GPT-5: What the New Model Means for Businesses

What is new about GPT-5?

On 7 August 2025, OpenAI unveiled GPT-5, its most powerful language model to date. Three shifts matter for businesses: a significantly larger usable context window (up to 400,000 tokens), more native tool-use integration, and a Mixture-of-Experts architecture that automatically routes tasks to the most suitable sub-model.

“GPT-5 is not just better, it is different. It understands context, plans ahead, and collaborates with external systems.”

The most important improvements

Intelligent teamwork: the expert model

GPT-5 is no longer a single model but an interconnection of specialized expert systems. OpenAI calls this “Mixture of Experts” (MoE):

Request type	Active system
Simple questions	Light, fast model
Complex analyses	Deep reasoning engine
Code generation	Specialized coding model
Mathematics	Logic specialist

Benefit for users: Faster responses for simple questions, deeper analyses for complex tasks, automatically, without manual selection.

Gigantic context window

GPT-5 can process up to 400,000 tokens, which is roughly 300,000 words or an entire book. For comparison: GPT-4 topped out at 128,000 tokens.

What does that mean in practice?

• Analyze a full annual report in one go
• Review all contracts of a project simultaneously
• Understand and refactor an entire codebase
• Summarize long email threads without losing information

Example: Upload a 200-page contract and ask: “Which clauses could be problematic in an acquisition?” GPT-5 analyzes the full text and delivers a structured answer.

Improved coding capabilities

GPT-5 shines as a coding assistant. The benchmarks show clear improvements:

Benchmark	GPT-4	GPT-5
HumanEval (Python)	67%	92%
MBPP (code tasks)	74%	89%
SWE-Bench (real-world bugs)	33%	71%

New capabilities:

• Writes and tests code autonomously
• Understands complex codebases with thousands of files
• Can interact with external tools (Git, CI/CD, databases)
• Explains code clearly for non-technical stakeholders

Native tool integration

GPT-5 connects directly to external systems:

• Gmail/Outlook: read, compose, and send emails
• Google Calendar: create and manage appointments
• Slack/Teams: send messages and react to mentions
• Salesforce: query and update CRM data
• Zapier/Make: thousands of additional integrations

That means: GPT-5 becomes a true assistant that not only advises but acts.

Multimodality at a new level

GPT-5 handles text, images, audio, and video seamlessly:

• Analyze images: understand diagrams, read handwriting, interpret screenshots
• Transcribe audio: summarize meetings, analyze podcasts
• Understand video: analyze presentations, summarize training videos
• Combined: “Here is the photo of our whiteboard sketch and the audio recording of the meeting, create minutes”

Variants and pricing

OpenAI offers GPT-5 in several editions:

Variant	Price (input/output)	Ideal for
GPT-5 Nano	$0.50 / $1.50 per 1M tokens	Simple tasks, high volume
GPT-5 Mini	$1.50 / $6.00 per 1M tokens	Everyday business tasks
GPT-5 Standard	$5.00 / $15.00 per 1M tokens	Complex analyses, coding
GPT-5 Pro	$15.00 / $60.00 per 1M tokens	Deep reasoning, longest contexts

For end users, ChatGPT Plus ($20/month) remains available with access to GPT-5 Standard, alongside the new ChatGPT Pro ($200/month) with unlimited access to all variants.

What does this mean for Swiss companies?

Concrete use cases

Legal department:

• Contract analysis in minutes instead of hours
• Automatic checks for compliance violations
• Drafting standard contracts with client-specific adjustments

Finance:

• Analyze and compare annual reports
• Detect anomalies in transaction data
• Generate and format reports automatically

Marketing:

• Content creation in all four national languages
• Analyze campaign performance
• Generate personalized email sequences

IT/development:

• Document and modernize legacy code
• Identify and fix bugs faster
• Keep technical documentation up to date

Swiss data protection

Important for Swiss companies: OpenAI’s Enterprise plan offers:

• Data processing in Europe
• No use for training
• SOC 2 Type II certification
• Custom data retention policies

For sensitive data we recommend the Azure OpenAI Service in the Swiss regions Switzerland North (Zurich) or Switzerland West (Geneva), providing full data residency inside Switzerland combined with Microsoft’s DPA. Compliance depth in our Swiss Data Protection Act (DSG) guide.

GPT-5 vs. the competition

Feature	GPT-5	Claude 3.5	Gemini 1.5
Max. context	400k tokens	200k tokens	1M tokens
Tool use	Native	API-based	Native (Google)
Multimodal	Yes	Yes	Yes
Strength	All-rounder	Analysis, writing	Google integration

How to get started

Recommendation for beginners

1. Try ChatGPT Plus ($20/month), access to GPT-5 for individual users
2. Define one use case, start with a concrete task
3. Learn prompt engineering, better prompts mean better results
4. Involve your team, training for everyone who can benefit

Recommendation for companies

1. Evaluate the Enterprise plan, data protection and admin features
2. Start a pilot project, one team, one process, measurable goals
3. Review API integration, automation into existing workflows
4. Establish governance, guidelines for responsible use

Conclusion

GPT-5 impressively shows how far language models have come in a short time. For companies the question is no longer whether to use AI, but how fast and how effectively.

In our training programs we teach you hands-on how to use GPT-5 and other models safely and efficiently, from fundamentals to enterprise integration.

---

Sources:

• OpenAI: GPT-5 Announcement (August 2025)
• The Verge: OpenAI releases GPT-5 (August 2025)
• Ars Technica: GPT-5 Technical Analysis (August 2025)
• OpenAI: Enterprise Pricing (2025)