Phi-4 Mini Flash Reasoning vs Together AI Deepseek-LLM-67B-Chat
Phi-4 Mini Flash Reasoning (2025) and Together AI Deepseek-LLM-67B-Chat (2024) are frontier reasoning models from Microsoft Research and DeepSeek. Phi-4 Mini Flash Reasoning ships a 128K-token context window, while Together AI Deepseek-LLM-67B-Chat ships a 4K-token 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 Mini Flash Reasoning fits 31x more tokens; pick it for long-context work and Together AI Deepseek-LLM-67B-Chat for tighter calls.
Decision scorecard
Local evidence first| Signal | Phi-4 Mini Flash Reasoning | Together AI Deepseek-LLM-67B-Chat |
|---|---|---|
| Decision fit | Long context | Classification and JSON / Tool use |
| Context window | 128K | 4K |
| Cheapest output | - | $0.6/1M tokens |
| Provider routes | 1 tracked | 1 tracked |
| Shared benchmarks | 0 rows | 0 rows |
Decision tradeoffs
- Phi-4 Mini Flash Reasoning has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Phi-4 Mini Flash Reasoning uniquely exposes Reasoning in local model data.
- Local decision data tags Phi-4 Mini Flash Reasoning for Long context.
- Together AI Deepseek-LLM-67B-Chat uniquely exposes Structured outputs in local model data.
- Local decision data tags Together AI Deepseek-LLM-67B-Chat for Classification and JSON / Tool use.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output prices on this page.
Phi-4 Mini Flash Reasoning
Unavailable
No complete token price in local provider data
Together AI Deepseek-LLM-67B-Chat
$630
Cheapest tracked route: Together AI
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 Mini Flash Reasoning and Together AI Deepseek-LLM-67B-Chat; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Reasoning before moving production traffic.
- Together AI Deepseek-LLM-67B-Chat adds Structured outputs in local capability data.
- No overlapping tracked provider route is sourced for Together AI Deepseek-LLM-67B-Chat and Phi-4 Mini Flash Reasoning; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Structured outputs before moving production traffic.
- Phi-4 Mini Flash Reasoning adds Reasoning in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-12-01 | 2024-01-09 |
| Context window | 128K | 4K |
| Parameters | — | 67B |
| Architecture | decoder only | decoder only |
| License | 1 | Open Source |
| Knowledge cutoff | - | - |
Pricing and availability
| Pricing attribute | Phi-4 Mini Flash Reasoning | Together AI Deepseek-LLM-67B-Chat |
|---|---|---|
| Input price | - | $0.6/1M tokens |
| Output price | - | $0.6/1M tokens |
| Providers |
Capabilities
| Capability | Phi-4 Mini Flash Reasoning | Together AI Deepseek-LLM-67B-Chat |
|---|---|---|
| Vision | No | No |
| Multimodal | No | No |
| Reasoning | Yes | No |
| Function calling | No | No |
| Tool use | No | No |
| Structured outputs | No | Yes |
| Code execution | No | No |
Benchmarks
No shared benchmark rows are currently sourced for this pair.
Deep dive
The capability footprint differs most on reasoning mode: Phi-4 Mini Flash Reasoning and structured outputs: Together AI Deepseek-LLM-67B-Chat. 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 Mini Flash Reasoning has no token price sourced yet and Together AI Deepseek-LLM-67B-Chat has $0.6/1M input tokens. Provider availability is 1 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 Mini Flash Reasoning when reasoning depth and larger context windows are central to the workload. Choose Together AI Deepseek-LLM-67B-Chat 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
Which has a larger context window, Phi-4 Mini Flash Reasoning or Together AI Deepseek-LLM-67B-Chat?
Phi-4 Mini Flash Reasoning supports 128K tokens, while Together AI Deepseek-LLM-67B-Chat supports 4K tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Is Phi-4 Mini Flash Reasoning or Together AI Deepseek-LLM-67B-Chat open source?
Phi-4 Mini Flash Reasoning is listed under 1. Together AI Deepseek-LLM-67B-Chat 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 reasoning mode, Phi-4 Mini Flash Reasoning or Together AI Deepseek-LLM-67B-Chat?
Phi-4 Mini Flash Reasoning has the clearer documented reasoning mode signal in this comparison. If reasoning mode is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for structured outputs, Phi-4 Mini Flash Reasoning or Together AI Deepseek-LLM-67B-Chat?
Together AI Deepseek-LLM-67B-Chat 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-4 Mini Flash Reasoning and Together AI Deepseek-LLM-67B-Chat?
Phi-4 Mini Flash Reasoning is available on NVIDIA NIM. Together AI Deepseek-LLM-67B-Chat 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-4 Mini Flash Reasoning over Together AI Deepseek-LLM-67B-Chat?
Phi-4 Mini Flash Reasoning fits 31x more tokens; pick it for long-context work and Together AI Deepseek-LLM-67B-Chat for tighter calls. If your workload also depends on reasoning depth, start with Phi-4 Mini Flash Reasoning; if it depends on provider fit, run the same evaluation with Together AI Deepseek-LLM-67B-Chat.
Continue comparing
Last reviewed: 2026-05-11. Data sourced from public model cards and provider documentation.