coding loops. Available via the xAI API and integrated into tools like Microsoft Copilot Studio. Paired with Grok 4.1 Fast’s 2M token context, it can reason across entire large codebases in a single pass.
- Specialist model optimised for agentic coding tasks
- Fast inference — designed for coding loop efficiency
- Available via API and Microsoft Copilot Studio
- Pairs with Grok 4.1 Fast for 2M token codebase analysis
- Supports parallel tool calls and code execution
Which model should I use? For API work at scale: Grok 4.1 Fast — cheapest frontier model, 2M context, near-Grok-4 quality. For conversational quality: Grok 4.1 Thinking — #1 on LMArena. For hard math/science: Grok 4 Heavy (SuperGrok Heavy only). For experimental multi-agent reasoning: Grok 4.20 Beta. For coding: Grok Code Fast 1.
All Grok Plans
Compared
Three ways to access Grok — direct subscriptions, X platform bundles, and the API. Plus the cheapest frontier-class API pricing in the industry.
Limited daily messages. Grok 3 / 4 access. Aurora image generation.
X platform features + more Grok queries. Blue checkmark included.
Full Grok 4 and 4.1, DeepSearch, Grok 4.20 Beta, Imagine, voice.
SuperGrok features bundled with ad-free X and priority access.
Grok 4 Heavy — the maximum compute tier. 100% AIME 2025.
Grok 4.1 Fast — cheapest frontier API. $25 free credits on signup.
Full API Pricing — All Grok Models
Batch API gives 50% discount. Cached tokens up to 75% cheaper. Tool calls $2.50–$5 per 1,000 invocations.
| Model | Release | Input /MTok | Output /MTok | Context | Notes |
|---|---|---|---|---|---|
| grok-4.20-beta (reasoning) | Feb 2026 | $2.00 | $6.00 | 2M | 4-agent system · public beta |
| grok-4.1 / grok-4.1-fast | Nov 2025 | $0.20 | $0.50 | 2M | Best value — cheapest frontier API |
| grok-4 | Jul 2025 | $3.00 | $15.00 | 256K | Standard flagship reasoning |
| grok-4-fast | Jul 2025 | $0.80 | $4.00 | 2M | Fast tier · large context |
| GPT-5.4 (for reference) | — | $5.00 | $20.00 | 256K | 25× more expensive than 4.1 Fast |
Cost reality: At $0.20/MTok, processing 1 million tokens with Grok 4.1 Fast costs 20 cents. The same volume with GPT-5.4 costs $5.00 — 25× more. With the 2M token context window, Grok 4.1 Fast is the only model that can process entire large codebases at frontier quality for pennies.
Every Grok Feature
Explained
Real-Time X Integration
Grok’s defining capability: native, always-on access to the X (formerly Twitter) firehose. Every Grok query can pull live posts, trending discussions, breaking news, and real-time sentiment — not via web search but directly from the platform’s data stream. No other frontier model has this. For market intelligence, trend tracking, and current events, it puts Grok in a category of one.
4-Agent Parallel System (4.20 Beta)
Grok 4.20 Beta’s headline innovation: four specialised AI agents — Grok, Harper, Benjamin, and Lucas — think in parallel and debate each other in real time before synthesising a final answer. Unlike multi-model calling (separate APIs aggregated externally), these agents engage in multiple rounds of internal discussion, questioning, and fact-checking before outputting. The result is meaningfully higher accuracy on complex problems.
DeepSearch
Grok’s extended research mode — performs multiple live web and X searches, reasons across results, and produces a comprehensive cited response. Available on SuperGrok and higher plans. Unlike standard web search, DeepSearch synthesises across sources rather than just returning links. Paired with X data, it can research a breaking story with live context no other research tool has access to.
Big Brain Mode
Grok’s extended reasoning mode for multi-step hard problems — activates longer chains of thought for complex logical, mathematical, or engineering questions. Available on SuperGrok and higher. The equivalent of Claude’s Extended Thinking or GPT-5.2’s Thinking tier, but accessible at a lower price point ($30/month SuperGrok vs $100/month for most competitors’ deep-reasoning plans).
Grok Imagine (Aurora)
Image and video generation powered by Aurora (xAI’s own image model) and FLUX.1 from Black Forest Labs. Aurora generates images in under 5 seconds. Video generation via Grok Imagine Video produces 6-second animated audiovisual clips at $0.05/second — notably cheaper than competitors at $0.10+/second, though quality lags behind Sora 2 and Kling 3.0. Available on SuperGrok and higher.
