Data points: 116
Model compare
The readout for GPT-4o and GPT-5.4 Mini, before the detailed comparison sheet.
Weighted outcome: GPT-5.4 Mini. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
GPT-5.4 Mini
GPT-5.4 Mini has the higher weighted result; Model A / B score 21.3 to 78.7.
Evidence depth
116 data points
Includes 20 benchmark rows, 2 audit samples, and 7 provider examples.
Selection signal
Start with GPT-5.4 Mini
The charts below split 29 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-4o and GPT-5.4 Mini: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | GPT-4o | GPT-5.4 Mini |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 21.3 pts | 78.7 pts |
| Benchmark category leads | 1 categories | 5 categories |
| Operational advantages | First-token latency, Free providers | Cheapest input price, Average speed, Provider coverage |
| Context window | 128K tokens | 400K tokens |
| Max output | 16.4K tokens | 128K 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-4o | GPT-5.4 Mini |
|---|---|---|
| Developer | OpenAI | OpenAI |
| Released | Nov 2024 | Mar 2026 |
| Parameters | No data | No data |
| Tokenizer | GPT | GPT |
| Knowledge cutoff | 2023-10-31 | 2025-08-31 |
| OpenRouter ID | openai/gpt-4o | openai/gpt-5.4-mini |
| References | No data | No data |
This report only uses LMSpeed data for GPT-4o and GPT-5.4 Mini: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
GPT-4o
GPT-4o is stronger in benchmark categories (Knowledge) and operational dimensions (First-token latency, Free providers).
GPT-5.4 Mini
GPT-5.4 Mini is stronger in benchmark categories (Agents, Coding, Reasoning, Math, Instruction following) and operational dimensions (Cheapest input price, Average speed, Provider coverage).
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-4o
43.3
Avg. score
GPT-5.4 Mini
52
GPT-5.4 Mini leads by 12.4
GPT-5.4 Mini leads by 11.2
GPT-5.4 Mini leads by 16.1
GPT-4o leads by 1.9
GPT-5.4 Mini leads by 7.6
No data
GPT-5.4 Mini
GPT-5.4 Mini leads by 12.6
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
GPT-4o
44.0
Rank #72/83 · confidence 1 · eval date 2024-05-13
GPT-5.4 Mini
winner59.0
Rank #35/83 · confidence 3 · eval date 2026-03-17
GPT-4o
winner0.53 s
Rank #10/136 · confidence 4
GPT-5.4 Mini
9.70 s
Rank #71/136 · confidence 4
GPT-4o
winner0.53 s
Rank #16/136 · confidence 4
GPT-5.4 Mini
9.70 s
Rank #113/136 · confidence 4
GPT-4o
winner207.2 tok/s
Rank #22/136 · confidence 4
GPT-5.4 Mini
203.4 tok/s
Rank #23/136 · confidence 4
GPT-4o
$2.50/M
Rank #132/162 · confidence 4
GPT-5.4 Mini
winner$0.750/M
Rank #95/162 · confidence 4
GPT-4o
$4.38/M
Rank #128/162 · confidence 4
GPT-5.4 Mini
winner$1.69/M
Rank #96/162 · confidence 4
GPT-4o
$10.00/M
Rank #121/162 · confidence 4
GPT-5.4 Mini
winner$4.50/M
Rank #103/162 · confidence 4
GPT-4o
54.3%
Rank #155/187 · confidence 4
GPT-5.4 Mini
winner82.3%
Rank #63/187 · confidence 4
GPT-4o
3.3%
Rank #179/186 · confidence 4
GPT-5.4 Mini
winner17.1%
Rank #64/186 · confidence 4
GPT-4o
33.3
Rank #80/96 · confidence 1 · eval date 2024-05-13
GPT-5.4 Mini
winner49.9
Rank #23/96 · confidence 3 · eval date 2026-03-17
GPT-4o
33.3%
Rank #119/184 · confidence 4
GPT-5.4 Mini
winner44.2%
Rank #37/184 · confidence 4
GPT-4o
0.3
Rank #47/47 · confidence 1 · eval date 2024-05-13
GPT-5.4 Mini
winner28.3
Rank #20/47 · confidence 3 · eval date 2026-03-17
GPT-4o
25.4
Rank #54/56 · confidence 1 · eval date 2024-05-13
GPT-5.4 Mini
winner44.7
Rank #32/56 · confidence 3 · eval date 2026-03-17
GPT-4o
37.9
Rank #75/90 · confidence 1 · eval date 2024-05-13
GPT-5.4 Mini
winner89.8
Rank #14/90 · confidence 3 · eval date 2026-03-17
GPT-4o
11.2
Rank #90/99 · confidence 1 · eval date 2024-05-13
GPT-5.4 Mini
winner40.0
Rank #30/99 · confidence 3 · eval date 2026-03-17
GPT-4o
19.7
Rank #75/90 · confidence 1 · eval date 2024-05-13
GPT-5.4 Mini
winner37.5
Rank #32/90 · confidence 3 · eval date 2026-03-17
GPT-4o
54.3
Rank #91/96 · confidence 1 · eval date 2024-05-13
GPT-5.4 Mini
winner87.5
Rank #34/96 · confidence 3 · eval date 2026-03-17
GPT-4o
3.3
Rank #94/96 · confidence 1 · eval date 2024-05-13
GPT-5.4 Mini
winner26.6
Rank #38/96 · confidence 3 · eval date 2026-03-17
GPT-4o
34.3
Rank #82/86 · confidence 1 · eval date 2024-05-13
GPT-5.4 Mini
winner73.3
Rank #26/86 · confidence 3 · eval date 2026-03-17
GPT-4o
25.1
Rank #75/84 · confidence 1 · eval date 2024-05-13
GPT-5.4 Mini
winner83.3
Rank #49/84 · confidence 3 · eval date 2026-03-17
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-4o | GPT-5.4 Mini |
|---|---|---|
Winner: GPT-5.4 Mini | GPT-4o gpt-4o No audit yet | GPT-5.4 Mini gpt-5.4-mini Audit score 97 10010086100 |
Winner: GPT-5.4 Mini | GPT-4o gpt-4o-2024-11-20 No audit yet | GPT-5.4 Mini gpt-5.4-mini Audit score 93 1008486100 |
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | GPT-4o | GPT-5.4 Mini |
|---|---|---|
20 tests | GPT-4o speed / latency 88 tok/s / 1593ms input / output No data | GPT-5.4 Mini speed / latency N/A / N/A input / output No data |
10 tests | GPT-4o speed / latency 58 tok/s / 2583ms input / output No data | GPT-5.4 Mini speed / latency 201 tok/s / 1441ms input / output No data |
5 tests | GPT-4o speed / latency 48 tok/s / 13138ms input / output No data | GPT-5.4 Mini speed / latency N/A / N/A input / output No data |
5 tests | GPT-4o speed / latency N/A / N/A input / output No data | GPT-5.4 Mini speed / latency 98 tok/s / 4039ms input / output No data |
5 tests | GPT-4o speed / latency N/A / N/A input / output No data | GPT-5.4 Mini speed / latency 195 tok/s / 1104ms input / output No data |
GPT-4o gpt-4o-2024-11-20 speed / latency No data input / output $0/M/$0/M | GPT-5.4 Mini gpt-5.4-mini speed / latency No data input / output $0.062/M | |
GPT-4o gpt-4o-2024-05-13 speed / latency No data input / output $0/request | GPT-5.4 Mini gpt-5.4-mini speed / latency No data input / output $0/request |
Weighted outcome: GPT-5.4 Mini. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Input
Output
| Features | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeWeb search | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
