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Last updated: October 2026
Grok vs ChatGPT: which is better in October 2026?
It depends on the job. SpaceXSI's Grok 4.7 lists at $2 per million input tokens against $10 for OpenAI's GPT-6 Astra, yet Artificial Analysis scores Astra higher (53 against 46) and puts the cost of an average task close together, at $3.74 for Grok and $3.26 for Astra (Artificial Analysis, 2026).
This guide compares Grok (SpaceXSI, the company formerly known as xAI, acquired by SpaceX in February 2026) with ChatGPT (OpenAI) on models, consumer plans, API pricing, benchmarks, real-time X data, security and enterprise controls. Every figure is dated and linked to the page where it appears.
TL;DR: Key Takeaways
- Grok is cheaper per token, not per task. Grok 4.7 costs $2 input and $6 output per million tokens, and used 81,000 output tokens per task against 27,000 for GPT-6 Astra (Artificial Analysis, 2026).
- Astra leads the independent index. Artificial Analysis scores GPT-6 Astra 53 and Grok 4.7 46, with the widest gap on Terminal-Bench 4.0 (59% against 26%) (Artificial Analysis, 2026).
- Grok wins on knowledge-work agents and latency. It scores 1,716 against 1,542 on GDPval-AA and answers in about 50 seconds end to end against 294 for Astra (Artificial Analysis, 2026).
- The consumer entry price differs. SuperGrok costs $30 a month, ChatGPT Plus $20 (SpaceXSI, 2026; OpenAI, 2026).
- Grok reads X natively. Its X Search tool fetches posts at $5 per 1,000, which is also an injection surface (SpaceXSI docs, 2026).
- Neither vendor solves prompt injection. OpenAI says it is "unlikely to ever be fully 'solved'", and Adversa AI reported a 40% success rate against Grok's web chat (TechCrunch, 2025; The Hacker News, 2026).
Grok vs ChatGPT at a glance: models, plans and price
| Grok (SpaceXSI) | ChatGPT (OpenAI) | |
|---|---|---|
| Flagship model | Grok 4.7, Sept 21, 2026 | GPT-6 Astra, Sept 3, 2026 |
| API price per 1M tokens (in / out) | $2 / $6 | $10 / $50 (Astra); $2 / $10 (6.1 Sol) |
| Context window | 500K tokens | 1,000K listed for Astra (Artificial Analysis) |
| Independent index (Artificial Analysis) | 46 | 53 |
| Real-time X data | Native X Search tool | Not a native feature |
Sources: SpaceXSI news, SpaceXSI pricing, OpenAI API changelog, OpenAI Pro tiers, Artificial Analysis. Retrieved October 5, 2026.
Models: what SpaceXSI and OpenAI ship today
SpaceXSI released Grok 4.5 on July 16, Grok 4.6 on August 12 and Grok 4.7 on September 21, 2026. OpenAI released GPT-6 Astra on September 3, GPT-6 Sol and Luna on September 22 and GPT-6.1 Sol on September 29 (SpaceXSI, 2026; OpenAI, 2026).
Grok 4.7
Grok 4.7 has a May 2026 knowledge cutoff and a 500,000-token context window (SpaceXSI docs, 2026). It reaches developers through the SpaceXSI API, Cursor, Grok Build and routers such as OpenRouter. SpaceXSI's individual plans still list Grok 4.6.
GPT-6 Astra, Sol and Luna
Astra is OpenAI's most capable model, available to ChatGPT Plus, Pro, Business and Enterprise users and through the API, Azure and AWS Bedrock (OpenAI, 2026). Sol and Luna carry Astra's capabilities at lower cost: $2 and $0.10 input per million tokens (OpenAI, 2026). For how ChatGPT compares with Anthropic's and Google's models, see our Claude vs ChatGPT and Gemini vs ChatGPT guides.
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Consumer plans: SuperGrok against ChatGPT tiers
SuperGrok costs $30 a month and ChatGPT Plus $20, but the ladders differ more than the entry prices. Grok's free tier already includes real-time web and X search, while ChatGPT adds Go at $8 and three Pro levels up to $500.
| Tier | Grok (SpaceXSI) | ChatGPT (OpenAI) |
|---|---|---|
| Free | $0, Grok 4.6, web and X search | $0, GPT-5.6 Luna, unlimited text chats |
| Entry paid | SuperGrok Lite (price not shown) | Go, $8 a month |
| Standard | SuperGrok, $30 | Plus, $20 |
| High usage | SuperGrok Plus, $100 | Pro 100 ($100) and Pro 200 ($200) |
| Top tier | SuperGrok Heavy (price not shown) | Pro 500 ($500, includes Astra Ultrafast) |
Sources: SpaceXSI pricing, OpenAI Go (January 2026), OpenAI Pro tiers, OpenAI Business, ChatGPT pricing. Retrieved October 5, 2026.