Voice Mode & Tesla Integration
Grok Voice API is generally available for developers. Consumer voice mode is available in the app with extended sessions on SuperGrok. Uniquely, Grok is integrated directly into Tesla vehicles — press the steering wheel voice button to navigate, answer questions, or interact with Grok hands-free. The US Department of Defense’s GenAI.mil platform also integrates Grok for 3 million personnel.
Minimal Censorship Policy
xAI designed Grok around “maximum truth-seeking” principles. Compared to OpenAI and Anthropic models, Grok is significantly more willing to engage with controversial, political, and sensitive topics directly — answering questions the other models would deflect or refuse. It still refuses genuinely harmful requests (weapons, CSAM, etc.) but has a narrower refusal policy on content that’s merely controversial.
2M Token Context (4.1 Fast)
Grok 4.1 Fast and 4 Fast models support a 2 million token context window — the largest in production deployment. That’s approximately 1.5 million words, entire large codebases, or multiple hours of transcript. Crucially, at $0.20/MTok, processing a full 2M-token prompt with Grok 4.1 Fast costs 40 cents. The same with other models supporting 1M context would cost $5–$15+.
Rapid Learning Architecture (4.20)
Grok 4.20 is the first AI model to improve continuously after deployment. Its “rapid learning” architecture incorporates user feedback and updates capabilities on a weekly cadence — unlike static models that require full retraining cycles. Musk confirmed release notes accompany every weekly update, making 4.20 the first in the Grok series to iterate in near real-time post-launch.
What to Use Grok
For — With Prompts
Grok’s strongest use cases in 2026, with example prompts you can copy and use right now.
Real-Time News & Trend Analysis
Grok’s single biggest edge: live access to X. For anything where recency matters — breaking news, market events, product launches, sports, political developments — Grok can see what’s happening right now, not just what was on the web before its training cutoff.
Market Intelligence & Finance
Grok 4.20’s 4-agent system won Alpha Arena — a live stock trading simulation — with 10–12% average returns (the only profitable AI in the competition). Grok’s X access gives it real-time sentiment signals that traditional financial AI doesn’t have. For market research, earnings monitoring, and sector tracking, it has a genuine information edge.
Large Codebase Analysis
With Grok 4.1 Fast’s 2M token context at $0.20/MTok, processing an entire large codebase in one pass costs cents rather than dollars. For teams with massive repositories, this is the most cost-efficient way to run codebase-wide analysis, dependency audits, security reviews, and refactor planning.
Hard Math & Science (Grok 4 Heavy)
For subscribers to SuperGrok Heavy, Grok 4 Heavy’s 100% AIME 2025 and 88.7% GPQA science scores represent some of the best publicly-available performance on hard quantitative reasoning. For researchers, engineers, and scientists working on genuinely difficult problems, Heavy is the right tool.
Uncensored Research & Writing
Grok’s narrower refusal policy makes it genuinely useful for topics where other models refuse, hedge excessively, or add unsolicited warnings. For security researchers, journalists, historians, fiction writers, and policy analysts working with sensitive material, Grok engages more directly.
Image Generation (Grok Imagine)
Aurora image generation is available on SuperGrok and higher, generating images in under 5 seconds. Unlike some competing models, Grok Imagine has fewer restrictions on generating realistic-looking content, creative interpretations, and edge-case subject matter. Available directly within the Grok interface — no separate tool or subscription needed.
Grok vs ChatGPT vs Claude
Side by Side
| Feature | Grok (4.1 / 4.20) | ChatGPT (GPT-5.4) | Claude Opus 4.6 |
|---|---|---|---|
| Free tier | ✓ Yes (daily limits) | ✓ Yes (limited) | ✓ Yes (limited) |
| Paid from | $30/mo (SuperGrok) | $8/mo (Go) | $20/mo (Pro) |
| LMArena Elo (best) | 1,483 (Grok 4.1 Thinking — #1) | ~1,452 | ~1,448 (Sonnet 4.6) |
| API input price (cheapest) | $0.20/MTok (4.1 Fast) | $5.00/MTok (5.4) | $3.00/MTok (Sonnet 4.6) |
| Context window | 2M tokens (4.1 Fast) | 256K chat / 1M API | 1M tokens |
| Real-time X/Twitter data | ✓ Native — always on | ~ Web search only | ~ Web search only |
| Image generation | ✓ Aurora / FLUX.1 | ✓ DALL·E | ✗ Not available |
| Video generation | ~ 720p max, cheaper ($0.05/s) | ✓ Sora 2 (1080p) | ✗ Not available |
| Multi-agent system | ✓ 4-agent (Grok 4.20) | ~ Limited | ✓ Agent Teams (Opus 4.6) |
| Censorship / refusal policy | ✓ Narrower — truth-seeking | ~ Moderate restrictions | ~ Moderate restrictions |
| Autonomous task horizon | Not published | Not published | 14.5hr 50% (METR) |
| Voice mode | ✓ Voice + Tesla integration | ✓ Advanced Voice | ~ Limited |
| Data privacy (API) | ~ Standard US T&Cs | ~ Standard US T&Cs | ✓ No training on Team+ |
Grok leads on: LMArena conversational quality (#1), API cost (25× cheaper than GPT-5.4 on 4.1 Fast), context window (2M tokens), real-time X data, and minimal censorship. ChatGPT leads on: media generation quality (Sora 2), ecosystem breadth, and professional knowledge work (GDPval). Claude leads on: autonomous task duration (14.5hr), data privacy assurances, and writing quality.
