Claude Opus 4.8 or Claude Opus 5.5 — which is better?

Quality: 4.8 vs 5.5

By the current QueryWise score, Claude Opus 5.5 is ahead with Claude Opus 5.5 points. Claude Opus 4.8 ranks 16 with a result of 7.8, while Claude Opus 5.5 ranks 1 with 9.9. The current QueryWise leader is Claude Opus 5.5, with a score of 9.9.

This is more than a cosmetic difference. Claude Opus 4.8 remains a strong model, especially when you need a careful breakdown of a complex task. But Claude Opus 5.5 delivers a higher overall result, so when there are no additional requirements, the quality choice is clear: Claude Opus 5.5 is ahead.

Claude Opus 4.8 has separate scores in two useful areas: coding is 9.2, while reasoning is 9.5. For Claude Opus 5.5, the current sub-scores are — for coding and — for reasoning. So the fairest comparison within these two categories is this: Claude Opus 4.8 can be judged by its specific results, while the final choice for 5.5 is based on its overall QueryWise score.

We tested both models with real questions. For a prompt such as “find the bug in a Python function that loses the time zone when converting a date, and suggest tests,” Claude Opus 4.8 reliably analyzes the logic and usually proposes a fix with validation checks. Claude Opus 5.5 is stronger when it must explain the cause, rewrite the code, and account for several edge cases at once. That is a difference in actual work, not just a nice number in a table.

Price and speed in QueryWise

The average cost of a question is approximately 22 ₸ for Claude Opus 4.8 and approximately 18 ₸ for Claude Opus 5.5. Based on current data, Claude Opus 5.5 is cheaper even though its overall score is higher. It is an unexpected but welcome result: the newer model does not charge extra for every ordinary request.

The median response speed for both models has not yet accumulated enough telemetry. So claiming that one is faster would be speculation. For a short question about an Excel formula, the price difference will be small. But when analyzing a large document or a long code sample, the cost of individual requests becomes noticeable, especially if you ask many follow-up questions.

Both models are available from Kazakhstan in QueryWise: payments are made in tenge, the interface is available in Russian and Kazakh, and new users receive three free questions to start. That is enough to test the answers on your own material instead of choosing based only on the version name.

Same context, different scenarios

The two models have context windows of 1M and 1M, respectively. That capacity is useful when you need to upload a long contract, a set of technical requirements, or several related files. But a large context window alone does not guarantee an accurate answer: the model may still misjudge priorities or miss an exception.

Claude Opus 4.8 is a sensible choice when you want controlled coding with a clearly defined scope. For example, you can ask it to check an SQL query, explain why it runs slowly, and rewrite it for a specific table structure. Its coding score of 9.2 makes this one of its strengths.

Claude Opus 5.5 is preferable when a question has several layers. Suppose you need to analyze a 200-page supply contract, identify risks for a Kazakhstan-based company, and prepare a list of questions for a lawyer. It is also more convenient for learning when you need more than an answer and want a clear explanation that moves from definition to example.

In QueryWise, you can ask both models the same question and see where they agree. That is more useful than marketing copy: matching conclusions increase confidence, while disagreements point to areas worth double-checking.

Choose based on the task

For the highest answer quality, the current winner is Claude Opus 5.5. That is a direct conclusion from the current Claude Opus 5.5 score, not an attempt to present both models as equally good.

For coding, Claude Opus 4.8 looks convincing thanks to its sub-score of 9.2. If the task is local and you want an inexpensive check of a function, query, or architectural decision, it is a sensible choice. Claude Opus 5.5 is the better option when the code is tied to a long specification, multiple files, and ambiguous requirements.

Claude Opus 4.8 has a reasoning score of 9.5. It works well for structured analysis and explanations. At the same time, the overall ranking puts Claude Opus 5.5 ahead, so for complex research, an educational walkthrough, or a long document, I would choose Claude Opus 5.5.

The conclusion is simple: Claude Opus 4.8 is a strong option for focused coding and tasks with clear boundaries. Claude Opus 5.5 is the better-value choice when you want the strongest overall result and the cost per question matters. For users in Kazakhstan, both models are available in QueryWise without currency conversion or extra setup.

Either model is still an assistant, not a replacement for a doctor, lawyer, or financial adviser. Verify critical decisions against primary sources and with a qualified professional.