Phi 4 Multimodal Instruct vs Phi-4 Reasoning Vision 15B
Phi 4 Multimodal Instruct (2025) and Phi-4 Reasoning Vision 15B (2026) are compact production models from Microsoft Research. Phi 4 Multimodal Instruct ships a 128K-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 Phi 4 Multimodal Instruct when vision-heavy evaluation matters.
Decision scorecard
Local evidence first| Signal | Phi 4 Multimodal Instruct | Phi-4 Reasoning Vision 15B |
|---|---|---|
| Decision fit | Long context and Vision | Vision |
| Context window | 128K | — |
| Cheapest output | $0.9/1M tokens | - |
| Provider routes | 3 tracked | 0 tracked |
| Shared benchmarks | 0 rows | 0 rows |
Decision tradeoffs
- Phi 4 Multimodal Instruct has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Phi 4 Multimodal Instruct has broader tracked provider coverage for fallback and procurement flexibility.
- Phi 4 Multimodal Instruct uniquely exposes Vision in local model data.
- Local decision data tags Phi 4 Multimodal Instruct for Long context and Vision.
- 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 prices on this page.
Phi 4 Multimodal Instruct
$945
Cheapest tracked route: 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 Phi 4 Multimodal Instruct and Phi-4 Reasoning Vision 15B; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Vision before moving production traffic.
- No overlapping tracked provider route is sourced for Phi-4 Reasoning Vision 15B and Phi 4 Multimodal Instruct; plan for SDK, billing, or endpoint changes.
- Phi 4 Multimodal Instruct adds Vision in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-01-01 | 2026-03-12 |
| Context window | 128K | — |
| Parameters | — | 15B |
| Architecture | decoder only | - |
| License | Open Source | Microsoft Research |
| Knowledge cutoff | - | - |
Pricing and availability
| Pricing attribute | Phi 4 Multimodal Instruct | Phi-4 Reasoning Vision 15B |
|---|---|---|
| Input price | $0.9/1M tokens | - |
| Output price | $0.9/1M tokens | - |
| Providers | - |
Capabilities
| Capability | Phi 4 Multimodal Instruct | Phi-4 Reasoning Vision 15B |
|---|---|---|
| Vision | Yes | No |
| Multimodal | Yes | Yes |
| Reasoning | No | No |
| Function calling | No | No |
| Tool use | No | No |
| Structured outputs | No | No |
| Code execution | No | No |
Benchmarks
No shared benchmark rows are currently sourced for this pair.
Deep dive
The capability footprint differs most on vision: Phi 4 Multimodal Instruct. Both models share multimodal input, 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: Phi 4 Multimodal Instruct has $0.9/1M input tokens and Phi-4 Reasoning Vision 15B has no token price sourced yet. Provider availability is 3 tracked routes versus 0. Treat unknown pricing as an integration gap, then verify the route you will actually call before estimating production spend.
Choose Phi 4 Multimodal Instruct when vision-heavy evaluation 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 Phi 4 Multimodal Instruct or Phi-4 Reasoning Vision 15B open source?
Phi 4 Multimodal Instruct 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 vision, Phi 4 Multimodal Instruct or Phi-4 Reasoning Vision 15B?
Phi 4 Multimodal Instruct has the clearer documented vision signal in this comparison. If vision is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for multimodal input, Phi 4 Multimodal Instruct or Phi-4 Reasoning Vision 15B?
Both Phi 4 Multimodal Instruct and Phi-4 Reasoning Vision 15B expose multimodal input. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface.
Where can I run Phi 4 Multimodal Instruct and Phi-4 Reasoning Vision 15B?
Phi 4 Multimodal Instruct is available on Fireworks AI, NVIDIA NIM, and Microsoft Foundry. 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 Phi 4 Multimodal Instruct over Phi-4 Reasoning Vision 15B?
Phi-4 Reasoning Vision 15B is safer overall; choose Phi 4 Multimodal Instruct when vision-heavy evaluation matters. If your workload also depends on vision-heavy evaluation, start with Phi 4 Multimodal Instruct; if it depends on provider fit, run the same evaluation with Phi-4 Reasoning Vision 15B.
Continue comparing
Last reviewed: 2026-05-16. Data sourced from public model cards and provider documentation.