What is ChatGPT 5? What’s new, is it free, and how can I acquire it? Every query has been addressed.

Both free and premium ChatGPT users are now able to access OpenAI’s most recent language model, GPT-5. Performance and safety enhancements, wider system integrations, and additional variations are all included in the upgrade. So, how do you get to use ChatGPT 5? It’s easy; the new ChatGPT-5 welcome screen will appear instantly. It’s a staged roll out so it may take a while for everyone to be on GPT-5. However, you can always try to relogin to check.

In OpenAI’s long-term quest for artificial general intelligence, GPT-5 is being positioned as a significant advancement. The model is internally referred to as generally intelligent, despite not meeting AGI standards as outlined in OpenAI’s own charter. After deployment, it lacks the capacity to learn.

In comparison to previous iterations, the business asserts that GPT-5 is more accurate, efficient, and has lower hallucination rates. OpenAI’s CEO Sam Altman said the leap from GPT-4 to GPT-5 is comparable to the display upgrade from early iPhones to Retina displays.

Two new model variants have been launched: GPT-5-mini, a lightweight version, and GPT-5-nano, a faster and cheaper model available only via API. Free users will have access to GPT-5 and GPT-5-mini. Paid tiers unlock higher usage limits, with the $200/month Pro tier offering GPT-5-pro, GPT-5-thinking, and unlimited access.

Based on user plan and query complexity, the ChatGPT interface now automatically chooses the best model. Pro users can still access legacy models.

GPT-5 costs $1.25 per million input tokens and $10 per million output tokens for the API. The cost of GPT-5-mini is $0.25 for every million input tokens and $2 for every million output tokens. The cost of GPT-5-nano is $0.40 per million output tokens and $0.05 per million input tokens. The nano version is currently less expensive than the Gemini 2.5 Flash from Google.

Pro customers will be able to link ChatGPT with Gmail, Google Calendar, and Contacts starting next week. Later, access will be granted to further tiers. Without requiring manual selection, ChatGPT will automatically refer to these accounts when appropriate.

Cynic, Robot, Listener, and Nerd are the four pre-programmed characters from which users can now choose. Additionally, Advanced Voice Mode will be integrated with these modes. You can also change the chat color.

The API allows toggling between detailed and direct responses. Unlike the preceding o3 model, which had a context window of 200,000 tokens, GPT-5 has a context window of 256,000 tokens. Better retention over lengthy discussions, code, and papers is made possible by this.

In coding challenges, GPT-5 performs better than previous models. The benchmarks are 88 percent on Aider Polyglot, 55 percent on SWE-Lancer utilizing GPT-5-thinking, and 74.9 percent on SWE-Bench Verified. These include activities like bug fixes, multilingual support, and freelance work.

The OpenAI team gave GPT-5 instructions to create an interactive language-learning application during a demonstration. Within a minute, the system produced the desired features and user interface. According to OpenAI, the model can manage intricate task chains and tool usage, including calls made via browsers and APIs.

HealthBench Hard gave GPT-5-thinking a score of 25.5 percent, while o3 received a score of 31.6 percent. Medical experts have evaluated the results of OpenAI’s new model, which it claims performs better on a variety of health-related activities.

According to the corporation, the number of hallucinations has decreased. GPT-5-thinking displays a rate that is 26% lower than GPT-4o and 65% lower than o3. Safety updates include reduced chances of the model producing deceptive, hacked or unsafe outputs. Dual-use prompts are handled with what OpenAI calls “safe completions”, offering responses within controlled boundaries. Over 5,000 hours of red teaming and external testing were conducted to improve robustness.

When confronted with intractable prompts, the system is built to fail safely. This involves declining duties that are beyond its capability without producing deceptive results.

According to OpenAI, there are four million developers using the API, five million paid enterprise users, and 700 million weekly ChatGPT users.

What’s new in GPT-5: A summary of the main changes

• Available to All Users: GPT-5 is being rolled out to both free and paying ChatGPT users.
• New Model Variants: GPT-5-mini (lightweight)GPT-5-nano (API only, faster and cheaper)GPT-5-pro and GPT-5-thinking (for Pro-tier users)
• GPT-5-mini (lightweight)
• GPT-5-nano (API only, faster and cheaper)
• GPT-5-pro and GPT-5-thinking (for Pro-tier users)
• Automatic Model Selection: The chat interface now auto-selects the model based on the complexity of the query and user tier. Manual switching is no longer required.
• Pro-Tier Benefits: Unlimited GPT-5 accessAccess to GPT-5-pro and GPT-5-thinkingLegacy models still available
• Unlimited GPT-5 access
• Access to GPT-5-pro and GPT-5-thinking
• Legacy models still available
• Google Integration: Pro users can soon connect Gmail, Google Contacts, and Google Calendar to ChatGPT. Other tiers will get this later.
• Customisation Features: Users can choose chat coloursFour built-in personality modes: Cynic, Robot, Listener, NerdWill be integrated with Advanced Voice Mode later
• Users can choose chat colours
• Four built-in personality modes: Cynic, Robot, Listener, Nerd
• Will be integrated with Advanced Voice Mode later
• Performance Boosts: Context window increased to 256,000 tokens (up from 200,000 in previous o3 model)Lower hallucination rate than GPT-4o and o3Improved performance in coding benchmarks like SWE-Bench, SWE-Lancer, and Aider PolyglotBetter at agentic tasks and tool execution (e.g., API and browser usage)
• Context window increased to 256,000 tokens (up from 200,000 in previous o3 model)
• Lower hallucination rate than GPT-4o and o3
• Improved performance in coding benchmarks like SWE-Bench, SWE-Lancer, and Aider Polyglot
• Better at agentic tasks and tool execution (e.g., API and browser usage)
• Developer Pricing: GPT-5: $1.25/1M input tokens, $10/1M output tokensGPT-5-mini: $0.25/1M input, $2/1M outputGPT-5-nano: $0.05/1M input, $0.40/1M output
• GPT-5: $1.25/1M input tokens, $10/1M output tokens
• GPT-5-mini: $0.25/1M input, $2/1M output
• GPT-5-nano: $0.05/1M input, $0.40/1M output
• Health-related Performance:
• GPT-5-thinking outperforms o3 in health benchmarks
• Claimed to be OpenAI’s best model for medical questions