Doubao Pro 256K vs Phi-4 Reasoning Vision 15B
Doubao Pro 256K (2024) and Phi-4 Reasoning Vision 15B (2026) are general-purpose language models from ByteDance and Microsoft Research. Doubao Pro 256K ships a 256k-token context window, while Phi-4 Reasoning Vision 15B ships a not-yet-sourced 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 Doubao Pro 256K when provider fit matters.
Decision scorecard
Local evidence first| Signal | Doubao Pro 256K | Phi-4 Reasoning Vision 15B |
|---|---|---|
| Best for | general production evaluation | multimodal apps |
| Decision fit | Long context | Vision |
| Context window | 256k | — |
| Cheapest output | $1.32/1M tokens | - |
| Provider routes | 1 tracked | 0 tracked |
| Shared benchmarks | 0 shared | 0 shared |
Decision tradeoffs
- Doubao Pro 256K has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Doubao Pro 256K has broader tracked provider coverage for fallback and route flexibility.
- Local decision data tags Doubao Pro 256K for Long context.
- 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.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Doubao Pro 256K
$919
Cheapest tracked route/tier: Volcengine
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 Doubao Pro 256K 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.
- No overlapping tracked provider route is sourced for Phi-4 Reasoning Vision 15B and Doubao Pro 256K; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Vision and Multimodal before moving production traffic.
Specs
| Specification | ||
|---|---|---|
| Released | 2024-05-15 | 2026-03-12 |
| Context window | 256k | — |
| Parameters | — | 15B |
| Architecture | Decoder Only | - |
| License | Proprietary | MITOSI-approved |
| Openness | Proprietary | Open source |
| Weights | Not released | Unknown |
| Code | Unknown | Unknown |
| Commercial use | Commercial use: conditional | Commercial use: permitted |
| Knowledge cutoff | - | 2025-03 |
Pricing and availability
| Pricing attribute | Doubao Pro 256K | Phi-4 Reasoning Vision 15B |
|---|---|---|
| Input price | $0.73/1M tokens | - |
| Output price | $1.32/1M tokens | - |
| Providers | - |
Capabilities
| Capability | Doubao Pro 256K | Phi-4 Reasoning Vision 15B |
|---|---|---|
| Vision | No | Yes |
| Multimodal | No | Yes |
| Reasoning | No | No |
| JSON / 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 scores are currently available for this pair.
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Last reviewed: 2026-07-10. Data sourced from public model cards and provider documentation.