Model comparison
GPT-5.3 Chat vs Phi-4 Mini
GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 30.9 on the Noometry Index. Phi-4 Mini costs 37× less per token, which makes it the better buy when GPT-5.3 Chat's lead doesn't matter for your workload.
Last verified . 0 shared benchmarks.
MicrosoftSummary
- The widest gap is in knowledge, where GPT-5.3 Chat leads 38.8 to 25.3.
- Phi-4 Mini is cheaper at $0.075 / $0.30 per million input/output tokens, against $1.75 / $14 for GPT-5.3 Chat.
- Phi-4 Mini has downloadable open weights; the other is API-only.
Side by side
| GPT-5.3 Chat | Phi-4 Mini | |
|---|---|---|
| Provider | OpenAI | Microsoft |
| Noometry Index | 42.8 | 30.9 |
| Released | 2026-03-03 | 2024-12-11 |
| Weights | Proprietary | Open |
| Context window | 128K | 128K |
| Max output | 16K | 4K |
| Input $ / M tokens | $1.75 | $0.075 |
| Output $ / M tokens | $14 | $0.30 |
| Results tracked | 18 | 3 |
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Category by category
Coding GPT-5.3 Chat leads
GPT-5.3 Chat: 41.4 (#124), Phi-4 Mini: 28.1 (#317)
| Benchmark | GPT-5.3 Chat | Phi-4 Mini |
|---|---|---|
| SciCode | — | 10.8% |
| LMArena Coding | 1408 | — |
Reasoning GPT-5.3 Chat leads
GPT-5.3 Chat: 28.5 (#102), Phi-4 Mini: 22.4 (#195)
| Benchmark | GPT-5.3 Chat | Phi-4 Mini |
|---|---|---|
| CritPt | — | 0% |
| LMArena Hard Prompts | 1399 | — |
Math Not comparable
GPT-5.3 Chat: 38.2 (#142), Phi-4 Mini: —
| Benchmark | GPT-5.3 Chat | Phi-4 Mini |
|---|---|---|
| LMArena Math | 1389 | — |
Knowledge GPT-5.3 Chat leads
GPT-5.3 Chat: 38.8 (#140), Phi-4 Mini: 25.3 (#262)
| Benchmark | GPT-5.3 Chat | Phi-4 Mini |
|---|---|---|
| Vectara Hallucination Rate | — | 23.5% |
| LMArena Expert | 1397 | — |
Multilingual Not comparable
GPT-5.3 Chat: 50.3 (#124), Phi-4 Mini: —
| Benchmark | GPT-5.3 Chat | Phi-4 Mini |
|---|---|---|
| LMArena Non-English | 1382 | — |
| LMArena Chinese | 1432 | — |
| LMArena French | 1397 | — |
| LMArena German | 1384 | — |
| LMArena Japanese | 1352 | — |
| LMArena Korean | 1346 | — |
| LMArena Russian | 1400 | — |
| LMArena Spanish | 1371 | — |
Instruction Following Not comparable
GPT-5.3 Chat: 72.8 (#129), Phi-4 Mini: —
| Benchmark | GPT-5.3 Chat | Phi-4 Mini |
|---|---|---|
| LMArena Instruction Following | 1378 | — |
Long Context Not comparable
GPT-5.3 Chat: 42.6 (#120), Phi-4 Mini: —
| Benchmark | GPT-5.3 Chat | Phi-4 Mini |
|---|---|---|
| LMArena Longer Query | 1396 | — |
Writing & Preference Not comparable
GPT-5.3 Chat: 63.1 (#68), Phi-4 Mini: —
| Benchmark | GPT-5.3 Chat | Phi-4 Mini |
|---|---|---|
| LMArena Text | 1389 | — |
| LMArena Creative Writing | 1355 | — |
| EQ-Bench Creative Writing | 1690 | — |
| LMArena Multi-Turn | 1412 | — |
Frequently asked questions
Is GPT-5.3 Chat better than Phi-4 Mini?
GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 30.9 on the Noometry Index. Phi-4 Mini costs 37× less per token, which makes it the better buy when GPT-5.3 Chat's lead doesn't matter for your workload.
Which is cheaper, GPT-5.3 Chat or Phi-4 Mini?
Phi-4 Mini is cheaper. It lists at $0.075 per million input tokens and $0.30 per million output tokens; GPT-5.3 Chat lists at $1.75 and $14.
Is GPT-5.3 Chat or Phi-4 Mini better for coding?
GPT-5.3 Chat scores higher on coding benchmarks: 41.4 versus 28.1 in the Noometry coding category.
Which has the bigger context window?
Both accept 128K tokens.
How many benchmarks do GPT-5.3 Chat and Phi-4 Mini share?
0 benchmarks have published results for both models. GPT-5.3 Chat has 18 scored results on Noometry and Phi-4 Mini has 3.