Data points: 98
Model compare
The readout for GPT-5.4 and Phi 4, before the detailed comparison sheet.
Weighted outcome: GPT-5.4. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
GPT-5.4
GPT-5.4 has the higher weighted result; Model A / B score 96 to 4.
Evidence depth
98 data points
Includes 16 benchmark rows, 0 audit samples, and 6 provider examples.
Selection signal
Start with GPT-5.4
The charts below split 22 high-signal samples across speed, scores, and audit health.
Switch either side of this report to compare another model with the same LMSpeed data pipeline.
Select a different model to open a new comparison URL.
This report only uses LMSpeed data for GPT-5.4 and Phi 4: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | GPT-5.4 | Phi 4 |
|---|---|---|
| Overall leader | Leading | Contender |
| Weighted overall score | 96.0 pts | 4.0 pts |
| Benchmark category leads | 6 categories | 0 categories |
| Operational advantages | Cheapest input price, Average speed, Free providers, Provider coverage | First-token latency |
| Context window | 1.1M tokens | 16.4K tokens |
| Max output | 128K tokens | 16.4K tokens |
| Modalities | Input TextImageFile Output Text |
The overall result weights benchmark capability categories at 80% and price, API speed/latency, and availability at 20%. Recent test volume does not affect the winner, and missing benchmark categories are excluded.
| Model compare | GPT-5.4 | Phi 4 |
|---|---|---|
| Developer | OpenAI | Microsoft |
| Released | Mar 2026 | Jan 2025 |
| Parameters | No data | No data |
| Tokenizer | GPT | Other |
| Knowledge cutoff | No data | 2024-06-30 |
| OpenRouter ID | openai/gpt-5.4 | microsoft/phi-4 |
| References | No data | No data |
This report only uses LMSpeed data for GPT-5.4 and Phi 4: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
GPT-5.4
GPT-5.4 is stronger in benchmark categories (Agents, Coding, Reasoning, Knowledge, Math) and operational dimensions (Cheapest input price, Average speed, Free providers, Provider coverage).
Phi 4
Phi 4 has these operational advantages: First-token latency.
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
Compare benchmark category scores on a 0-100 scale. Select a category to inspect the gap.
Avg. score
GPT-5.4
57.8
Avg. score
Phi 4
38.4
GPT-5.4 leads by 27.6
GPT-5.4 leads by 23.1
GPT-5.4 leads by 20.0
GPT-5.4 leads by 21.9
GPT-5.4 leads by 10.8
No data
GPT-5.4
GPT-5.4 leads by 16.8
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
GPT-5.4
winner0.67 s
Rank #22/139 · confidence 4
Phi 4
2.14 s
Rank #57/139 · confidence 4
GPT-5.4
winner0.67 s
Rank #30/139 · confidence 4
Phi 4
2.14 s
Rank #102/139 · confidence 4
GPT-5.4
winner96.3 tok/s
Rank #60/139 · confidence 4
Phi 4
28.9 tok/s
Rank #135/139 · confidence 4
GPT-5.4
$2.50/M
Rank #133/163 · confidence 4
Phi 4
winner$0.125/M
Rank #17/163 · confidence 4
GPT-5.4
$5.63/M
Rank #137/163 · confidence 4
Phi 4
winner$0.219/M
Rank #19/163 · confidence 4
GPT-5.4
$15.00/M
Rank #138/163 · confidence 4
Phi 4
winner$0.500/M
Rank #21/163 · confidence 4
GPT-5.4
winner10.6%
Rank #90/186 · confidence 4
Phi 4
4.1%
Rank #156/186 · confidence 4
GPT-5.4
winner74.8%
Rank #96/187 · confidence 4
Phi 4
57.5%
Rank #150/187 · confidence 4
GPT-5.4
winner56.6
Rank #3/96 · confidence 3 · eval date 2026-03-05
Phi 4
26.0
Rank #90/96 · confidence 1 · eval date 2025-01-01
GPT-5.4
winner47.1%
Rank #23/184 · confidence 4
Phi 4
26.0%
Rank #154/184 · confidence 4
GPT-5.4
winner41.6
Rank #7/96 · confidence 3 · eval date 2026-03-05
Phi 4
4.1
Rank #87/96 · confidence 1 · eval date 2025-01-01
GPT-5.4
winner51.4
Rank #9/99 · confidence 3 · eval date 2026-03-05
Phi 4
4.9
Rank #98/99 · confidence 1 · eval date 2025-01-01
GPT-5.4
winner92.0
Rank #10/96 · confidence 3 · eval date 2026-03-05
Phi 4
57.5
Rank #89/96 · confidence 1 · eval date 2025-01-01
GPT-5.4
winner50.0
Rank #10/90 · confidence 3 · eval date 2026-03-05
Phi 4
13.2
Rank #89/90 · confidence 1 · eval date 2025-01-01
GPT-5.4
winner88.6
Rank #19/90 · confidence 3 · eval date 2026-03-05
Phi 4
80.5
Rank #36/90 · confidence 1 · eval date 2025-01-01
GPT-5.4
winner73.9
Rank #24/86 · confidence 3 · eval date 2026-03-05
Phi 4
23.5
Rank #85/86 · confidence 1 · eval date 2025-01-01
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-5.4 | Phi 4 |
|---|---|---|
| No completed audits are available from shared providers yet. | ||
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | GPT-5.4 | Phi 4 |
|---|---|---|
10 tests | GPT-5.4 speed / latency N/A / N/A input / output No data | Phi 4 speed / latency 43 tok/s / 1320ms input / output No data |
5 tests | GPT-5.4 speed / latency 46 tok/s / 3291ms input / output No data | Phi 4 speed / latency N/A / N/A input / output No data |
5 tests | GPT-5.4 speed / latency 51 tok/s / 6045ms input / output No data | Phi 4 speed / latency N/A / N/A input / output No data |
0 tests | GPT-5.4 speed / latency N/A / N/A input / output No data | Phi 4 speed / latency N/A / N/A input / output No data |
0 tests | GPT-5.4 speed / latency N/A / N/A input / output No data | Phi 4 speed / latency N/A / N/A input / output No data |
GPT-5.4 gpt-5.4 speed / latency No data input / output $0.022/request | Phi 4 phi-4 speed / latency No data input / output $57.53/M |
Weighted outcome: GPT-5.4. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Input
Output
| Features | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning | Text inputText outputStructured outputsJSON mode |
|---|
