Comparison
ChatGPT vs Grok
ChatGPT vs Grok in 2026 — how OpenAI's and xAI's flagship assistants compare on intelligence, coding, writing, real-time data, pricing, safety and ecosystem, and which one to choose.
Quick answer: For most people, ChatGPT is the better all-rounder — it has the broadest feature set, the deepest ecosystem, the most mature agents and a much stronger safety and enterprise record, running GPT-6 Astra on every paid tier since 5 September 2026. Grok is the better pick for real-time X (Twitter) data, cheap high-volume API reasoning and a direct, lightly filtered personality: it runs Grok 4.6, whose API costs $2/$6 per million input/output tokens against GPT-6 Astra’s $10/$50 (a fifth of the price on input and about an eighth on output), and adds voice companions no major rival ships. Both have a free tier. ChatGPT’s cheapest paid tier is $8/month (Go) and GPT-6 Astra starts at $20/month (Plus); Grok’s paid plans start at $10/month (SuperGrok Lite). Pick ChatGPT if you want one polished do-everything assistant with the higher-scoring flagship and enterprise-grade compliance; pick Grok if you want live social data, a much cheaper flagship API, or a looser assistant. Two caveats worth knowing: ChatGPT shows ads on its Free and Go tiers in a growing number of markets, including the US, UK, India and much of Europe, while Grok carries a 2026 deepfake and child-safety scandal and lacks the enterprise certifications ChatGPT holds.
At a glance
| ChatGPT | Grok | |
|---|---|---|
| Maker | OpenAI | xAI (a SpaceX subsidiary) |
| Paid model | GPT-6 Astra | Grok 4.6 |
| Free model | GPT-5.6 Luna (unlimited text chats) | Grok 4-class |
| Cheapest paid | Go $8 | SuperGrok Lite $10 |
| Flagship access | Plus $20 | SuperGrok $30 (Grok 4.6 on Lite unconfirmed) |
| Premium | Pro $100, $200 or $500 | SuperGrok Heavy $300 |
| Ads | Yes — Free & Go, in a growing number of markets | No in-app (X itself is ad-supported) |
| Best at | Breadth, ecosystem, agents, safety | Real-time X data, API price, personality |
| Image generation | Yes | Yes (paid only) |
| Video generation | Yes (Sora) | Yes (Grok Imagine) |
| Voice | Yes | Yes, plus AI companions (Ani, Valentine) |
| Web search | Yes (Search, Deep Research) | Yes (DeepSearch plus live X) |
| Agents / tasks | Yes (Agent Mode, Codex) | Yes (DeepSearch agent) |
| Real-time social data | No | Yes (X) |
| Custom bots | Custom GPTs (3M+) | No |
| Enterprise certifications | SOC 2 Type 2, ISO 27001 family | None |
| Users | ~1B monthly / 900M weekly | ~117M monthly |
The models behind them
On paid tiers, ChatGPT runs GPT-6 Astra, its flagship on Plus, Pro, Business and Enterprise since 5 September 2026, and Grok runs Grok 4.6, released on 12 August 2026. Both replaced short-lived predecessors: GPT-5.6 Sol was ChatGPT’s flagship from 9 July to 5 September and is still selectable, while Grok 4.6 succeeded Grok 4.5 and Grok 4.3. xAI released Grok 4.7 on 21 September 2026 on its API, in Cursor and in Grok Build, at the same $2/$6; it scores 46 on the independent index, two points above Grok 4.6.
The cleanest cross-vendor signal is the independent Artificial Analysis Intelligence Index, and here the gap is clear. On its re-based v4.3 scale, GPT-6 Astra scores 53, level with Claude Fable 5.1, while Grok 4.6 scores 44, level with Kimi K3 and behind GLM-5.3 (45) and GPT-5.6 Sol (47). Grok 4.6’s launch score of 61 was on the earlier scale and is not comparable. The two models have different shapes: GPT-6 Astra is the stronger generalist and scores 62 on Artificial Analysis’s Coding Agent Index, while Grok 4.6 trades some capability for a much lower price.
