Model comparison
Phi-4 Mini vs Step 3.7 Flash
Step 3.7 Flash is the stronger model overall, scoring 37.3 to 30.9 on the Noometry Index. Phi-4 Mini costs 3.2× less per token, which makes it the better buy when Step 3.7 Flash's lead doesn't matter for your workload.
Last verified . 2 shared benchmarks.
Microsoft
StepFunSummary
- They share 2 benchmarks with published results for both. Phi-4 Mini scores higher in 1 category and Step 3.7 Flash in 1 category; one gap is clear of the uncertainty.
- The widest gap is in coding, where Step 3.7 Flash leads 40.0 to 28.1.
- The biggest single-benchmark swing is SciCode: 10.8% for Phi-4 Mini and 40% for Step 3.7 Flash.
- Phi-4 Mini is cheaper at $0.075 / $0.30 per million input/output tokens, against $0.18 / $1.11 for Step 3.7 Flash.
- Step 3.7 Flash accepts more context: 256K tokens versus 128K.
Side by side
| Phi-4 Mini | Step 3.7 Flash | |
|---|---|---|
| Provider | Microsoft | StepFun |
| Noometry Index | 30.9 | 37.3 |
| Released | 2024-12-11 | 2026-05-29 |
| Weights | Open | Open |
| Context window | 128K | 256K |
| Max output | 4K | 256K |
| Input $ / M tokens | $0.075 | $0.18 |
| Output $ / M tokens | $0.30 | $1.11 |
| Results tracked | 3 | 5 |
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Category by category
Coding Step 3.7 Flash leads
Phi-4 Mini: 28.1 (#317), Step 3.7 Flash: 40.0 (#150)
Reasoning Too close to call
Phi-4 Mini: 22.4 (#195), Step 3.7 Flash: 21.6 (#219)
| Benchmark | Phi-4 Mini | Step 3.7 Flash |
|---|---|---|
| CritPt | 0% | 2.3% |
| NYT Connections (extended) | — | 39.7% |
Math Not comparable
Phi-4 Mini: —, Step 3.7 Flash: 42.9 (#82)
| Benchmark | Phi-4 Mini | Step 3.7 Flash |
|---|---|---|
| MathArena Final-Answer Competitions | — | 68.5% |
Knowledge Not comparable
Phi-4 Mini: 25.3 (#262), Step 3.7 Flash: —
| Benchmark | Phi-4 Mini | Step 3.7 Flash |
|---|---|---|
| Vectara Hallucination Rate | 23.5% | — |
Frequently asked questions
Is Phi-4 Mini better than Step 3.7 Flash?
Step 3.7 Flash is the stronger model overall, scoring 37.3 to 30.9 on the Noometry Index. Phi-4 Mini costs 3.2× less per token, which makes it the better buy when Step 3.7 Flash's lead doesn't matter for your workload.
Which is cheaper, Phi-4 Mini or Step 3.7 Flash?
Phi-4 Mini is cheaper. It lists at $0.075 per million input tokens and $0.30 per million output tokens; Step 3.7 Flash lists at $0.18 and $1.11.
Is Phi-4 Mini or Step 3.7 Flash better for coding?
Step 3.7 Flash scores higher on coding benchmarks: 40.0 versus 28.1 in the Noometry coding category.
Which has the bigger context window?
Step 3.7 Flash does, with 256K tokens against 128K.
How many benchmarks do Phi-4 Mini and Step 3.7 Flash share?
2 benchmarks have published results for both models. Phi-4 Mini has 3 scored results on Noometry and Step 3.7 Flash has 5.