Phi 3.5 MoE Instruct vs Together AI Qwen2-72B-Instruct
Phi 3.5 MoE Instruct (2024) and Together AI Qwen2-72B-Instruct (2024) are compact production models from Microsoft Research and Alibaba. Phi 3.5 MoE Instruct ships a 128K-token context window, while Together AI Qwen2-72B-Instruct ships a 33K-token context window. On pricing, Phi 3.5 MoE Instruct costs $0.5/1M input tokens versus $0.7/1M for the alternative. This comparison covers specs, pricing, capabilities, benchmarks, provider availability, and production fit.
Phi 3.5 MoE Instruct is safer overall; choose Together AI Qwen2-72B-Instruct when provider fit matters.
Specs
| Released | 2024-08-20 | 2024-06-07 |
| Context window | 128K | 33K |
| Parameters | 16x3.8B (42B, 6.6B active) | 72B |
| Architecture | decoder only | decoder only |
| License | MIT | Open Source |
| Knowledge cutoff | - | - |
Pricing and availability
| Phi 3.5 MoE Instruct | Together AI Qwen2-72B-Instruct | |
|---|---|---|
| Input price | $0.5/1M tokens | $0.7/1M tokens |
| Output price | $0.5/1M tokens | $0.7/1M tokens |
| Providers |
Capabilities
| Phi 3.5 MoE Instruct | Together AI Qwen2-72B-Instruct | |
|---|---|---|
| Vision | ||
| Multimodal | ||
| Reasoning | ||
| Function calling | ||
| Tool use | ||
| Structured outputs | ||
| Code execution |
Benchmarks
No shared benchmark rows are currently sourced for this pair.
Deep dive
The capability footprint differs most on structured outputs: Together AI Qwen2-72B-Instruct. 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.
For cost, Phi 3.5 MoE Instruct lists $0.5/1M input and $0.5/1M output tokens, while Together AI Qwen2-72B-Instruct lists $0.7/1M input and $0.7/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts Phi 3.5 MoE Instruct lower by about $0.2 per million blended tokens. Availability is 1 providers versus 1, so concentration risk also matters.
Choose Phi 3.5 MoE Instruct when long-context analysis, larger context windows, and lower input-token cost are central to the workload. Choose Together AI Qwen2-72B-Instruct 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.
FAQ
Which has a larger context window, Phi 3.5 MoE Instruct or Together AI Qwen2-72B-Instruct?
Phi 3.5 MoE Instruct supports 128K tokens, while Together AI Qwen2-72B-Instruct supports 33K tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Which is cheaper, Phi 3.5 MoE Instruct or Together AI Qwen2-72B-Instruct?
Phi 3.5 MoE Instruct is cheaper on tracked token pricing. Phi 3.5 MoE Instruct costs $0.5/1M input and $0.5/1M output tokens. Together AI Qwen2-72B-Instruct costs $0.7/1M input and $0.7/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Phi 3.5 MoE Instruct or Together AI Qwen2-72B-Instruct open source?
Phi 3.5 MoE Instruct is listed under MIT. Together AI Qwen2-72B-Instruct is listed under Open Source. 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 structured outputs, Phi 3.5 MoE Instruct or Together AI Qwen2-72B-Instruct?
Together AI Qwen2-72B-Instruct has the clearer documented structured outputs signal in this comparison. If structured outputs is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Where can I run Phi 3.5 MoE Instruct and Together AI Qwen2-72B-Instruct?
Phi 3.5 MoE Instruct is available on Fireworks AI. Together AI Qwen2-72B-Instruct is available on Together AI. Provider coverage can affect latency, region availability, compliance posture, and fallback options. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
When should I pick Phi 3.5 MoE Instruct over Together AI Qwen2-72B-Instruct?
Phi 3.5 MoE Instruct is safer overall; choose Together AI Qwen2-72B-Instruct when provider fit matters. If your workload also depends on long-context analysis, start with Phi 3.5 MoE Instruct; if it depends on provider fit, run the same evaluation with Together AI Qwen2-72B-Instruct.
Continue comparing
Last reviewed: 2026-04-24. Data sourced from public model cards and provider documentation.