What is ChatGPT 4?
ChatGPT 4 is the version of ChatGPT powered by OpenAI's GPT-4 large language model, announced on March 14, 2023. It was OpenAI's first multimodal model — capable of accepting both text and image inputs — and a significant leap over GPT-3.5 on reasoning, coding, and professional benchmarks. The chat gpt 4 family now includes several variants: original GPT-4, GPT-4 Turbo, GPT-4o (omni), GPT-4o mini, and GPT-4.1 with a million-token context window.
GPT-4 is a transformer-based model trained on a mix of public web data and data licensed from third-party providers, then fine-tuned with reinforcement learning from human feedback (RLHF). According to OpenAI's GPT-4 Technical Report (arXiv:2303.08774), the model performs at human level on many academic and professional benchmarks — passing the Uniform Bar Exam in the 90th percentile, scoring 1410/1600 on the SAT, and 5/5 on multiple AP exams.
In day-to-day use, "ChatGPT 4" today usually means GPT-4o — the natively multimodal successor that became the default for paying ChatGPT users in May 2024. OpenAI has since released GPT-5 as its new flagship, but the GPT-4 family remains widely deployed in Microsoft Copilot, Bing Chat, and thousands of API products.
Every GPT-4 variant, side by side
The GPT-4 family has six widely used variants. Here's when each was released and what it's best at.
The original frontier model — strong reasoning and coding baseline.
Long documents, structured output, and JSON mode at lower cost.
Native multimodal — text, vision, and audio in a single model.
Highest throughput, cheapest GPT-4-class model for everyday tasks.
Million-token context window, better instruction following, coding.
OpenAI's successor generation — newer than GPT-4, available on ZeroTwo.
All six GPT-4 variants — plus GPT-5, Claude, Gemini, Grok, and DeepSeek — are available in a single ZeroTwo Pro subscription.
Try ZeroTwo for $29.99/moWhat can ChatGPT 4 do?
Four capabilities that separated GPT-4 from earlier models — and still define what GPT-4-class systems are good at today.
Advanced reasoning
GPT-4 scored in the top 10% of test takers on a simulated bar exam, versus GPT-3.5 which scored in the bottom 10%, according to OpenAI's GPT-4 Technical Report.
Vision and multimodality
GPT-4 (and especially GPT-4o) can analyze images, charts, screenshots, and handwritten notes — answering questions grounded in what it sees.
Long-context comprehension
GPT-4 Turbo and GPT-4.1 handle 128K–1M tokens, enough for entire codebases, contracts, or research papers in a single prompt.
Coding and tool use
GPT-4 powers Microsoft Copilot and ranks among the top general-purpose coding models. Function calling and structured output make it production-ready.
Want a head-to-head against newer models? See how GPT-4 compares to Claude, Gemini, and Grok →
ChatGPT 4 vs ChatGPT 4o vs GPT-4 Turbo
Three models, very different price–performance trade-offs. API pricing reflects OpenAI's public rates as of early 2025.
| Feature | GPT-4 | GPT-4 Turbo | GPT-4o |
|---|---|---|---|
| Context window | 8K – 32K | 128K | 128K (multimodal) |
| Vision input | Limited | Yes | Yes (native, faster) |
| Audio input/output | No | No | Yes (native) |
| Speed (tokens/sec) | Slow | Medium | ~2× faster than GPT-4 Turbo |
| API cost (per 1M input) | $30 | $10 | $2.50 |
| Best for | Legacy compatibility | Long context, JSON | Vision + speed + cost |
Sources: OpenAI API pricing, OpenAI: Hello GPT-4o.
Stop juggling ChatGPT Plus, Claude Pro, and Gemini Advanced
ChatGPT Plus is $20/mo for one provider. ZeroTwo gives you GPT-4-class, Claude Sonnet 4.5, Gemini 2.5 Pro, Grok 4, DeepSeek R1, and 60+ more for $29.99/mo.
Which GPT-4 model for which task?
A practical decision matrix from people who run GPT-4-class workloads daily.
| Task | Recommended model |
|---|---|
| Long-form writing | GPT-4 / GPT-4.1 |
| Image analysis | GPT-4o |
| Code refactors | GPT-4.1 |
| High-volume drafting | GPT-4o mini |
| Math & logic | o3 / o4-mini |
| Long research docs | GPT-4 Turbo |
What ChatGPT 4 still gets wrong
GPT-4 is powerful but far from infallible. A 2024 Stanford AI Index Report found that hallucination rates on factual questions still exceed 15% for the strongest GPT-4 variants on certain benchmarks. Treat it as a fast first-draft collaborator, not a source of truth.
- Knowledge cutoff: GPT-4 variants have training cutoffs ranging from late 2023 to mid-2024 — pair with web search for current events.
- Hallucinations: GPT-4 can still confidently fabricate citations, statistics, and code APIs. Always verify load-bearing facts.
- Cost at scale: GPT-4 is 10–20x more expensive per token than GPT-4o mini or GPT-3.5. Choose the right variant for the task.
- Rate limits on ChatGPT Plus: Plus users get capped GPT-4 message quotas; ZeroTwo Pro removes per-model quotas.
“GPT-4 is more reliable, creative, and able to handle much more nuanced instructions than GPT-3.5. We've spent six months making GPT-4 safer and more aligned. GPT-4 is 82% less likely to respond to requests for disallowed content and 40% more likely to produce factual responses than GPT-3.5 on our internal evaluations.”
ChatGPT 4 — frequently asked questions
Use GPT-4 — and every other AI worth using
GPT-4-class models, Claude Sonnet 4.5, Gemini 2.5 Pro, Grok 4, DeepSeek R1 and 60+ others — one subscription, $29.99/month.