How to Prompt Grok
For Best Results
Grok responds differently from Claude and ChatGPT. Here’s what to know to unlock its real-time data advantage and get consistent, high-quality output.
Trigger X Live Data Explicitly
Say What's happening on X right now about... or Search X for live reactions to... to activate Grok’s real-time data integration. Without this trigger, Grok may answer from its training data. With it, you get genuinely current information.
Use DeepSearch for Research
Prepend DeepSearch: to trigger Grok’s extended multi-search synthesis mode. This performs multiple web + X searches and reasons across results before answering — producing cited, comprehensive reports rather than single-source answers.
Request Big Brain Mode
For multi-step hard problems, say Use Big Brain Mode or simply Think through this deeply before answering. On SuperGrok and higher, this activates longer reasoning chains. Grok 4.20 Beta’s 4-agent system runs automatically without a trigger.
Be Direct — Grok Can Handle It
Unlike Claude or ChatGPT, Grok won’t add unsolicited safety caveats to most sensitive topics. You don’t need to frame or soften requests. Ask directly: Explain exactly how X works without worrying Grok will refuse or hedge unnecessarily.
Leverage the 2M Context
With Grok 4.1 Fast’s 2M token window, you can paste entire codebases, research corpora, or transcript archives. Don’t summarise — include everything. Grok excels at finding patterns across large volumes of text that shorter-context models would miss.
Switch to Grok 4.20 for Hard Problems
Select Grok 4.2 in the model menu when tackling complex multi-angle problems — strategy, analysis, engineering decisions, or anything that benefits from multiple perspectives. The 4-agent debate system genuinely improves output quality on these tasks.
Grok AI FAQ
Why can’t I chat with Grok directly on this page?
▼What is the latest Grok model?
▼What is the Grok 4.20 4-agent system?
▼Is SuperGrok worth it vs ChatGPT Plus?
▼How does Grok access X (Twitter) data?
▼What is Grok DeepSearch?
▼Who built Grok and who funds xAI?
▼Can developers use the Grok API?
▼base_url to https://api.x.ai/v1 and your API key, and most OpenAI SDK code works without modification. New users receive $25 in free promotional credits. Grok 4.1 Fast costs $0.20/$0.50 per million tokens — the cheapest frontier-class API available. Built-in tools include X search, web search, code execution, and document search at $2.50–$5 per 1,000 calls. Grok 4.20 Beta API availability is listed as “early access / coming soon” in official xAI documentation as of mid-March 2026.More Grok &
Prompt Engineering Resources
Grok Prompt Library
Ready-to-use prompts for X analysis, DeepSearch, Big Brain Mode, and real-time intelligence — all optimised for Grok’s capabilities.
ChatGPT vs Grok — Full 2026 Comparison
GPT-5.4 vs Grok 4.1: benchmarks, pricing, and a clear decision guide for which to use when.
Claude vs Grok — 2026 Guide
Claude Opus 4.6 vs Grok 4.1: autonomous tasks, writing quality, coding, and data privacy side-by-side.
Gemini vs Grok — 2026 Guide
Gemini 3.1 Pro vs Grok 4.1: reasoning benchmarks, real-time data, Google integration, and API costs.
AI News — Grok Updates
Every xAI model release, benchmark result, and product update — covered and fact-checked as it happens.
Complete Beginner’s Guide to Prompt Engineering
The fundamentals that work across Grok, Claude, ChatGPT, and Gemini — no experience needed.
Master Grok
With Better Prompts
You now know what makes Grok different, when it beats the competition, and exactly how to get the most from its real-time X data, DeepSearch, Big Brain Mode, and the 4-agent Grok 4.20 system.
Grok is free to use · No account required for basic access · Updated when new models launch