Here is how the two current flagships compare on the figures available:
| Benchmark | GPT-6 Astra | Grok 4.6 | Edge |
|---|---|---|---|
| AA Intelligence Index v4.3 (independent) | 53 (tied 1st) | 44 | GPT-6 Astra |
| SWE-bench (coding) | Not published | Not published | — |
| SWE-bench Pro, previous generation | 64.6% (GPT-5.6 Sol) | 64.7% (Grok 4.5, xAI-reported) | Tie |
| API price (input / output, per 1M) | $10 / $50 | $2 / $6 | Grok |
Two accuracy notes. Neither OpenAI nor xAI has published a SWE-bench figure for its current flagship, so coding standing rests on the independent indices rather than vendor scores; on the previous generation the two were level on SWE-bench Pro. And the GPT-5.5 and Grok 4.3 figures from earlier versions of this page are now two generations old: on the re-based index those models score 39 and 25. Vendor-run numbers are a ceiling; standardised leaderboards are a floor. For where every model ranks, see best AI models.
Pricing
Grok is much cheaper on the API; in the apps the two are closer than they look. ChatGPT’s cheapest paid tier is Go at $8/month, which runs GPT-5.6 Luna, and Plus at $20/month brings GPT-6 Astra. Grok’s paid plans start at SuperGrok Lite at $10/month, with the fuller SuperGrok at $30/month; Grok 4.6 access on Lite was not confirmed at launch. At the top, ChatGPT Pro is $100, $200 or $500/month, with 5x Plus usage and Pro reasoning powered by GPT-6 Astra (the $500 plan, added on 29 September 2026, carries 25x Plus usage), and Grok’s SuperGrok Heavy is $300/month (adding the multi-agent Grok 4 Heavy).
On the API the gap is wide. Grok 4.6 costs $2 / $6 per million input/output tokens, against $10 / $50 for GPT-6 Astra — a fifth of the price on input and about an eighth on output. OpenAI’s other models narrow the gap: GPT-5.6 Sol lists at $5 / $30 ($4 / $20 on a promotion running to at least 21 November 2026), GPT-5.6 Terra matches Grok on input at $2 / $12 but costs twice as much on output, and GPT-5.6 Luna undercuts Grok at $0.20 / $1.20, though it is not a flagship. Flagship against flagship, Grok wins clearly on per-token price.
The free tiers diverge on model and on ads. ChatGPT free runs GPT-5.6 Luna, its default since August 2026, with unlimited text chats, whereas Grok free runs older Grok 4-class models, not the current flagship, and no longer includes image generation. Since February 2026, ChatGPT shows ads on its Free and Go tiers, as labelled “Sponsored” boxes; its paid tiers stay ad-free. Grok’s standalone app shows no ads, though it is tied to X, which is ad-supported. For a stronger free model, ChatGPT’s GPT-5.6 Luna is ahead; for the cheapest paid tier, ChatGPT Go at $8 undercuts Grok’s $10 SuperGrok Lite.
Intelligence and reasoning
GPT-6 Astra is the stronger model on the independent evidence. On the re-based Artificial Analysis Intelligence Index it scores 53 against Grok 4.6’s 44, a nine-point gap that puts Grok in the middle of the current frontier pack. This page has no like-for-like science or Humanity’s Last Exam figures for the current pair; in July’s generation, GPT-5.5 led Grok 4.3 on both (93.6% to 90.1% on GPQA Diamond, 41.4% to 35.0% on Humanity’s Last Exam).
Grok 4.6’s genuine strength is capability for the price: at $2 / $6 per million tokens it scores above Claude Opus 4.8 (42) and Gemini 3.8 Flash (41) on the same index. For everyday reasoning you will not notice a gap; for the hardest abstract and knowledge tasks, GPT-6 Astra is the stronger model, while Grok 4.6 offers much of the capability for a fraction of the price.
Coding
ChatGPT has the stronger coding case. GPT-6 Astra scores 62 on Artificial Analysis’s independent Coding Agent Index, level with Claude Fable 5.1 and two above Claude Opus 5, though OpenAI has published no SWE-bench figure for it; its predecessor GPT-5.6 Sol, still selectable, posted 64.6% on SWE-bench Pro. Paired with OpenAI’s Codex agent, which reads and writes local files, runs shell commands and opens GitHub pull requests, GPT-6 Astra is a strong setup for real production coding.
