Phi-4 Reasoning Vision 15B vs Seed-OSS 36B Instruct
Phi-4 Reasoning Vision 15B (2026) and Seed-OSS 36B Instruct (2025) are compact production models from Microsoft Research and ByteDance. Phi-4 Reasoning Vision 15B ships a not-yet-sourced context window, while Seed-OSS 36B Instruct ships a 4k-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 Reasoning Vision 15B is safer overall; choose Seed-OSS 36B Instruct when provider fit matters.
Decision scorecard
Local evidence first| Signal | Phi-4 Reasoning Vision 15B | Seed-OSS 36B Instruct |
|---|---|---|
| Best for | multimodal apps | general production evaluation |
| Decision fit | Vision | General |
| Context window | — | 4k |
| Cheapest output | - | - |
| Provider routes | 0 tracked | 1 tracked |
| Shared benchmarks | 0 rows | 0 rows |
Decision tradeoffs
- Phi-4 Reasoning Vision 15B uniquely exposes Vision and Multimodal in local model data.
- Local decision data tags Phi-4 Reasoning Vision 15B for Vision.
- Seed-OSS 36B Instruct has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Seed-OSS 36B Instruct has broader tracked provider coverage for fallback and procurement flexibility.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Phi-4 Reasoning Vision 15B
Unavailable
No complete token price in local provider data
Seed-OSS 36B Instruct
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 Reasoning Vision 15B and Seed-OSS 36B Instruct; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Vision and Multimodal before moving production traffic.
- No overlapping tracked provider route is sourced for Seed-OSS 36B Instruct and Phi-4 Reasoning Vision 15B; plan for SDK, billing, or endpoint changes.
- Phi-4 Reasoning Vision 15B adds Vision and Multimodal in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-03-12 | 2025-06-01 |
| Context window | — | 4k |
| Parameters | 15B | 36B |
| Architecture | - | decoder only |
| License | MIT(OSI) | Proprietary |
| Openness | Open source | Proprietary |
| Commercial use | Commercial use allowed | Commercial use with conditions |
| Knowledge cutoff | 2025-03 | 2024-10 |
Pricing and availability
| Pricing attribute | Phi-4 Reasoning Vision 15B | Seed-OSS 36B Instruct |
|---|---|---|
| Input price | - | - |
| Output price | - | - |
| Providers | - |
Pricing not yet sourced for either model.
Capabilities
| Capability | Phi-4 Reasoning Vision 15B | Seed-OSS 36B Instruct |
|---|---|---|
| Vision | Yes | No |
| Multimodal | Yes | No |
| Reasoning | No | 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 vision: Phi-4 Reasoning Vision 15B and multimodal input: Phi-4 Reasoning Vision 15B. 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: Phi-4 Reasoning Vision 15B has no token price sourced yet and Seed-OSS 36B Instruct 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 Phi-4 Reasoning Vision 15B when vision-heavy evaluation are central to the workload. Choose Seed-OSS 36B Instruct when provider fit 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.
FAQ
Is Phi-4 Reasoning Vision 15B or Seed-OSS 36B Instruct open source?
Phi-4 Reasoning Vision 15B is listed under MIT. Seed-OSS 36B Instruct is listed under Proprietary. 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 Reasoning Vision 15B or Seed-OSS 36B Instruct?
Phi-4 Reasoning Vision 15B 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 Reasoning Vision 15B or Seed-OSS 36B Instruct?
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.
Where can I run Phi-4 Reasoning Vision 15B and Seed-OSS 36B Instruct?
Phi-4 Reasoning Vision 15B is available on the tracked providers still being sourced. Seed-OSS 36B Instruct is available on NVIDIA NIM. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
When should I pick Phi-4 Reasoning Vision 15B over Seed-OSS 36B Instruct?
Phi-4 Reasoning Vision 15B is safer overall; choose Seed-OSS 36B Instruct when provider fit matters. If your workload also depends on vision-heavy evaluation, start with Phi-4 Reasoning Vision 15B; if it depends on provider fit, run the same evaluation with Seed-OSS 36B Instruct.
Continue comparing
Last reviewed: 2026-06-04. Data sourced from public model cards and provider documentation.