ChatGPT 5.6 in Practice: Initial Compliments and Disappointments

Table of contents

    OpenAI rolled out GPT-5.6 in stages. It first appeared in limited test access for selected partners. Access to ChatGPT 5.6 reached Europe, including Poland, gradually, so only recently have teams been able to test the model in everyday work.

    Expectations are high. In the second half of 2026, businesses expect language models to handle multi-step tasks and work with extensive context. Ease of use matters too. GPT’s interface has undergone a major redesign. Has it improved the user experience and the quality of responses? This article explores that question, as well as:

    • which business processes ChatGPT 5.6 can support by improving productivity and the quality of working materials,
    • how to plan an AI pilot in your organisation, measure results and maintain quality control,
    • which limitations of ChatGPT 5.6 to consider before a wider rollout,
    • how to establish a shared standard for prompts and output validation across the team,
    • what early users think about working with ChatGPT 5.6.
    If you are looking for a full overview of the changes, pricing, models and capabilities of GPT-5.6, see our article GPT-5.6 from OpenAI: what has changed, pricing, capabilities and business applications.

    ChatGPT 5.6: our first impressions and early industry feedback

    Early expert reviews focus primarily on context handling. Reviewers note that when working with substantial material that goes through multiple rounds of edits, ChatGPT 5.6 is better at keeping the task on track. Most of us have experienced earlier OpenAI models losing their “bearing”. On top of that, the model itself encouraged endless revisions, which could pull the material away from the original intent of the prompt.

    GPT 5.5 had an irritating habit of suggesting more and more variations. Almost every response ended with a clickbait-style suggestion along the lines of: “If you want, I can help you add two elements that will create a wow effect and give the text around 50% more SEO power.” As a result, instead of closing the topic, we were drawn into the model’s endless doubts: could the material really not be improved further? GPT 5.6 is no less capable than the older model, but it finally respects what matters most: the intent behind the prompt and our time.

    Kajetan Terlecki
    SEO Specialist, TTMS

    Another recurring observation concerns the quality of the first draft—the material GPT produces after the first prompt. Reviewers emphasise that the model’s draft is usually well structured and much closer to a final version than it was with GPT 5.5. It is not a perfect ten yet, but a solid eight. In other words, a final version may be within reach after a relatively short time. With earlier GPT models, the “brainstorming” phase took much longer.

    The third—and most immediately noticeable—area is the way we use the tool, which we can simply call the “interface”. It is admittedly quite complex. Beyond writing a prompt, users must make a series of decisions:

    • which workspace should I choose: Chat or Work?
    • which model best fits my request: Luna, Terra or the most advanced Sol? Or is the older GPT 5.5 enough?
    • does the task require Deep Research?
    • how much effort should the model put into the task: low, medium, high, very high, max or ultra?
    • should I use Turbo mode and generate a response 50% faster at the cost of higher token use?

    If we add the almost endless range of available plugins, writing the prompt turns out to be only half the work required to get a useful result. I would welcome an automatic mechanism that reads the prompt and selects the right settings on its own. One that uses a sufficiently capable GPT model without wasting tokens when they are not needed.

    How do you navigate all this? We have outlined a suggested configuration here, including which modes to use for different types of tasks.

    GPT 5.6 pilot

    Where does GPT 5.6 outperform the previous version?

    1. GPT 5.6 is better at preserving document layout and formatting

    The previous version of GPT had something of a goldfish memory. You could also compare it to a short blanket: pull it over one part, and another is left exposed. When we asked the model to update data in a document it had generated, it produced a factually correct response, but one that no longer followed the original format. It might use a different heading hierarchy, rearrange the information or omit elements that are essential for the company.

    GPT 5.6 is much better at preserving the structure of reference material. OpenAI illustrated the difference in materials introducing GPT-5.6. The company placed three slides side by side: the reference file, the GPT-5.5 output and the GPT-5.6 output. The task was to update figures in a presentation while retaining the original template. In the comparison, GPT-5.5 omitted some template elements, while GPT-5.6 preserved the slide structure more faithfully: layout, typography, spacing, colours and recurring template elements.

    OpenAI states that GPT-5.6 can also interpret rules saved in the slide template, including the Slide Master. In practice, this matters when a presentation needs to retain not only its colours and fonts, but also defined layouts, spacing and mandatory components.

    2. GPT-5.6 moves beyond the chat window

    GPT-5.6 shows its greatest potential when it works not only with a single instruction, but also with files and tools made available by the user. It can then move quickly through a task: from gathering the materials to preparing a first draft. The new GPT model can identify related files in a project folder, flag places that need updating and prepare working versions of documents.

