Data points: 136
Model compare
The readout for GPT-5.4 and O3, 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 82 to 18.
Evidence depth
136 data points
Includes 33 benchmark rows, 1 audit samples, and 6 provider examples.
Selection signal
Start with GPT-5.4
The charts below split 40 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 O3: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | GPT-5.4 | O3 |
|---|---|---|
| Overall leader | Leading | Contender |
| Weighted overall score | 82.0 pts | 18.0 pts |
| Benchmark category leads | 7 categories | 1 categories |
| Operational advantages | Cheapest input price, Free providers, Provider coverage | Average speed, First-token latency |
| Context window | 1.1M tokens | 200K tokens |
| Max output | 128K tokens | 100K 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 | O3 |
|---|---|---|
| Developer | OpenAI | OpenAI |
| Released | Mar 2026 | Apr 2025 |
| Parameters | No data | No data |
| Tokenizer | GPT | GPT |
| Knowledge cutoff | No data | 2024-06-30 |
| OpenRouter ID | openai/gpt-5.4 | openai/o3 |
| References | No data | No data |
This report only uses LMSpeed data for GPT-5.4 and O3: 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, Multilingual) and operational dimensions (Cheapest input price, Free providers, Provider coverage).
O3
O3 is stronger in benchmark categories (Math) and operational dimensions (Average speed, 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
58.4
Avg. score
O3
53.8
GPT-5.4 leads by 6.8
GPT-5.4 leads by 7.8
GPT-5.4 leads by 4.4
GPT-5.4 leads by 9.0
O3 leads by 1.3
GPT-5.4 leads by 7.7
GPT-5.4 leads by 1.6
GPT-5.4 leads by 1.0
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
GPT-5.4
winner86.0
Rank #3/127 · confidence 4 · eval date 2026-03-05
O3
53.0
Rank #65/127 · confidence 1 · eval date 2025-04-16
GPT-5.4
winner0.67 s
Rank #22/139 · confidence 4
O3
7.27 s
Rank #70/139 · confidence 4
GPT-5.4
winner0.67 s
Rank #30/139 · confidence 4
O3
7.27 s
Rank #114/139 · confidence 4
GPT-5.4
96.3 tok/s
Rank #60/139 · confidence 4
O3
winner117.8 tok/s
Rank #50/139 · confidence 4
GPT-5.4
$15.00/M
Rank #138/163 · confidence 4
O3
winner$8.00/M
Rank #116/163 · confidence 4
GPT-5.4
$5.63/M
Rank #137/163 · confidence 4
O3
winner$3.50/M
Rank #125/163 · confidence 4
GPT-5.4
$2.50/M
Rank #133/163 · confidence 4
O3
winner$2.00/M
Rank #125/163 · confidence 4
GPT-5.4
winner87.5
Rank #3/70 · confidence 4 · eval date 2026-03-05
O3
54.2
Rank #35/70 · confidence 1 · eval date 2025-04-16
GPT-5.4
winner74.0
Rank #5/89 · confidence 4 · eval date 2026-03-05
O3
69.3
Rank #22/89 · confidence 1 · eval date 2025-04-16
GPT-5.4
winner23.4
Rank #7/73 · confidence 4 · eval date 2026-03-05
O3
1.1
Rank #54/73 · confidence 1 · eval date 2025-04-16
GPT-5.4
10.6%
Rank #90/186 · confidence 4
O3
winner20.0%
Rank #55/186 · confidence 4
GPT-5.4
74.8%
Rank #96/187 · confidence 4
O3
winner82.7%
Rank #59/187 · confidence 4
GPT-5.4
winner91.2
Rank #1/100 · confidence 4 · eval date 2026-03-05
O3
57.9
Rank #62/100 · confidence 1 · eval date 2025-04-16
GPT-5.4
winner56.6
Rank #3/96 · confidence 4 · eval date 2026-03-05
O3
41.0
Rank #52/96 · confidence 1 · eval date 2025-04-16
GPT-5.4
winner57.6
Rank #5/85 · confidence 4 · eval date 2026-03-05
O3
37.1
Rank #36/85 · confidence 1 · eval date 2025-04-16
GPT-5.4
winner47.1%
Rank #23/184 · confidence 4
