Phi-4 14B vs Qwen3.5-27B
Phi-4 14B (2024) and Qwen3.5-27B (2026) are frontier reasoning models from Microsoft Research and Alibaba. Phi-4 14B ships a 16k-token context window, while Qwen3.5-27B ships a 262k-token context window. On Google-Proof Q&A, Qwen3.5-27B leads by 29.7 pts. On pricing, Phi-4 14B costs $0.07/1M input tokens versus $0.20/1M for the alternative. This comparison covers specs, pricing, capabilities, benchmarks, provider availability, and production fit.
Phi-4 14B is ~200% cheaper at $0.07/1M; pay for Qwen3.5-27B only for reasoning depth.
Decision scorecard
Local evidence first| Signal | Phi-4 14B | Qwen3.5-27B |
|---|---|---|
| Best for | provider-routed production | reasoning-heavy apps, multimodal apps, and tool-calling agents |
| Decision fit | Classification and JSON / Tool use | RAG, Agents, and Long context |
| Context window | 16k | 262k |
| Cheapest output | $0.14/1M tokens | $1.56/1M tokens |
| Provider routes | 3 tracked | 4 tracked |
| Shared benchmarks | 1 rows | Google-Proof Q&A leader |
Decision tradeoffs
- Phi-4 14B has the lower cheapest tracked output price at $0.14/1M tokens.
- Local decision data tags Phi-4 14B for Classification and JSON / Tool use.
- Qwen3.5-27B leads the largest shared benchmark signal on Google-Proof Q&A by 29.7 points.
- Qwen3.5-27B has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Qwen3.5-27B has broader tracked provider coverage for fallback and procurement flexibility.
- Qwen3.5-27B uniquely exposes Vision, Multimodal, and Reasoning in local model data.
- Local decision data tags Qwen3.5-27B for RAG, Agents, and Long context.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Phi-4 14B
$87.00
Cheapest tracked route/tier: OpenRouter
Qwen3.5-27B
$546
Cheapest tracked route/tier: OpenRouter
Estimated monthly gap: $459. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- Provider overlap exists on OpenRouter; start route-level A/B tests there.
- Qwen3.5-27B is $1.42/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Qwen3.5-27B adds Vision, Multimodal, and Reasoning in local capability data.
- Provider overlap exists on OpenRouter; start route-level A/B tests there.
- Phi-4 14B is $1.42/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Vision, Multimodal, and Reasoning before moving production traffic.
Specs
| Specification | ||
|---|---|---|
| Released | 2024-12-13 | 2026-02-24 |
| Context window | 16k | 262k |
| Parameters | 14B | 27B |
| Architecture | decoder only | decoder only |
| License | Open Source | Apache 2.0 |
| Knowledge cutoff | 2024-06 | - |
Pricing and availability
| Pricing attribute | Phi-4 14B | Qwen3.5-27B |
|---|---|---|
| Input price | $0.07/1M tokens | $0.20/1M tokens |
| Output price | $0.14/1M tokens | $1.56/1M tokens |
| Providers |
Capabilities
| Capability | Phi-4 14B | Qwen3.5-27B |
|---|---|---|
| Vision | No | Yes |
| Multimodal | No | Yes |
| Reasoning | No | Yes |
| Function calling | No | Yes |
| Tool use | No | Yes |
| Structured outputs | Yes | Yes |
| Code execution | No | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
| Benchmark | Phi-4 14B | Qwen3.5-27B |
|---|---|---|
| Google-Proof Q&A | 56.1 | 85.8 |
Deep dive
On shared benchmark coverage, Google-Proof Q&A has Phi-4 14B at 56.1 and Qwen3.5-27B at 85.8, with Qwen3.5-27B ahead by 29.7 points. The largest visible gap is 29.7 points on Google-Proof Q&A, which matters most when that benchmark mirrors your workload. Treat isolated benchmark wins as directional, because provider routing, prompt style, and tool access can move real application results.
The capability footprint differs most on vision: Qwen3.5-27B, multimodal input: Qwen3.5-27B, reasoning mode: Qwen3.5-27B, function calling: Qwen3.5-27B, and tool use: Qwen3.5-27B. Both models share structured outputs, 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.
For cost, Phi-4 14B lists $0.07/1M input and $0.14/1M output tokens on the cheapest tracked provider, while Qwen3.5-27B lists $0.20/1M input and $1.56/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts Phi-4 14B lower by about $0.52 per million blended tokens. Availability is 3 providers versus 4, so concentration risk also matters.
Choose Phi-4 14B when provider fit and lower input-token cost are central to the workload. Choose Qwen3.5-27B when reasoning depth, larger context windows, 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.
FAQ
Which has a larger context window, Phi-4 14B or Qwen3.5-27B?
Qwen3.5-27B supports 262k tokens, while Phi-4 14B supports 16k tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Which is cheaper, Phi-4 14B or Qwen3.5-27B?
Phi-4 14B is cheaper on tracked token pricing. Phi-4 14B costs $0.07/1M input and $0.14/1M output tokens. Qwen3.5-27B costs $0.20/1M input and $1.56/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Phi-4 14B or Qwen3.5-27B open source?
Phi-4 14B is listed under Open Source. Qwen3.5-27B is listed under Apache 2.0. 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 14B or Qwen3.5-27B?
Qwen3.5-27B 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. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Which is better for multimodal input, Phi-4 14B or Qwen3.5-27B?
Qwen3.5-27B 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 14B and Qwen3.5-27B?
Phi-4 14B is available on OpenRouter, Fireworks AI, and Microsoft Foundry. Qwen3.5-27B is available on DeepInfra, OpenRouter, Alibaba Cloud PAI-EAS, and Novita AI. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
Continue comparing
Last reviewed: 2026-05-22. Data sourced from public model cards and provider documentation.