DeepSeek R1 Basic vs Phi-4 Reasoning Vision 15B
DeepSeek R1 Basic (2025) and Phi-4 Reasoning Vision 15B (2026) are frontier reasoning models from DeepSeek and Microsoft Research. DeepSeek R1 Basic ships a 160K-token context window, while Phi-4 Reasoning Vision 15B ships a not-yet-sourced 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 Reasoning Vision 15B is safer overall; choose DeepSeek R1 Basic when reasoning depth matters.
Decision scorecard
Local evidence first| Signal | DeepSeek R1 Basic | Phi-4 Reasoning Vision 15B |
|---|---|---|
| Best for | reasoning-heavy apps | multimodal apps |
| Decision fit | Long context | Vision |
| Context window | 160K | — |
| Cheapest output | $1.68/1M tokens | - |
| Provider routes | 1 tracked | 0 tracked |
| Shared benchmarks | 0 rows | 0 rows |
Decision tradeoffs
- DeepSeek R1 Basic has the larger context window for long prompts, retrieval packs, or transcript analysis.
- DeepSeek R1 Basic has broader tracked provider coverage for fallback and procurement flexibility.
- DeepSeek R1 Basic uniquely exposes Reasoning in local model data.
- Local decision data tags DeepSeek R1 Basic for Long context.
- Phi-4 Reasoning Vision 15B uniquely exposes Multimodal in local model data.
- Local decision data tags Phi-4 Reasoning Vision 15B for Vision.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
DeepSeek R1 Basic
$868
Cheapest tracked route/tier: Fireworks AI
Phi-4 Reasoning Vision 15B
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 Basic and Phi-4 Reasoning Vision 15B; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Reasoning before moving production traffic.
- Phi-4 Reasoning Vision 15B adds Multimodal in local capability data.
- No overlapping tracked provider route is sourced for Phi-4 Reasoning Vision 15B and DeepSeek R1 Basic; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Multimodal before moving production traffic.
- DeepSeek R1 Basic adds Reasoning in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-01-01 | 2026-03-12 |
| Context window | 160K | — |
| Parameters | 671B | 15B |
| Architecture | decoder only | - |
| License | Open Source | Microsoft Research |
| Knowledge cutoff | - | 2025-03 |
Pricing and availability
| Pricing attribute | DeepSeek R1 Basic | Phi-4 Reasoning Vision 15B |
|---|---|---|
| Input price | $0.56/1M tokens | - |
| Output price | $1.68/1M tokens | - |
| Providers | - |
Capabilities
| Capability | DeepSeek R1 Basic | Phi-4 Reasoning Vision 15B |
|---|---|---|
| Vision | No | No |
| Multimodal | No | Yes |
| Reasoning | Yes | No |
| Function calling | No | No |
| Tool use | No | No |
| Structured outputs | No | No |
| Code execution | No | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
No shared benchmark rows are currently sourced for this pair.
Deep dive
The capability footprint differs most on multimodal input: Phi-4 Reasoning Vision 15B and reasoning mode: DeepSeek R1 Basic. 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: DeepSeek R1 Basic has $0.56/1M input tokens and Phi-4 Reasoning Vision 15B has no token price sourced yet. Provider availability is 1 tracked routes versus 0. Treat unknown pricing as an integration gap, then verify the route you will actually call before estimating production spend.
Choose DeepSeek R1 Basic when reasoning depth and broader provider choice are central to the workload. Choose Phi-4 Reasoning Vision 15B when provider fit 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 DeepSeek R1 Basic or Phi-4 Reasoning Vision 15B open source?
DeepSeek R1 Basic is listed under Open Source. Phi-4 Reasoning Vision 15B is listed under Microsoft Research. 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 multimodal input, DeepSeek R1 Basic or Phi-4 Reasoning Vision 15B?
Phi-4 Reasoning Vision 15B has the clearer documented multimodal input signal in this comparison. If multimodal input is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for reasoning mode, DeepSeek R1 Basic or Phi-4 Reasoning Vision 15B?
DeepSeek R1 Basic 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 DeepSeek R1 Basic and Phi-4 Reasoning Vision 15B?
DeepSeek R1 Basic is available on Fireworks AI. Phi-4 Reasoning Vision 15B is available on the tracked providers still being sourced. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
When should I pick DeepSeek R1 Basic over Phi-4 Reasoning Vision 15B?
Phi-4 Reasoning Vision 15B is safer overall; choose DeepSeek R1 Basic when reasoning depth matters. If your workload also depends on reasoning depth, start with DeepSeek R1 Basic; if it depends on provider fit, run the same evaluation with Phi-4 Reasoning Vision 15B.
Continue comparing
Last reviewed: 2026-05-19. Data sourced from public model cards and provider documentation.