Phi-4
Phi-4 is Microsoft Research’s small language model line focused on strong reasoning per parameter for on-device and low-cost cloud scenarios.
Provider
Microsoft
Model family
Microsoft Phi
Small LLM
Cost tier
Phi
Status
Current
Why teams choose it
Complex reasoning
Useful for workflows that require structured thinking, multi-step logic, and deeper analysis than lightweight models provide.
Long-context analysis
Helps teams summarize, compare, and extract insights from long documents without losing important nuance.
Microsoft roadmap vigilance
Use published model pages—not stale marketing blurbs—for modalities, quotas, pricing, and policy; schedule revalidation tied to vendor release notes.
Cost-efficient routing
Useful as part of a routing stack where cheap models handle drafts and confirmations and this tier handles genuinely hard passages.
Tradeoffs to know
- Not a full replacement for GPT-4-class on hardest tasks.
- Model packaging varies—watch quantization effects.
When not to use this
- Not ideal for simple tasks where cheaper models in the same lineup are good enough.
- Avoid for regulated or high-stakes outputs without evaluations that mimic your tooling, data, and review process.
- Pair catalog notes with comparisons and your own benchmarks before declaring a routing winner.
Technical specs
- Inputs
- text
- Outputs
- text
- Capabilities
- reasoning, coding, edge
- License
- See vendor
- Model string
phi-4
Benchmarks
No benchmark data yet.
Microsoft Phi family lineup
Previous versions
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