Phi-4-mini-reasoning is a lightweight open model designed for advanced mathematical reasoning and logic-intensive problem-solving. It is particularly well-suited for tasks such as formal proofs, symbolic computation, and solving multi-step word problems. With its efficient architecture, the model balances high-quality reasoning performance with cost-effective deployment, making it ideal for educational applications, embedded tutoring, and lightweight edge or mobile systems. Phi-4-mini-reasoning supports a 128K token context length, enabling it to process and reason over long mathematical problems and proofs. Built on synthetic and high-quality math datasets, the model leverages advanced fine-tuning techniques such as supervised fine-tuning and preference modeling to enhance reasoning capabilities. Its training incorporates safety and alignment protocols, ensuring robust and reliable performance across supported use cases.
Aihubmix Phi 4 Mini (reasoning) vs Grok 4.5
Output tokens cost $0.12 per million on Aihubmix Phi 4 Mini (reasoning) and $6.00 per million on Grok 4.5. Input tokens cost $0.12 per million on Aihubmix Phi 4 Mini (reasoning) and $2.00 per million on Grok 4.5. Cached input tokens are billed at $0.12 per million on Aihubmix Phi 4 Mini (reasoning) and $0.50 per million on Grok 4.5. Context lengths are 128,000 tokens on Aihubmix Phi 4 Mini (reasoning) and 500,000 tokens on Grok 4.5. On the LMArena coding leaderboard Aihubmix Phi 4 Mini (reasoning) scores 1306 and Grok 4.5 scores 1523.
Grok 4.5 was trained on datasets spanning knowledge in coding, science, engineering, and math. With both intelligent and efficient reasoning, Grok 4.5 excels at real engineering tasks and exceeds comparable leading models at these tasks.
Pricing & Specifications
Prices are per million tokens. Time to First Token and throughput are rolling averages measured on AIHubMix.
Promotional prices show the discounted rate; see each model page for promotion windows.
Activity Past 30 Days
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Performance Past 3 Days
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LMArena Benchmarks
LMArena ratings by capability (Bradley-Terry, commonly called Elo). Higher is better.
Source: LMArena (arena.ai) leaderboard, imported by AIHubMix. Models without published ratings are omitted per chart.
Cost calculator
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Monthly = daily × 30. Discounted rates applied where a promotion is active.
FAQ
Which is cheaper: Aihubmix Phi 4 Mini (reasoning), Grok 4.5?
Aihubmix Phi 4 Mini (reasoning): $0.12/M output tokens; Grok 4.5: $6.00/M. Use the cost calculator above to estimate your own workload.
How do their coding arena scores compare?
Grok 4.5: 1523; Aihubmix Phi 4 Mini (reasoning): 1306 (LMArena coding leaderboard).
How large is each context window?
Aihubmix Phi 4 Mini (reasoning) accepts 128,000 and Grok 4.5 accepts 500,000 input tokens. Maximum output per request is 4,000 tokens on Aihubmix Phi 4 Mini (reasoning) and 500,000 tokens on Grok 4.5.
What inputs and capabilities does each model support?
Aihubmix Phi 4 Mini (reasoning) accepts text input; Grok 4.5 accepts text and image input and supports thinking, tool calling, function calling, structured outputs and long context.
Can I call Aihubmix Phi 4 Mini (reasoning) and Grok 4.5 with the same API key?
Yes. AIHubMix serves every model on this page behind one OpenAI-compatible endpoint, so switching between them is a one-line change to the model field — no second account, key or SDK.
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