    There is a catch: the process still needs human oversight. Someone must check whether GPT found all the relevant files, understood the context correctly and left unchanged the elements that were meant to remain unchanged. Still, instead of manually digging through documents, the team starts with a list prepared by the model.

    3. From an idea to a version you can show the team

    Experts testing GPT 5.6 point out that the first version of a simple application, dashboard or website is now more often suitable for showing to a team and collecting specific feedback. It is somewhat like an MVP: good enough to test an idea, present it to the team and gather initial comments. A product owner can see the whole process, a designer can assess the layout and usability, and a developer can spot technical constraints sooner.

    This does not mean that GPT-5.6 creates a finished product. The initial prototype still needs to be assessed for security, quality and architecture. The difference is concrete, however: the team can evaluate an actual solution earlier, rather than debating assumptions alone.

    4. GPT 5.6: “I don’t know” — is this the end of answers given for the sake of answering?

    We all know the old classified ad: “Encyclopaedia Britannica, 40 volumes for sale. I got married a week ago, so I no longer need it. My wife knows everything better.” The know-it-all syndrome is a nuisance not only in old marriage jokes, but also for people who work with language models every day.

    GPT often lacks the information needed to give a reliable answer. GPT-5.5, like earlier versions, would rather provide an incorrect—yet convincing-sounding—answer than admit it did not know. What about the new version? The change is visible at first glance, even though it is hard to capture in a benchmark and easy to appreciate in day-to-day work.

    Our first days of working with the two most advanced models, Terra and Sol, suggest that GPT 5.6 is more likely to say “I don’t know”, “I don’t have enough data” or “I could not find anything else on this topic”. People still need to add or verify information manually, but this reduces the risk of an embarrassing error in material prepared for a client, the board or a project team.

    Before you give GPT-5.6 an important task: what to watch out for in early testing

    1. A working prototype is not yet a finished product

    GPT-5.6 can prepare a website, dashboard or simple application that can be launched and shown to the team. This is a major step forward, particularly when testing an idea. The tests also reveal the other side: elements can become misaligned, interactions do not always work as intended, and visual details still require refinement.

    The first version can be an excellent starting point, but it should not automatically be sent to clients or other external audiences. Before treating it as finished, we need testing, a security assessment and, in some cases, a developer’s review.

    2. The new Work environment can still be frustrating

    Model quality is one thing. The way we use it in practice is another. One reviewer pointed out that, in Work, it was difficult to access generated files and open a preview of the finished result. Others criticised the number of settings—discussed earlier in this article—as well as the unclear distinction between Chat, Work and Codex. GPT-5.6 may complete a task correctly, while the working environment still makes it difficult to retrieve or review the result. It is worth testing the entire process, not only the quality of the response in the chat window.

    3. GPT needs clear boundaries

    One reviewer tested how GPT-5.6 would handle a complex mathematical problem. The model produced correct parts of the solution, but surrounded them with definitions, digressions and comments that added little value. Only after the instruction was made more specific did it produce a useful result.

    The same applies in a business context. We should not leave the model too much room for interpretation. It is better to state the expected result directly: “Prepare a one-page summary. Include the decision, three arguments, risks, missing information and next steps.” GPT then has fewer opportunities to pad the topic with peripheral content.

    4. GPT can still be wrong

    The fact that GPT-5.6 appears more likely to signal that it lacks data or a basis for drawing a conclusion does not mean it is free from hallucinations. Luna, Terra and Sol—with Sol seemingly the least prone to this—can still provide an incorrect date, number, source or conclusion without batting an eyelid. The rule to “check after AI” still applies and will likely remain relevant for many future GPT releases.

    5. Start with one problem, not a large system

    Once GPT-5.6 has access to files, a browser and company tools, it is easy to imagine a system that instantly organises the inbox, analyses team communication, updates the CRM and writes responses to clients. This vision can quickly turn into a project larger than the problem it was meant to solve.

    One expert working with an extensive Codex environment recommends starting with a single, repeatable task. It might be preparing a meeting summary, gathering open project issues or updating an offer after data changes. Only once the team sees measurable results and understands the tool’s limitations is it worth adding further automations.

    GPT 5.6 test

    How should you run your first ChatGPT 5.6 test in the company?

    A pilot should answer one straightforward question: does GPT-5.6 genuinely improve a selected stage of work, and does the benefit justify the time, cost and additional quality control? The first test should not begin with building an extensive automation system. It is better to choose one repeatable task that currently takes up the team’s time and has a clearly defined outcome.

