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Aquila 2 34B vs Phi-4 Mini Flash Reasoning

Aquila 2 34B (2023) and Phi-4 Mini Flash Reasoning (2025) are frontier reasoning models from Beijing Academy of Artificial Intelligence (BAAI) and Microsoft Research. Aquila 2 34B ships a not-yet-sourced context window, while Phi-4 Mini Flash Reasoning ships a 128K-token context window. This comparison covers specs, pricing, capabilities, benchmarks, provider availability, and production fit. It focuses on practical selection signals rather than broad model-family marketing.

Phi-4 Mini Flash Reasoning is safer overall; choose Aquila 2 34B when provider fit matters.

Specs

Specification
Released2023-11-022025-12-01
Context window128K
Parameters34B
Architecturedecoder onlydecoder only
LicenseUnknown1
Knowledge cutoff--

Pricing and availability

Pricing attributeAquila 2 34BPhi-4 Mini Flash Reasoning
Input price--
Output price--
Providers-

Pricing not yet sourced for either model.

Capabilities

CapabilityAquila 2 34BPhi-4 Mini Flash Reasoning
VisionNoNo
MultimodalNoNo
ReasoningNoYes
Function callingNoNo
Tool useNoNo
Structured outputsNoNo
Code executionNoNo

Benchmarks

No shared benchmark rows are currently sourced for this pair.

Deep dive

The capability footprint differs most on reasoning mode: Phi-4 Mini Flash Reasoning. Both models share the core language-model surface, so the practical split is not just feature count. Use those differences to decide whether the page is about raw model quality, agentic coding support, multimodal ingestion, or predictable structured API behavior.

Pricing coverage is uneven: Aquila 2 34B has no token price sourced yet and Phi-4 Mini Flash Reasoning has no token price sourced yet. Provider availability is 0 tracked routes versus 1. Treat unknown pricing as an integration gap, then verify the route you will actually call before estimating production spend.

Choose Aquila 2 34B when provider fit are central to the workload. Choose Phi-4 Mini Flash Reasoning when reasoning depth and broader provider choice are more important. For production, rerun your own prompts through the exact provider, region, and tool stack you plan to ship. This keeps the decision grounded in measurable tradeoffs instead of brand-level assumptions. It also helps separate model capability from provider packaging, which can change cost and latency. For teams standardizing a stack, that distinction is often the difference between a benchmark win and a reliable deployment.

FAQ

Is Aquila 2 34B or Phi-4 Mini Flash Reasoning open source?

Aquila 2 34B is listed under Unknown. Phi-4 Mini Flash Reasoning is listed under 1. License labels affect whether you can self-host, redistribute weights, or rely only on hosted APIs, so confirm the upstream license before deployment.

Which is better for reasoning mode, Aquila 2 34B or Phi-4 Mini Flash Reasoning?

Phi-4 Mini Flash Reasoning has the clearer documented reasoning mode signal in this comparison. If reasoning mode is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.

Where can I run Aquila 2 34B and Phi-4 Mini Flash Reasoning?

Aquila 2 34B is available on the tracked providers still being sourced. Phi-4 Mini Flash Reasoning is available on NVIDIA NIM. Provider coverage can affect latency, region availability, compliance posture, and fallback options.

When should I pick Aquila 2 34B over Phi-4 Mini Flash Reasoning?

Phi-4 Mini Flash Reasoning is safer overall; choose Aquila 2 34B when provider fit matters. If your workload also depends on provider fit, start with Aquila 2 34B; if it depends on reasoning depth, run the same evaluation with Phi-4 Mini Flash Reasoning.

Continue comparing

Last reviewed: 2026-05-01. Data sourced from public model cards and provider documentation.