Phi 3 small 8k instruct vs Phi 4 reasoning vision 15B
Phi 3 small 8k instruct (Microsoft) and Phi 4 reasoning vision 15B (Microsoft) compared on the ModelCap Index, API price, context window, provider availability, weight access and every public benchmark board they share. Figures are the same ones shown on the live rankings; nothing here is a hidden score.
Snapshot as of 23 September 2026
As of 23 September 2026, Phi 4 reasoning vision 15B holds the stronger ModelCap Index position (#217 vs #254).
Evidence: 2 public benchmark observations across 2 boards · finetune of microsoft/Phi-4-reasoning · finetune (100%). Prices are the lowest listed API offer per million tokens observed on the OpenRouter catalogue.
Benchmark scores: Phi 3 small 8k instruct vs Phi 4 reasoning vision 15B
Public benchmark boards where Phi 3 small 8k instruct or Phi 4 reasoning vision 15B has a published result
Phi 3 small 8k instruct vs Phi 4 reasoning vision 15B: common questions
Is Phi 3 small 8k instruct better than Phi 4 reasoning vision 15B?
Phi 4 reasoning vision 15B ranks higher on the ModelCap Index as of 23 September 2026: #217 against #254. That is a capability ranking built from public benchmark evidence with published uncertainty; whether it is "better" for you also depends on price, context and where you can run it. Their published uncertainty intervals overlap, so the rank difference alone does not establish a reliable capability advantage for your workload.
Is Phi 3 small 8k instruct cheaper than Phi 4 reasoning vision 15B?
At least one of the two has no listed API price on ModelCap right now, so no price comparison is made.
Which has the bigger context window, Phi 3 small 8k instruct or Phi 4 reasoning vision 15B?
Both publish a —-token context window.
Which is better for coding, Phi 3 small 8k instruct or Phi 4 reasoning vision 15B?
The two models do not share a coding benchmark board on ModelCap yet, so no head-to-head coding score is published; the ModelCap Index position is the closest overall signal.
Are Phi 3 small 8k instruct and Phi 4 reasoning vision 15B open-weight models?
Phi 3 small 8k instruct: Open weights. Phi 4 reasoning vision 15B: Open weights. Open weights mean the checkpoint can be downloaded and self-hosted under its licence; API-only models are available solely through hosted endpoints.
Where can I run Phi 3 small 8k instruct and Phi 4 reasoning vision 15B?
ModelCap currently lists 0 API providers for Phi 3 small 8k instruct and 0 for Phi 4 reasoning vision 15B, from the OpenRouter catalogue snapshot the site serves; each model page lists the providers and their prices.
How current is this Phi 3 small 8k instruct vs Phi 4 reasoning vision 15B comparison?
Every figure comes from the sealed ModelCap dataset published 23 September 2026; the page re-renders within a minute of each data refresh, and the ModelCap Index positions are the same ones shown on the live rankings.