GPT-5.4 mini or Claude Opus 5.5 — which is better?

Quality: the difference is no longer marginal

In the QueryWise ranking, GPT-5.4 mini currently sits in 31 place with a score of 5.4 out of 10. Claude Opus 5.5 is in 1 place with 9.9 out of 10. Based on the current score, Claude Opus 5.5 is ahead: this is not a matter of taste, but the direct result of the QueryWise ranking.

GPT-5.4 mini has published scores for individual areas: coding scores 7.5, while reasoning scores 8.6. Separate coding and reasoning figures for Claude Opus 5.5 are not disclosed in the current dataset, so it would be unfair to declare it the winner on either scale. By the overall assessment, which includes how the model performs on QueryWise, Claude Opus 5.5 is still in the lead.

We tested GPT-5.4 mini with real questions, including this prompt: “Compare two Python snippets, find the bug in the empty-list handling, and suggest tests.” The model analyzed the requirement confidently, provided a fix, and explained why the original check fails. That is a strong result for a low-cost model. To evaluate Claude Opus 5.5 fairly, use the same prompt and then add a large context containing several related files: that is where its extra context capacity becomes a practical advantage.

Price in tenge and response speed

The average price of a GPT-5.4 mini question on QueryWise is approximately 10 ₸, compared with about 18 ₸ for Claude Opus 5.5. The difference becomes noticeable with regular use. Ten questions to the first model would cost roughly 10 × 10 ₸, while the same set of prompts to Claude would cost 10 × 18 ₸. For short everyday tasks and quick drafts, GPT-5.4 mini looks like the more rational choice.

So it is not worth paying extra for Claude solely in the hope of lower latency. The price is clear; any speed advantage still needs more data.

Both models are available from Kazakhstan on QueryWise: payments are made in tenge, the interface is available in Russian and Kazakh, and new users get three free questions to start. You can send the same prompt to both models and see where they agree and where they differ. For an expensive work request, that is more useful than a marketing promise.

Context and task types

GPT-5.4 mini works with a context of 400K, while Claude Opus 5.5 supports 1M. The difference becomes meaningful when a question turns into a large bundle of materials. For example, GPT-5.4 mini may be a convenient and economical option for reviewing a 40-page contract when you need a list of disputed clauses. For analyzing the contract alongside correspondence, attachments, and several revision versions, Claude Opus 5.5 looks more convincing thanks to its larger context window.

In coding, GPT-5.4 mini already scores 7.5. You can choose it when you need to debug a small service in an evening, write an SQL query, or explain someone else’s function. For a major refactor that requires keeping the architecture of several files in mind without losing the project’s constraints, Claude Opus 5.5 is preferable according to the overall QueryWise assessment.

For studying, the difference depends on how you frame the request. GPT-5.4 mini works well when you need a quick plain-language explanation, a study plan, or a solution checked. Choose Claude Opus 5.5 for a long-form set of notes—for example, when you need to combine a lecture, 80 pages of a textbook, and a list of exam questions into one coherent analysis.

Choose honestly for your scenario

If your main criterion is the highest quality in the current QueryWise ranking, choose Claude Opus 5.5. Its lead is supported by a result of 9.9 versus 5.4 for GPT-5.4 mini. If the question is complex, the material is extensive, and an error in the conclusion could be costly, the additional price of Claude Opus 5.5 is justified.

If you need to save money across a large number of short requests, GPT-5.4 mini is more practical: it costs about 10 ₸ versus approximately 18 ₸ per average question. For drafts, code explanations, and everyday study, it is a strong budget option. However, it is weaker than Claude Opus 5.5 overall, so you should not replace Claude with it for every task without qualification.

My verdict is simple: Claude Opus 5.5 wins on quality and complex tasks, while GPT-5.4 mini wins on price and accessibility for frequent short requests. On QueryWise, the best approach is to start with the three free questions and then pay for the model whose errors—or savings—matter more for your particular task. Neither model replaces a doctor, lawyer, or financial adviser.