Claude Opus 4.8 or GPT-5.6 Sol: which is better?

Comparing these models by name alone is pointless: both aim to be general-purpose assistants, but they feel different in practice. We added Claude Opus 4.8 and GPT-5.6 Sol on their release day, then tested them on code, explanations, editing, and tasks involving large amounts of source material.

QueryWise is available in Kazakhstan: payments are processed in tenge, the interface is available in Russian and Kazakh, and new users get 3 free questions. That means you can test both models without a separate subscription or currency conversion.

Which model leads on quality?

According to the current QueryWise score, GPT-5.6 Sol is ahead: GPT-5.6 Sol scores 9.8 and ranks Claude Fable 5 overall. Claude Opus 4.8 currently has 9.4 and ranks 4, while GPT-5.6 Sol has 9.8 and ranks 2.

The gap between them is better understood as a practical difference than a chasm. Claude Opus 4.8 scored 9.6 for coding and 9.5 for reasoning. GPT-5.6 Sol scores 9.9 and 9.5, respectively. If a task involves writing a working code snippet, finding a bug in a project, or carefully turning requirements into code, the advantage currently goes to the model with the higher coding score: GPT-5.6 Sol.

When it comes to reasoning, the models may be very close. For comparing legal wording, planning a study project, or reviewing a debatable technical decision, I would look beyond the overall score and check how well the model follows the constraints in the prompt. GPT-5.6 Sol more often delivers a focused answer immediately. Claude Opus 4.8 is frequently more useful when it needs to maintain a long chain of reasoning.

Speed and price in tenge

The current telemetry lists Claude Opus 4.8 at a median speed of —. GPT-5.6 Sol is at 17. In practice, this means that for a short question requiring an immediate answer, the faster model saves several moments of waiting throughout the day. With a large text, the difference is less noticeable—the quality of the first draft matters more there.

An average question to Claude Opus 4.8 costs approximately 22 ₸, while a question to GPT-5.6 Sol costs approximately 25 ₸. That is a small difference per task, but it adds up with daily use. Claude looks like the better value if you ask many ordinary questions, request rewrites, or use the model as an editor. GPT-5.6 Sol justifies the extra cost when speed and stronger programming results matter.

The price is calculated for an average question in QueryWise, not every possible request. A large document, long conversation, or complex piece of code may use more resources.

Context and task types

Claude Opus 4.8 has a context of 1M, compared with 1.1M for GPT-5.6 Sol. This is the amount of text a model can retain within a single request. It is useful for reviewing a large technical specification, several project files, or a long thread of correspondence with revisions.

I would choose Claude Opus 4.8 for editorial work—for example, reviewing a research report, preserving its terminology, and rewriting it in clear language for an executive. Comparing several versions of a contract or internal guideline is another strong use case. The model is convenient when the goal is not merely to produce an answer but to preserve the structure of the material.

GPT-5.6 Sol looks stronger at tasks such as “find the bug in this Python code and suggest tests,” “design an API for a delivery service,” or “turn a feature description into a ready-to-use component.” Accuracy of implementation and iteration speed matter here. It is also a meaningful advantage for learning programming: you can quickly get working examples and then ask for every line to be explained.

In QueryWise, you can run both models side by side on the same question. You can see where they agree and where they differ, making it easier to spot questionable details. For facts, calculations, and important decisions, this is more useful than blindly accepting the first answer.

An honest verdict

If you want the best result by the current overall score, choose GPT-5.6 Sol: GPT-5.6 Sol is currently ahead with a score of 9.8. For coding, also compare 9.6 against 9.9—the model with the higher value has the advantage. In analytics and complex explanations, 9.5 and 9.5 may be nearly equal, so response style and the specific task become decisive.

For development, my choice would be GPT-5.6 Sol if its current coding score remains higher. For long editorial work and analysis of extensive material, I would choose Claude Opus 4.8, especially when a careful tone and consistency matter. If price matters more than the maximum result, compare 22 ₸ and 25 ₸: the difference is small, but it becomes noticeable across hundreds of requests.

Both models are assistants, not replacements for a doctor, lawyer, or financial adviser. For those topics, verify the answer against official sources and consult a qualified professional.