Data points: 106
Model compare
The readout for GPT-4o and GPT-5.4, 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 12 to 88.
Evidence depth
106 data points
Includes 18 benchmark rows, 1 audit samples, and 7 provider examples.
Selection signal
Start with GPT-5.4
The charts below split 26 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: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | GPT-4o | GPT-5.4 |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 12.0 pts | 88.0 pts |
| Benchmark category leads | 0 categories | 6 categories |
| Operational advantages | Average speed, First-token latency, Free providers | Cheapest input price, Provider coverage |
| Context window | 128K tokens | 1.1M 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 |
|---|---|---|
| Developer | OpenAI | OpenAI |
| Released | Nov 2024 | Mar 2026 |
| Parameters | No data | No data |
| Tokenizer | GPT | GPT |
| Knowledge cutoff | 2023-10-31 | No data |
| OpenRouter ID | openai/gpt-4o | openai/gpt-5.4 |
| References | No data | No data |
This report only uses LMSpeed data for GPT-4o and GPT-5.4: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
GPT-4o
GPT-4o has these operational advantages: Average speed, First-token latency, Free providers.
GPT-5.4
GPT-5.4 is stronger in benchmark categories (Agents, Coding, Reasoning, Knowledge, Math) and operational dimensions (Cheapest input price, 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
43.2
Avg. score
GPT-5.4
57.4
GPT-5.4 leads by 17.4
GPT-5.4 leads by 16.7
GPT-5.4 leads by 16.2
GPT-5.4 leads by 10.2
GPT-5.4 leads by 15.4
No data
GPT-5.4
GPT-5.4 leads by 12.8
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
GPT-4o
43.0
Rank #76/84 · confidence 1 · eval date 2024-05-13
GPT-5.4
winner67.0
Rank #19/84 · confidence 3 · eval date 2026-03-05
GPT-4o
winner$10.00/M
Rank #120/162 · confidence 4
GPT-5.4
$15.00/M
Rank #136/162 · confidence 4
GPT-4o
winner$4.38/M
Rank #127/162 · confidence 4
GPT-5.4
$5.63/M
Rank #135/162 · confidence 4
GPT-4o
$2.50/M
Rank #131/162 · confidence 4
GPT-5.4
$2.50/M
Rank #131/162 · confidence 4
GPT-4o
3.3%
Rank #180/187 · confidence 4
GPT-5.4
winner10.6%
Rank #91/187 · confidence 4
GPT-4o
54.3%
Rank #156/188 · confidence 4
GPT-5.4
winner74.8%
Rank #96/188 · confidence 4
GPT-4o
33.3
Rank #80/96 · confidence 1 · eval date 2024-05-13
GPT-5.4
winner56.6
Rank #4/96 · confidence 3 · eval date 2026-03-05
GPT-4o
33.3%
Rank #120/185 · confidence 4
GPT-5.4
winner47.1%
Rank #24/185 · confidence 4
GPT-4o
0.3
Rank #47/47 · confidence 1 · eval date 2024-05-13
GPT-5.4
winner47.6
Rank #7/47 · confidence 3 · eval date 2026-03-05
GPT-4o
25.4
Rank #54/56 · confidence 1 · eval date 2024-05-13
GPT-5.4
winner65.9
Rank #17/56 · confidence 3 · eval date 2026-03-05
GPT-4o
3.3
Rank #94/96 · confidence 1 · eval date 2024-05-13
GPT-5.4
winner41.6
Rank #8/96 · confidence 3 · eval date 2026-03-05
GPT-4o
19.7
Rank #75/90 · confidence 1 · eval date 2024-05-13
GPT-5.4
winner50.0
Rank #9/90 · confidence 3 · eval date 2026-03-05
GPT-4o
11.2
Rank #90/99 · confidence 1 · eval date 2024-05-13
GPT-5.4
winner51.4
Rank #10/99 · confidence 3 · eval date 2026-03-05
GPT-4o
54.3
Rank #91/96 · confidence 1 · eval date 2024-05-13
GPT-5.4
winner92.0
Rank #11/96 · confidence 3 · eval date 2026-03-05
GPT-4o
37.9
Rank #75/90 · confidence 1 · eval date 2024-05-13
GPT-5.4
winner88.6
Rank #18/90 · confidence 3 · eval date 2026-03-05
GPT-4o
861.0
Rank #65/66 · confidence 1 · eval date 2024-05-13
GPT-5.4
winner1250.0
Rank #31/66 · confidence 3 · eval date 2026-03-05
GPT-4o
34.3
Rank #82/86 · confidence 1 · eval date 2024-05-13
GPT-5.4
winner73.9
Rank #24/86 · confidence 3 · eval date 2026-03-05
GPT-4o
25.1
Rank #75/84 · confidence 1 · eval date 2024-05-13
GPT-5.4
winner87.1
Rank #37/84 · confidence 3 · eval date 2026-03-05
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-4o | GPT-5.4 |
|---|---|---|
Winner: GPT-5.4 | GPT-4o gpt-4o-2024-11-20 No audit yet | GPT-5.4 gpt-5.4 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 |
|---|---|---|
25 tests | GPT-4o speed / latency 88 tok/s / 1593ms input / output No data | GPT-5.4 speed / latency 50 tok/s / 1423ms input / output No data |
20 tests | GPT-4o speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 51 tok/s / 4032ms input / output No data |
20 tests | GPT-4o speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 34 tok/s / 1748ms input / output No data |
10 tests | GPT-4o speed / latency 57 tok/s / 3381ms input / output No data | GPT-5.4 speed / latency N/A / N/A input / output No data |
10 tests | GPT-4o speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 88 tok/s / 6075ms input / output No data |
GPT-4o gpt-4o speed / latency No data input / output $0/M/$0/M | GPT-5.4 gpt-5.4 speed / latency No data input / output $0.240/M | |
GPT-4o gpt-4o-2024-08-06 speed / latency No data input / output $0/request | GPT-5.4 gpt-5.4 speed / latency No data input / output $0/request |
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 modeWeb search | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
