Claude Haiku 4.5 vs GPT-5.6 Sol: which is better?

The comparison is straightforward: Claude Haiku 4.5 is Anthropic’s compact model, while GPT-5.6 Sol is a more powerful OpenAI option with a larger context window. Both are available in QueryWise from Kazakhstan: payments are made in tenge, the interface is available in Russian and Kazakh, and new users receive three free questions.

We added Claude Haiku 4.5 to QueryWise on release day and immediately tested it with everyday scenarios: coding, explaining complex topics, editing text, and handling long inputs. The impression was mixed: the model is fast in its responses and inexpensive, but it needs more supervision for difficult reasoning.

Quality: GPT-5.6 Sol has the edge

In the current QueryWise ranking, Claude Haiku 4.5 scores 5.2 and ranks 23. GPT-5.6 Sol is higher: 9.8 and rank 2. So GPT-5.6 Sol leads on the overall score. This is not an abstract difference in marketing copy: it becomes clear when a question has several conditions and requires not just an answer, but verification of the intermediate steps.

For coding, Claude Haiku 4.5 scores 8.0, while GPT-5.6 Sol scores 9.9. Haiku handles small functions, obvious bug fixes, regular expressions, and explanations of existing code well. If the task is limited to one file and a clear test, the more expensive model may be overkill.

The picture changes for reasoning: Claude scores 5.4, while GPT-5.6 Sol scores 9.5. In practice, this matters for tasks with multiple constraints: calculating a travel budget, analyzing a table with contradictory data, or finding the cause of a failure across a chain of actions. Here, GPT-5.6 Sol is more likely to preserve the original conditions and less likely to improvise confidently but incorrectly.

Speed and price in tenge

According to QueryWise telemetry, GPT-5.6 Sol’s median response time is 17 seconds. For Claude Haiku 4.5, the current figure should be read as —: there is not yet enough data for a stable conclusion. This caveat matters. It would be unfair to call Haiku faster simply because of its name or model size.

An average Claude question costs about 10 ₸, while GPT-5.6 Sol costs around 25 ₸. The difference becomes noticeable at scale: drafting emails, producing dozens of short translations, or preparing headline options. For a single complex request, GPT-5.6 Sol’s price is reasonable if a mistake would cost more than a few dozen tenge. For frequent small requests, Claude Haiku 4.5 is the clear money-saving choice.

Speed is not the only criterion. Sometimes it is better to wait for an answer you can use immediately than to get a quick draft and then recheck every important detail.

Context and task types

Claude Haiku 4.5 has a context window of 200K, compared with 1.1M for GPT-5.6 Sol. That extra capacity is especially useful when working with long documents, large repositories, and multiple files in a single request. For a short syntax question, the difference barely matters.

When Claude Haiku 4.5 makes more sense

• quickly writing a small Python or JavaScript script;
• rewriting a customer email in Russian or Kazakh;
• creating a series of affordable drafts, lists, and short explanations.

For a student who needs to understand a homework bug or get a first solution draft, Haiku will often be enough. Still, every answer should be checked, especially when it involves safety, medical advice, law, or money.

When GPT-5.6 Sol justifies its price

GPT-5.6 Sol is the better choice for major refactoring, analyzing multiple documents, and tasks that require connecting facts from different parts of a prompt. For example, you can provide an API description, a server-side code fragment, and an error log—the model is more likely to form a coherent hypothesis instead of fixing only the last line.

It is also useful for exam preparation: rather than merely explaining a formula, it can create a solution plan, check intermediate calculations, and show where the result changes when the initial data changes. For editorial work, GPT-5.6 Sol is more convenient when you need to preserve facts from a long source while changing the text structure at the same time.

The honest verdict

GPT-5.6 Sol leads on the current score. GPT-5.6 Sol is my choice for complex code, long-form content, data analysis, and tasks where the cost of an error is higher than the cost of a request. Its current quality, coding, and reasoning scores support that choice.

Claude Haiku 4.5 wins in a different scenario: lots of short requests, a limited budget, and straightforward tasks without a long chain of reasoning. At around 10 ₸ per question, it is more practical for everyday drafts and simple code edits.

In QueryWise, you can send the same question to both models and see where they agree and where they differ. That is more useful than any universal ranking. My conclusion: GPT-5.6 Sol is the best overall choice right now, while Claude Haiku 4.5 is a good budget assistant if you understand the limits of its verification.