Grok 4.6 is capable but unverified on coding. xAI has published no SWE-bench figure for Grok 4.6; its predecessor Grok 4.5 posted 64.7% on SWE-bench Pro (xAI-reported), level with GPT-5.6 Sol. xAI’s edge is cost and tooling reach: the cheap Grok Code Fast variant is popular for high-volume agentic coding via the API, and SpaceX’s June 2026 agreement to acquire Cursor pushes Grok deeper into developer tools. But if code quality is the priority, GPT-6 Astra and Claude Fable 5.1, joint leaders on the Coding Agent Index, are the stronger choices. Full detail in best AI for coding.
Writing and creative work
ChatGPT is the more rounded writing tool; Grok is the more unfiltered one. ChatGPT is widely rated among the most natural writers for creative and editorial work, and its Canvas workspace, memory and custom GPTs make it easy to keep a consistent voice across long projects. Its guardrails are firmer, which most users want but some find restrictive.
Grok’s writing pitch is its direct, lightly filtered personality: it answers with less hedging and moralising than rivals, which many users prefer for punchy, opinionated or irreverent copy, and its voice mode ships distinct personalities (Unhinged, Genius, Zen Master). That looseness is a double-edged sword — it is part of why Grok’s image tools ran into serious trouble (see Privacy and safety). For polished, reliable prose and long-form structure, ChatGPT is the safer tool; for a blunter voice with fewer refusals, Grok stands out.
Features and ecosystem
ChatGPT has by far the deeper ecosystem. It offers native image generation, Sora video, real-time voice (GPT-Live), Deep Research, an autonomous Agent Mode, Codex, persistent memory, Canvas, Projects, Connectors and more than three million Custom GPTs, across web, iOS, Android, macOS and Windows. With around a billion monthly users, it also has the widest third-party integration catalogue of any assistant. If you want one app that does everything and plugs into everything, ChatGPT is the obvious pick.
Grok’s feature set is narrower but has two things ChatGPT does not. First, real-time X (Twitter) data: Grok can read live posts, trends and sentiment, which no rival can access directly, and its DeepSearch research agent returns cited reports in under a minute where ChatGPT’s Deep Research can take 5–30 minutes. Second, voice companions — the persistent animated characters Ani and Valentine — which have no equivalent on ChatGPT. Grok also generates images (Aurora) and short video (Grok Imagine), but only on paid tiers. It has no custom-bot marketplace, no dedicated desktop app, and a far smaller integration ecosystem.
Real-time data and platform reach
This is Grok’s signature advantage and ChatGPT’s blind spot. Because xAI owns X, Grok has direct, live access to the platform’s posts and sentiment, plus a Polymarket integration for prediction-market data — genuinely useful for news, trend-tracking and “what are people saying right now” queries. ChatGPT can browse the web and cite sources, but it cannot read X’s live firehose the way Grok can. Grok is also embedded in places ChatGPT is not, including the X app and Tesla vehicles.
ChatGPT’s counter is sheer reach and integration depth. At roughly 900 million weekly and over a billion monthly users, against Grok’s ~117 million monthly, it has the larger community, more tutorials and templates, and connectors into Gmail, Calendar, Drive, GitHub, SharePoint and more. If your workflow runs through mainstream productivity tools, ChatGPT removes more friction; if your workflow runs through social and real-time information, Grok does.
Privacy and safety
This is the sharpest divide between the two. For consumer tiers, both providers may use your conversations to train their models by default, with an opt-out in settings, and both exclude training for business and API use — so the data-training defaults are broadly similar. The difference is everything around them.
ChatGPT is the more credentialed and safety-forward option: it holds SOC 2 Type 2 and the ISO 27001 family of certifications, offers Enterprise Key Management and data-residency options, and has a mature safety track record. Its main consumer downsides are ads on the lower tiers and a court order (in the New York Times copyright case) requiring it to retain certain logs.