API pricing and context windows
Grok 4.7 has the lowest list price among the flagships at $2 input and $6 output per million tokens, with a fast variant at $4 and $12 for twice the output speed. GPT-6.1 Sol matches its input price at $2 but charges $10 for output. Astra costs five times more on input.
| Model | Input per 1M | Output per 1M | Context | 1M in + 200K out |
|---|---|---|---|---|
| Grok 4.7 | $2 | $6 | 500K | $3.20 |
| GPT-6.1 Sol | $2 | $10 | 272K input | $4.00 |
| GPT-6 Astra | $10 | $50 | up to 1M | $20.00 |
| GPT-6 Luna | $0.10 | $0.50 | 272K input | $0.20 |
Sources: SpaceXSI docs, SpaceXSI, OpenAI changelog, OpenAI, Artificial Analysis (Astra context). The last column is our arithmetic. Retrieved October 5, 2026.
Sticker price misleads here. Artificial Analysis measured 81,000 output tokens per task for Grok 4.7 and 27,000 for Astra, so the five-fold price gap shrinks to $3.74 against $3.26 per task. Budget on measured cost per task, not on token rates.
Grok vs ChatGPT benchmarks: vendor-reported and independent
Vendor figures put Grok 4.7 close to Astra on coding: 71.0% against 74.1% on DeepSWE v1.1. Independent testing shows a wider gap on the hardest agentic work and a Grok lead on professional knowledge tasks.
How we compared
We did not run these models. We used vendor announcements, Artificial Analysis and DataCamp, and we label vendor-reported numbers as such. Artificial Analysis tested Grok 4.7 at its xhigh setting and Astra at max. All figures were checked on October 5, 2026.
| Benchmark (vendor-reported) | Grok 4.7 | GPT-6 Astra |
|---|---|---|
| DeepSWE v1.1 | 71.0% | 74.1% |
| Terminal-Bench 4.0 | 38.0% | 57.9% |
| Price per 1M tokens (in / out) | $2 / $6 | $10 / $50 |
Source: DataCamp (2026), compiling both vendors' announcements.
| Independent measure (Artificial Analysis) | Grok 4.7 | GPT-6 Astra |
|---|---|---|
| Intelligence Index | 46 | 53 |
| GDPval-AA | 1,716 | 1,542 |
| AA-Briefcase | 1,645 | 1,569 |
| Terminal-Bench 4.0 | 26% | 59% |
| Humanity's Last Exam | 43% | 55% |
| Time to first token | 43 seconds | 285 seconds |
Source: Artificial Analysis (2026). Retrieved October 5, 2026.
One discrepancy matters. SpaceXSI reports 38.0% on Terminal-Bench 4.0 while Artificial Analysis measured 26%, a gap DataCamp (2026) flags explicitly. Artificial Analysis also reports a 29% hallucination rate for Grok 4.7, down from 34% for Grok 4.6 (Artificial Analysis, 2026).
Real-time X data: where Grok differs
Grok's distinguishing feature is native access to X. The X Search tool runs keyword search, semantic search, user search and thread fetch, filters by up to 20 handles and by date, and can analyze images and video in posts. Without search tools enabled, Grok has no knowledge of real-time events (SpaceXSI docs, 2026).
Developers pay $5 per 1,000 posts fetched and $10 per 1,000 user profiles fetched, on top of token costs. Grok's free plan includes real-time web and X search (SpaceXSI, 2026).
This suits social listening and breaking-news workflows. It also has a security consequence: posts are attacker-controlled text, so an agent that reads them is exposed to indirect prompt injection. Private accounts are not surfaced in Grok responses, according to X Help (2026).
Grok vs ChatGPT security and governance for enterprises
Both products share one core exposure: models that read untrusted content and act on it. According to OWASP (2025), prompt injection is LLM01 in its Top 10 for LLM applications, and indirect injection through websites and files is the form that reaches agents.
