GPT-OSS 120B or Grok 4.5 — which is better?

The QueryWise comparison between GPT-OSS 120B and Grok 4.5 is fairly clear-cut. GPT-OSS 120B ranks 22 with a current score of 5.2 out of 10. Grok 4.5 is in 6 place with 9.2. This is not a matter of taste: our data shows a meaningful distance between the two models.

Both models are available to users in Kazakhstan. QueryWise lets you pay in tenge, choose a Russian or Kazakh interface, and get three free questions when you start. We added Grok 4.5 on its release day, and since then we have focused not on the developer’s promises but on real answers in identical scenarios.

Quality: Grok 4.5 is clearly ahead

Grok 4.5 leads on the current overall score. GPT-OSS 120B has a rating of 5.2, while Grok 4.5 has 9.2. The breakdown makes the difference even clearer: GPT-OSS 120B scores 5.1 in coding, compared with 9.4 for Grok 4.5. For writing functions, finding bugs, and reviewing an existing project, Grok 4.5’s advantage is practical rather than merely formal.

GPT-OSS 120B scores 9.9 for reasoning, while Grok 4.5 scores 9.2. This is one of GPT-OSS 120B’s strengths. It can carefully parse task requirements, uncover hidden constraints, and break down a complex question step by step. But strong reasoning alone is not enough when you still have to verify the answer in code or ask the model to redo the result.

Grok 4.5 currently ranks 6 in QueryWise. Ahead of it is Claude Fable 5 with a score of 9.8, while nearby benchmarks include Claude Fable 5, GPT-5.6 Sol, and Kimi K3. GPT-OSS 120B sits noticeably lower. That context matters: the OpenAI model is not a failure, but it still has a long way to go to catch the leaders.

Speed and price in tenge

Grok 4.5 has a median response time of 16 seconds, with 100% reliability according to our telemetry. For users, that means a predictable workflow: send a long prompt, wait briefly, and get an answer without constant retries.

There is not yet enough data on GPT-OSS 120B’s median speed. The same applies to reliability: QueryWise is still collecting statistics. It would therefore be misleading to promise that it will be faster or more stable than Grok 4.5.

An average question costs approximately 10 ₸ with GPT-OSS 120B and 10 ₸ with Grok 4.5. With that difference, price should not be the main basis for your choice: answer quality matters more. GPT-OSS 120B may be a sensible option for short tasks, but the savings disappear quickly if you need to clarify the prompt or fix the output manually.

Context and task types

GPT-OSS 120B has a context window of 131K, compared with 500K for Grok 4.5. Grok 4.5 is better suited to large materials: you can upload lengthy technical documentation, several project files, or a substantial contract and ask it to identify connections between sections. This is especially useful when a question cannot be answered from a single paragraph.

GPT-OSS 120B is a better fit for tasks that depend on consistent logic. For example, you can ask it to check a probability solution, explain an error in a formula, or compare two approaches to a research project. Its reasoning score is 9.9, and that shows in carefully worded educational prompts.

For coding, the winner is more obvious: Grok 4.5, with a score of 9.4, is better at refactoring a Python service, writing an SQL query for a specific schema, and finding the cause of failing tests. GPT-OSS 120B, at 5.1, can produce a useful draft, but the final version more often needs review.

There is also a simple way to avoid guessing. In QueryWise, both models answer the same question side by side, so you can see where they agree and where one has missed a condition or invented unnecessary details. For exam preparation, technical interviews, or architecture decisions, this is more useful than reading one answer and taking it on faith.

A fair verdict

If you want the best all-purpose option by the current ranking, choose Grok 4.5: this model leads on the overall score of Grok 4.5. For programming, the winner is Grok 4.5 because 9.4 is higher than 5.1. Grok 4.5 also wins for long documents thanks to its 500K context window.

GPT-OSS 120B is worth trying when the main task is reasoning, educational explanation, or analyzing requirements. Its 9.9 versus 9.2 for Grok 4.5 is a serious argument in specific scenarios. But it cannot be called the best in this comparison: the overall result, 5.2 versus 9.2, favors Grok 4.5.

For everyday work in QueryWise, I would choose Grok 4.5. GPT-OSS 120B is useful as a second opinion and an inexpensive assistant for logic-heavy tasks. Both models remain assistants, not medical, legal, or financial advisors: important decisions should be checked against primary sources and with a qualified professional.