Grok carries materially more risk. It holds no SOC 2 or ISO certifications, publishes thinner safety documentation than its peers, and is defined in 2026 by a deepfake and child-safety scandal: Grok’s image tools were used to generate non-consensual sexualised images of real people, including minors, prompting investigations by US state attorneys general, blocks in some countries, lawsuits and an Apple App Store warning (CNN). xAI restricted image generation to paying subscribers and removed it from the free tier in response. For anyone handling sensitive material, or any organisation with compliance requirements, ChatGPT is the safer choice by a wide margin; for individuals who prioritise a looser, less-moderated assistant, Grok’s positioning is deliberate.
Choose ChatGPT if…
- You want one polished app for everything — image, Sora video, voice, agents, custom GPTs and research.
- You need enterprise-grade compliance and safety — SOC 2, the ISO 27001 family, data residency and a stronger safety record.
- You value the broadest ecosystem and the strongest agentic coding via Codex and GPT-6 Astra.
Choose Grok if…
- You want real-time X (Twitter) data and fast, cited research through DeepSearch.
- You want a much cheaper flagship API ($2 / $6 per million tokens for Grok 4.6, against $10 / $50 for GPT-6 Astra).
- You want a direct, lightly filtered personality or the Ani and Valentine voice companions.
Frequently asked questions
Is ChatGPT or Grok better?
It depends on the job. ChatGPT is the better all-rounder — the broadest features, the deepest ecosystem, the most mature agents, and a much stronger safety and enterprise record, running GPT-6 Astra. Grok is better for real-time X data, cheap high-volume API reasoning and a direct personality, running Grok 4.6. For a polished do-everything assistant, choose ChatGPT; for live social data, the cheapest API or a looser assistant, choose Grok.
Is ChatGPT or Grok cheaper?
On the API, Grok is much cheaper: Grok 4.6 is $2 / $6 per million input/output tokens versus $10 / $50 for GPT-6 Astra — a fifth of the price on input and about an eighth on output. In the apps the gap closes: ChatGPT’s cheapest paid tier, Go at $8/month, runs GPT-5.6 Luna and undercuts Grok’s SuperGrok Lite at $10/month, and GPT-6 Astra starts on Plus at $20/month. ChatGPT’s free tier does run a stronger model (GPT-5.6 Luna, with unlimited text chats) than Grok’s free Grok 4-class access.
Which is better for coding?
ChatGPT. GPT-6 Astra scores 62 on Artificial Analysis’s independent Coding Agent Index, level with Claude Fable 5.1, and pairs with the Codex agent. xAI has published no SWE-bench figure for Grok 4.6; on the previous generation, Grok 4.5 (64.7%, xAI-reported) and GPT-5.6 Sol (64.6%) were level on SWE-bench Pro. See best AI for coding.
Can Grok see what’s happening on X?
Yes. Real-time access to X (Twitter) posts, trends and sentiment is Grok’s signature advantage, because xAI owns X. ChatGPT can browse the web and cite sources, but it cannot read X’s live data directly the way Grok can.
Does ChatGPT or Grok show ads?
ChatGPT shows labelled “Sponsored” ads on its Free and Go tiers, in a growing number of markets, including the US, UK, India and much of Europe; its paid Plus, Pro, Business and Enterprise tiers are ad-free. Grok’s standalone app shows no ads, though it is tied to X, which is an ad-supported platform.
Is Grok safe to use for work?
It depends on your requirements. Grok holds no SOC 2 or ISO certifications, publishes thin safety documentation, and was at the centre of a 2026 deepfake and child-safety scandal that drew regulatory action and lawsuits. For enterprise or compliance-sensitive use, ChatGPT — which holds SOC 2 Type 2 and the ISO 27001 family and offers data-residency options — is the safer choice.
What is Grok’s newest model?
Grok 4.6, released on 12 August 2026, is xAI’s current flagship; it succeeded Grok 4.5 and Grok 4.3. On OpenAI’s side, GPT-6 Astra became ChatGPT’s flagship on 5 September 2026, replacing GPT-5.6 Sol, which had held the role since 9 July 2026 and remains selectable.