O3
41.0%
Rank #57/184 · confidence 4
GPT-5.4
winner47.6
Rank #7/47 · confidence 4 · eval date 2026-03-05
O3
18.7
Rank #30/47 · confidence 1 · eval date 2025-04-16
GPT-5.4
winner27.1
Rank #8/35 · confidence 4 · eval date 2026-03-05
O3
2.1
Rank #32/35 · confidence 1 · eval date 2025-04-16
GPT-5.4
winner70.3
Rank #16/59 · confidence 4 · eval date 2026-03-05
O3
38.1
Rank #43/59 · confidence 1 · eval date 2025-04-16
GPT-5.4
winner96.8
Rank #1/92 · confidence 4 · eval date 2026-03-05
O3
62.5
Rank #48/92 · confidence 1 · eval date 2025-04-16
GPT-5.4
winner41.6
Rank #7/96 · confidence 4 · eval date 2026-03-05
O3
20.0
Rank #52/96 · confidence 1 · eval date 2025-04-16
GPT-5.4
winner51.4
Rank #9/99 · confidence 4 · eval date 2026-03-05
O3
30.4
Rank #57/99 · confidence 1 · eval date 2025-04-16
GPT-5.4
winner92.0
Rank #10/96 · confidence 4 · eval date 2026-03-05
O3
82.7
Rank #54/96 · confidence 1 · eval date 2025-04-16
GPT-5.4
winner50.0
Rank #10/90 · confidence 4 · eval date 2026-03-05
O3
38.4
Rank #27/90 · confidence 1 · eval date 2025-04-16
GPT-5.4
winner88.6
Rank #19/90 · confidence 4 · eval date 2026-03-05
O3
87.1
Rank #22/90 · confidence 1 · eval date 2025-04-16
GPT-5.4
winner100.0
Rank #1/62 · confidence 4 · eval date 2026-03-05
O3
64.4
Rank #28/62 · confidence 1 · eval date 2025-04-16
GPT-5.4
winner78.4
Rank #15/57 · confidence 4 · eval date 2026-03-05
O3
70.1
Rank #41/57 · confidence 1 · eval date 2025-04-16
GPT-5.4
winner1254.0
Rank #30/65 · confidence 4 · eval date 2026-03-05
O3
1071.0
Rank #58/65 · confidence 1 · eval date 2025-04-16
GPT-5.4
60.0
Rank #49/81 · confidence 4 · eval date 2026-03-05
O3
winner61.7
Rank #47/81 · confidence 1 · eval date 2025-04-16
GPT-5.4
winner92.6
Rank #2/75 · confidence 4 · eval date 2026-03-05
O3
67.3
Rank #42/75 · confidence 1 · eval date 2025-04-16
GPT-5.4
winner73.9
Rank #24/86 · confidence 4 · eval date 2026-03-05
O3
71.4
Rank #34/86 · confidence 1 · eval date 2025-04-16
GPT-5.4
winner87.5
Rank #8/95 · confidence 4 · eval date 2026-03-05
O3
59.9
Rank #40/95 · confidence 1 · eval date 2025-04-16
GPT-5.4
winner87.1
Rank #37/84 · confidence 4 · eval date 2026-03-05
O3
80.7
Rank #53/84 · confidence 1 · eval date 2025-04-16
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-5.4 | O3 |
|---|---|---|
Winner: GPT-5.4 | GPT-5.4 gpt-5.4 Audit score 93 1008486100 | O3 o3-2025-04-16 No audit yet |
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | GPT-5.4 | O3 |
|---|---|---|
20 tests | GPT-5.4 speed / latency 51 tok/s / 4032ms input / output No data | O3 speed / latency N/A / N/A input / output No data |
10 tests | GPT-5.4 speed / latency 55 tok/s / 2903ms input / output No data | O3 speed / latency N/A / N/A input / output No data |
10 tests | GPT-5.4 speed / latency 54 tok/s / 1369ms input / output No data | O3 speed / latency N/A / N/A input / output No data |
10 tests | GPT-5.4 speed / latency 51 tok/s / 1093ms input / output No data | O3 speed / latency N/A / N/A input / output No data |
10 tests | GPT-5.4 speed / latency 37 tok/s / 1721ms input / output No data | O3 speed / latency N/A / N/A input / output No data |
GPT-5.4 gpt-5.4 speed / latency No data input / output $0/request | O3 o3 speed / latency No data input / output $5.88/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 modeReasoning | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
