Data points: 100
Model compare
The readout for GPT-4 Turbo 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 28 to 72.
Evidence depth
100 data points
Includes 12 benchmark rows, 2 audit samples, and 6 provider examples.
Selection signal
Start with GPT-5.4 Mini
The charts below split 20 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-4 Turbo and GPT-5.4 Mini: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | GPT-4 Turbo | GPT-5.4 Mini |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 28.0 pts | 72.0 pts |
| Benchmark category leads | 1 categories | 3 categories |
| Operational advantages | First-token latency, Free providers | Cheapest input price, Average speed, Provider coverage |
| Context window | 128K tokens | 400K tokens |
| Max output | 4.1K tokens | 128K tokens |
| Modalities | Input TextImage 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-4 Turbo | GPT-5.4 Mini |
|---|---|---|
| Developer | OpenAI | OpenAI |
| Released | Apr 2024 | Mar 2026 |
| Parameters | No data | No data |
| Tokenizer | GPT | GPT |
| Knowledge cutoff | 2023-12-31 | 2025-08-31 |
| OpenRouter ID | openai/gpt-4-turbo | openai/gpt-5.4-mini |
| References | No data | No data |
This report only uses LMSpeed data for GPT-4 Turbo and GPT-5.4 Mini: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
GPT-4 Turbo
GPT-4 Turbo 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 (Coding, Reasoning, Math) 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-4 Turbo
47
Avg. score
GPT-5.4 Mini
52
GPT-5.4 Mini
GPT-5.4 Mini leads by 13.8
GPT-5.4 Mini leads by 13.0
GPT-4 Turbo leads by 6.7
GPT-5.4 Mini leads by 4.0
No data
GPT-5.4 Mini
GPT-5.4 Mini
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
GPT-4 Turbo
39.4 tok/s
Rank #130/136 · confidence 4
GPT-5.4 Mini
winner203.4 tok/s
Rank #23/136 · confidence 4
GPT-4 Turbo
winner1.25 s
Rank #48/136 · confidence 4
GPT-5.4 Mini
9.70 s
Rank #71/136 · confidence 4
GPT-4 Turbo
winner1.25 s
Rank #81/136 · confidence 4
GPT-5.4 Mini
9.70 s
Rank #113/136 · confidence 4
GPT-4 Turbo
$10.00/M
Rank #153/162 · confidence 4
GPT-5.4 Mini
winner$0.750/M
Rank #95/162 · confidence 4
GPT-4 Turbo
$15.00/M
Rank #153/162 · confidence 4
GPT-5.4 Mini
winner$1.69/M
Rank #96/162 · confidence 4
GPT-4 Turbo
$30.00/M
Rank #151/162 · confidence 4
GPT-5.4 Mini
winner$4.50/M
Rank #103/162 · confidence 4
GPT-4 Turbo
3.3%
Rank #179/186 · confidence 4
GPT-5.4 Mini
winner17.1%
Rank #64/186 · confidence 4
GPT-4 Turbo
21.5
Rank #50/58 · confidence 1 · eval date 2023-11-06
GPT-5.4 Mini
winner56.1
Rank #23/58 · confidence 3 · eval date 2026-03-17
GPT-4 Turbo
31.9
Rank #84/96 · confidence 1 · eval date 2023-11-06
GPT-5.4 Mini
winner49.9
Rank #23/96 · confidence 3 · eval date 2026-03-17
GPT-4 Turbo
31.9%
Rank #127/184 · confidence 4
GPT-5.4 Mini
winner44.2%
Rank #37/184 · confidence 4
GPT-4 Turbo
7.9
Rank #96/99 · confidence 1 · eval date 2023-11-06
GPT-5.4 Mini
winner40.0
Rank #30/99 · confidence 3 · eval date 2026-03-17
GPT-4 Turbo
3.3
Rank #94/96 · confidence 1 · eval date 2023-11-06
GPT-5.4 Mini
winner26.6
Rank #38/96 · 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-4 Turbo | GPT-5.4 Mini |
|---|---|---|
Winner: GPT-5.4 Mini | GPT-4 Turbo gpt-4-turbo-2024-04-09 No audit yet | GPT-5.4 Mini gpt-5.4-mini Audit score 97 10010086100 |
Winner: GPT-5.4 Mini | GPT-4 Turbo gpt-4-turbo-preview 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-4 Turbo | GPT-5.4 Mini |
|---|---|---|
5 tests | GPT-4 Turbo 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-4 Turbo speed / latency N/A / N/A input / output No data | GPT-5.4 Mini speed / latency 195 tok/s / 1104ms input / output No data |
5 tests | GPT-4 Turbo speed / latency N/A / N/A input / output No data | GPT-5.4 Mini speed / latency 201 tok/s / 1441ms input / output No data |
5 tests | GPT-4 Turbo speed / latency 73 tok/s / 1218ms input / output No data | GPT-5.4 Mini speed / latency N/A / N/A input / output No data |
0 tests | GPT-4 Turbo speed / latency N/A / N/A input / output No data | GPT-5.4 Mini speed / latency N/A / N/A input / output No data |
GPT-4 Turbo gpt-4-turbo 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 inputText outputTool callingStructured outputsJSON mode | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
