Data points: 90
Model compare
The readout for GPT-3.5 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 12 to 88.
Evidence depth
90 data points
Includes 7 benchmark rows, 2 audit samples, and 6 provider examples.
Selection signal
Start with GPT-5.4 Mini
The charts below split 15 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-3.5 Turbo and GPT-5.4 Mini: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | GPT-3.5 Turbo | GPT-5.4 Mini |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 12.0 pts | 88.0 pts |
| Benchmark category leads | 0 categories | 3 categories |
| Operational advantages | Cheapest input price, First-token latency, Free providers | Average speed, Provider coverage |
| Context window | 16.4K tokens | 400K tokens |
| Max output | 4.1K tokens | 128K tokens |
| Modalities | Input Text Output Text | Input File |
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-3.5 Turbo | GPT-5.4 Mini |
|---|---|---|
| Developer | OpenAI | OpenAI |
| Released | Jan 2024 | Mar 2026 |
| Parameters | No data | No data |
| Tokenizer | GPT | GPT |
| Knowledge cutoff | 2021-09-30 | 2025-08-31 |
| OpenRouter ID | openai/gpt-3.5-turbo | openai/gpt-5.4-mini |
| References | No data | No data |
This report only uses LMSpeed data for GPT-3.5 Turbo and GPT-5.4 Mini: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
GPT-3.5 Turbo
GPT-3.5 Turbo has these operational advantages: Cheapest input price, First-token latency, Free providers.
GPT-5.4 Mini
GPT-5.4 Mini is stronger in benchmark categories (Coding, Reasoning, Math) and operational dimensions (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-3.5 Turbo
40
Avg. score
GPT-5.4 Mini
52
GPT-5.4 Mini
GPT-5.4 Mini leads by 9.0
GPT-5.4 Mini leads by 22.8
GPT-5.4 Mini
GPT-5.4 Mini leads by 12.4
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-3.5 Turbo
149.2 tok/s
Rank #42/136 · confidence 4
GPT-5.4 Mini
winner203.4 tok/s
Rank #23/136 · confidence 4
GPT-3.5 Turbo
winner0.77 s
Rank #28/136 · confidence 4
GPT-5.4 Mini
9.70 s
Rank #71/136 · confidence 4
GPT-3.5 Turbo
winner0.77 s
Rank #39/136 · confidence 4
GPT-5.4 Mini
9.70 s
Rank #113/136 · confidence 4
GPT-3.5 Turbo
winner$1.50/M
Rank #53/162 · confidence 4
GPT-5.4 Mini
$4.50/M
Rank #103/162 · confidence 4
GPT-3.5 Turbo
winner$0.750/M
Rank #59/162 · confidence 4
GPT-5.4 Mini
$1.69/M
Rank #96/162 · confidence 4
GPT-3.5 Turbo
winner$0.500/M
Rank #69/162 · confidence 4
GPT-5.4 Mini
$0.750/M
Rank #95/162 · confidence 4
GPT-3.5 Turbo
29.7%
Rank #186/187 · confidence 4
GPT-5.4 Mini
winner82.3%
Rank #63/187 · confidence 4
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-3.5 Turbo | GPT-5.4 Mini |
|---|---|---|
Winner: GPT-5.4 Mini | GPT-3.5 Turbo gpt-3.5-turbo-1106 No audit yet | GPT-5.4 Mini gpt-5.4-mini Audit score 97 10010086100 |
Winner: GPT-5.4 Mini | GPT-3.5 Turbo gpt-3.5-turbo-1106 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-3.5 Turbo | GPT-5.4 Mini |
|---|---|---|
5 tests | GPT-3.5 Turbo speed / latency 54 tok/s / 9591ms input / output No data | GPT-5.4 Mini speed / latency N/A / N/A input / output No data |
5 tests | GPT-3.5 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-3.5 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-3.5 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 |
0 tests | GPT-3.5 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-3.5 Turbo gpt-3.5-turbo-0125 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%.
Output
| Features | Text inputText outputTool callingStructured outputsJSON mode | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