    This might be a meeting summary, a brief or a status report. What matters is that the team knows which materials it provides to the model, what result it expects and who reviews the final document.

    Before starting the pilot, answer five questions:

    1. Choose one process: for example, preparing meeting summaries, sales briefs or materials for project decisions.
    2. Set a baseline: measure the time needed to prepare the material, the number of revisions, the number of people involved and the most common errors.
    3. Prepare a shared prompt: use the same input materials and clearly describe the outcome the team expects.
    4. Assign expert review: nominate a person who will verify the facts, assess quality and approve the result before it is used further.
    5. Assess the outcome: compare time, the number of iterations, completeness of the material and the usefulness of the result for the next stage of the process.
    Pilot element Question for the team
    Process Which stage of work do we want to shorten or organise?
    Outcome What should be produced: a brief, decision list, analysis, recommendation or communication draft?
    Data Which materials are needed, and can they be used in the selected AI environment?
    Quality control Who confirms the facts, completeness and alignment of the material with the process?
    Metric How will we compare working time, the number of revisions and the usefulness of the result?

    After a few attempts, it becomes easier to assess whether the model is genuinely helping. Compare the time needed to prepare the material, the number of revisions and the effort required to verify the result. Only then decide whether to extend the pilot to further tasks.

    Three processes worth starting with

    1. Summaries after client meetings

    The model can organise notes, gather decisions, identify open questions and prepare a list of next steps. The team confirms the arrangements and assigns task owners. This helps them move from discussion to action more quickly.

    2. A brief for a sales conversation

    Based on selected sales materials, previous arrangements and public information about the company, GPT-5.6 can prepare a brief, discovery questions and a list of topics that require clarification. The salesperson remains responsible for the client relationship and decisions regarding the offer.

    3. A status report for the project team

    The model can organise information about progress, blockers, risks and planned actions. The project owner confirms that the information is up to date before the report is shared further. This reduces the time the team spends manually consolidating data from several sources.

    How do you embed AI in a business process?

    After the pilot, it becomes clear whether ChatGPT 5.6 genuinely shortens the preparation of materials, reduces the number of revisions and helps the team move more quickly to the next stage of work. It also reveals where the model needs a better brief, access to data or expert oversight. Proven use cases can then be extended to other processes.

    At this stage, it is worth addressing data security, integration with existing tools, output quality and a clear division of responsibilities. These factors determine whether AI becomes lasting support for the organisation.

    At TTMS, we help organisations identify processes where automation and AI create business value. We then design solutions tailored to their data, regulatory requirements and ways of working. We combine engineering experience with a responsible approach to AI governance, confirmed by ISO/IEC 42001 certification. Let’s discuss the processes AI could support in your organisation.

    FAQ

    How do you choose a process for your first ChatGPT 5.6 test?

    The best candidate is a repeatable process that requires gathering several pieces of information and producing a predictable result. Examples include meeting summaries, sales briefs, status reports and document analysis. The team should know the current turnaround time and typical issues, as these provide the baseline for assessing the test. Start with one process and expand the use of AI only after evaluating the outcome.

    How do you measure the business value of ChatGPT 5.6?

    During a pilot, measure the time needed to prepare the first version of the material, the number of revisions before approval, the completeness of the output and the expert time required for verification. It is also useful to track metrics related to the next stage of the process – for example, faster meeting preparation, a shorter time to close agreed actions or fewer missing details in a report. This data helps assess team productivity based on actual results and supports decisions about integrating AI into further processes.

    What data should you prepare for working with ChatGPT 5.6?

    The model produces better results when the team provides current, well-organised source materials. Before starting, identify which documents take priority, which data must remain unchanged and how unverified information should be marked. The organisation should also define which data can be shared in the chosen AI environment. For personal, financial and confidential data, access rules, retention and compliance are essential.

    How do you maintain human oversight of the model’s work?

    Human oversight should be part of the process from the start. The process owner defines the task scope, an expert verifies facts and alignment with requirements, and an authorised person approves external actions. This division of responsibilities is particularly important for client communication, publications, data changes in systems and materials with legal or financial implications. It allows the team to use automation while retaining responsibility for the outcome.

    Where can I find information about GPT-5.6 pricing, models and capabilities?

    We have covered the changes in GPT-5.6, pricing, the Sol, Terra and Luna models, and business applications in a separate article: GPT-5.6 from OpenAI: what has changed, pricing, capabilities and business applications. This article focuses on the practical use of ChatGPT 5.6 in team workflows, early user experiences and how to run an AI pilot in an organisation.

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