What the record shows
| Date | Finding | Product |
|---|---|---|
| July 2025 | NeuralTrust jailbroke Grok-4 two days after launch with Echo Chamber and Crescendo, succeeding 67% of the time on one test | Grok-4 |
| July 2025 | Grok posted antisemitic content for about 16 hours after an upstream code update | Grok on X |
| Jan 2026 | Ofcom and the European Commission opened probes into sexualized Grok images | Grok on X |
| Aug 2026 | Adversa AI reported encrypted prompt injection with a 40% success rate across 20 attempts; no patch or CVE | Grok 4.5 Fast web chat |
Sources: NeuralTrust (2025), Maginative (2025), RPC (2026), The Hacker News (2026).
Most of these findings involve earlier Grok versions, and RPC reported both probes as ongoing; we found no regulator decision. SpaceXSI says Grok 4.7 has an entirely new safeguard stack, and its announcement reports that only 3.3% of risky dual-use prompts get through on HackerBench v0.3 (SpaceXSI, 2026). That is vendor-reported, and we found no independent agentic injection test of Grok 4.7.
ChatGPT carries its own risk. OpenAI said in December 2025 that prompt injection against its Atlas browser agent is "unlikely to ever be fully 'solved'" (TechCrunch, 2025). Our GPT-6 Astra briefing covers the model's cyber capability. Gartner's first Market Guide for Guardian Agents, published February 25, 2026, notes that guardian agent deployments are mainly prototypes or pilots (The Hacker News, 2026), so most teams still rely on model-level defenses.
How NeuralTrust addresses this
Controls have to sit where the agent acts, whichever model sits behind it. Agent Gateway (TrustGate) enforces one policy across Grok, GPT and other providers, so moving a workload does not reset the rules. Agent Runtime Security (TrustGuard) inspects prompts, tool calls and outputs, including text pulled from X or the web. AI Red Teaming (TrustTest) lets you run your own injection tests against Grok 4.7 before approval. Agent Posture Management (TrustLens) maps which agents hold which permissions. These form the Runtime Security Mesh. See the AI gateway and AI agent security pages.
Enterprise offerings and data policies
Both vendors state that business data is not used for training by default, and both cite SOC 2 Type 2. They differ on consumer training, residency and agent hosting. Grok's consumer app trains on public X data and user interactions unless you opt out; business and API traffic is excluded.
| Control | SpaceXSI Grok | OpenAI ChatGPT |
|---|---|---|
| Business and API training | "No training, ever" (Business); API data never trained on without permission | Not trained on by default |
| API retention | 30 days, zero data retention available | Up to 30 days unless zero data retention is requested |
| Attestations | SOC 2 Type 2; HIPAA via BAA | SOC 2 Type 2 (Enterprise, Business, Edu, API) |
| Residency | US-only endpoint at 10% higher price | Ten regions on Enterprise |
| Identity and keys | SSO, SCIM, Enterprise Vault with customer-managed keys | SAML SSO, SCIM, EKM, Compliance API |
Sources: SpaceXSI API security FAQ (2026), SpaceXSI Business launch (December 30, 2025), X Help (2026), OpenAI enterprise privacy (2026), OpenAI Business (2026).
For agents, SpaceXSI's Grok Bot runs only on Cursor-hosted cloud computers, with no on-premises option. Its documentation adds that approvals and network controls "reduce, but do not eliminate, risk" (SpaceXSI docs, 2026). Grok Bot for Enterprise opened on September 3, 2026 with a two-week trial for existing customers (SpaceXSI, 2026).
Which should you choose?
Choose Grok when live X data, low token prices or fast answers matter most, and ChatGPT when you need the strongest measured reasoning, regional residency or the cheapest entry plan.
| If you are... | Choose | Why |
|---|---|---|
| Monitoring X, brands or breaking news | Grok | Native X Search with date and handle filters |
| Running the hardest terminal and long-horizon agents | ChatGPT (GPT-6 Astra) | Terminal-Bench 4.0 at 59% against 26% independently |
| Building professional knowledge-work agents | Grok | GDPval-AA 1,716 against 1,542 |
| Optimizing real cost per task | Test both | $3.74 for Grok against $3.26 for Astra |
| Needing regional data residency | ChatGPT Enterprise | Ten regions against one US endpoint |
| Buying the cheapest personal plan | ChatGPT | Go at $8 and Plus at $20 against SuperGrok at $30 |
| Running agents on regulated data | Neither alone | Add gateway and runtime controls to either |
Conclusion
Grok vs ChatGPT has no single winner in October 2026. Grok 4.7 offers the lowest list price, the fastest answers and unique X data access. GPT-6 Astra leads the independent index, handles harder agentic tasks and arrives with broader residency options. Cost per task is nearly equal, and neither vendor has solved prompt injection, so test each model on your workload and keep policy controls outside the model.
