DeepSeek R1 0528 vs Phi-4 Mini Flash Reasoning
DeepSeek R1 0528 (2025) and Phi-4 Mini Flash Reasoning (2025) are frontier-tier reasoning models from DeepSeek and Microsoft Research. DeepSeek R1 0528 ships a 130k-token context window, while Phi-4 Mini Flash Reasoning ships a 128k-token context window. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads. It focuses on practical selection signals rather than broad model-family marketing.
Phi-4 Mini Flash Reasoning is safer overall; choose DeepSeek R1 0528 when coding workflow support matters.
Decision scorecard
Local evidence first| Signal | DeepSeek R1 0528 | Phi-4 Mini Flash Reasoning |
|---|---|---|
| Best for | reasoning-heavy apps and provider-routed production | reasoning-heavy apps |
| Decision fit | Coding, RAG, and Agents | Long context |
| Context window | 130k | 128k |
| Cheapest output | $2.15/1M tokens | - |
| Provider routes | 7 tracked | 1 tracked |
| Shared benchmarks | 0 shared | 0 shared |
Decision tradeoffs
- DeepSeek R1 0528 has the larger context window for long prompts, retrieval packs, or transcript analysis.
- DeepSeek R1 0528 has broader tracked provider coverage for fallback and route flexibility.
- DeepSeek R1 0528 uniquely exposes Structured outputs and Code execution in local model data.
- Local decision data tags DeepSeek R1 0528 for Coding, RAG, and Agents.
- Local decision data tags Phi-4 Mini Flash Reasoning for Long context.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
DeepSeek R1 0528
$938
Cheapest tracked route/tier: OpenRouter
Phi-4 Mini Flash Reasoning
Unavailable
No complete token price in local provider data
Cost delta unavailable until both models have sourced input and output token prices.
Switch friction
- No overlapping tracked provider route is sourced for DeepSeek R1 0528 and Phi-4 Mini Flash Reasoning; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Structured outputs and Code execution before moving production traffic.
- No overlapping tracked provider route is sourced for Phi-4 Mini Flash Reasoning and DeepSeek R1 0528; plan for SDK, billing, or endpoint changes.
- DeepSeek R1 0528 adds Structured outputs and Code execution in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-05-28 | 2025-12-01 |
| Context window | 130k | 128k |
| Parameters | 685B total, 37B active (MoE) | 3.8B |
| Architecture | Decoder Only | Decoder Only |
| License | MITOSI-approved | MITOSI-approved |
| Openness | Open source | Open source |
| Weights | Unknown | Unknown |
| Code | Unknown | Unknown |
| Commercial use | Commercial use: permitted | Commercial use: permitted |
| Knowledge cutoff | - | 2025-02 |
Pricing and availability
| Pricing attribute | DeepSeek R1 0528 | Phi-4 Mini Flash Reasoning |
|---|---|---|
| Input price | $0.50/1M tokens | - |
| Output price | $2.15/1M tokens | - |
| Providers |
Capabilities
| Capability | DeepSeek R1 0528 | Phi-4 Mini Flash Reasoning |
|---|---|---|
| Vision | No | No |
| Multimodal | No | No |
| Reasoning | Yes | Yes |
| JSON / Tool use | No | No |
| Structured outputs | Yes | No |
| Code execution | Yes | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
No shared benchmark scores are currently available for this pair.
Continue comparing
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Last reviewed: 2026-06-29. Data sourced from public model cards and provider documentation.