Secure Grok and ChatGPT Agents in Production with NeuralTrust
Run Grok, GPT and other models behind one policy layer, and test each against your own threats before it goes live.
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Related Comparisons
- Claude vs. ChatGPT: Benchmark & Models Comparison 2026
- Gemini vs. ChatGPT: Benchmark & Models Comparison 2026
- GPT-6 Astra: Security Implications for CISOs
FAQs about Grok vs ChatGPT
1. Is Grok better than ChatGPT?
Not on the independent index. Artificial Analysis scores GPT-6 Astra 53 and Grok 4.7 46, and Astra leads Terminal-Bench 4.0 by 59% to 26%. Grok leads GDPval-AA (1,716 against 1,542) and answers faster. The better tool depends on whether you value reasoning depth or speed and live X data (Artificial Analysis, 2026).
2. Is Grok cheaper than ChatGPT?
On API list price, yes: Grok 4.7 costs $2 input and $6 output per million tokens against $10 and $50 for GPT-6 Astra. Per task the gap closes, at $3.74 for Grok and $3.26 for Astra, because Grok uses more tokens. For individuals, ChatGPT Plus at $20 undercuts SuperGrok at $30 (Artificial Analysis, 2026).
3. Does Grok have real-time access to X?
Yes. The X Search tool lets Grok search posts by keyword or meaning, fetch threads, and filter by up to 20 handles and by date. API use costs $5 per 1,000 posts fetched plus tokens. Grok's free plan also includes real-time web and X search (SpaceXSI docs, 2026).
4. Is Grok safe for enterprise use?
It can be, with controls. SpaceXSI holds SOC 2 Type 2 and offers a 30-day retention default with zero data retention. But Adversa AI reported a 40% encrypted prompt injection success rate against Grok 4.5 Fast, and no independent injection test of Grok 4.7 exists yet. Test it and add runtime controls (The Hacker News, 2026).
5. Does Grok train on your data?
Consumer Grok on X uses public X data and your interactions for training unless you opt out in X settings. SpaceXSI says it never trains on API inputs or outputs without explicit permission, and Grok Business promises no training on customer data (SpaceXSI docs, 2026).
6. What is the Grok context window compared with ChatGPT?
Grok 4.7 supports 500,000 tokens. Artificial Analysis lists 1,000,000 tokens for GPT-6 Astra, while OpenAI's changelog lists 272,000 input tokens for GPT-6 Sol, Luna and 6.1 Sol. Check the model page for your tier before designing around a limit (SpaceXSI docs, 2026).
About the Author
Roger Howroyd is Head of Global SEO and AI at NeuralTrust, where he leads the company's search strategy across SEO, AEO, GEO, and LLM optimization. He specializes in AI-powered search, content strategy, and SEM. Connect on LinkedIn.
NeuralTrust is the leading platform for securing and scaling AI agents. Named a Pioneer in the Gartner Emerging Market Quadrant for AI Application Security 2026, recognized across four Gartner Hype Cycle reports in 2026, and featured in the Gartner Market Guide for Guardian Agents 2026, the Gartner Market Guide for AI Gateways 2025 and the KuppingerCole Leadership Compass for Generative AI Defense 2025. Headquartered in Barcelona with offices in London and New York. ISO 27001 certified.
Sources
- Artificial Analysis, Grok 4.7 (xhigh) vs GPT-6 Astra (max): Model Comparison, retrieved October 5, 2026.
- Artificial Analysis, Benchmarking Grok 4.7, September 21, 2026.
- SpaceXSI, Introducing Grok 4.7, September 21, 2026.
- SpaceXSI, News, retrieved October 5, 2026.
- SpaceXSI, Pricing: Compare Grok Plans, retrieved October 5, 2026.
- SpaceXSI docs, Grok Models & Pricing, retrieved October 5, 2026.
- SpaceXSI docs, X Search, retrieved October 5, 2026.
- SpaceXSI docs, API Security FAQ, retrieved October 5, 2026.
- SpaceXSI docs, Grok Bot security, retrieved October 5, 2026.
- SpaceXSI, Introducing Grok Business and Grok Enterprise, December 30, 2025.
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