Data points: 84
Model compare
The readout for GPT-3.5 Turbo and GPT-4o, before the detailed comparison sheet.
Weighted outcome: GPT-4o. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
GPT-4o
GPT-4o has the higher weighted result; Model A / B score 38.7 to 61.3.
Evidence depth
84 data points
Includes 9 benchmark rows, 0 audit samples, and 6 provider examples.
Selection signal
Start with GPT-4o
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-4o: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | GPT-3.5 Turbo | GPT-4o |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 38.7 pts | 61.3 pts |
| Benchmark category leads | 1 categories | 2 categories |
| Operational advantages | Average speed, First-token latency, Free providers | Cheapest input price, Provider coverage |
| Context window | 16.4K tokens | 128K tokens |
| Max output | 4.1K tokens | 16.4K tokens |
| Modalities | Input Text Output Text | Input 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-3.5 Turbo | GPT-4o |
|---|---|---|
| Developer | OpenAI | OpenAI |
| Released | Jan 2024 | Nov 2024 |
| Parameters | No data | No data |
| Tokenizer | GPT | GPT |
| Knowledge cutoff | 2021-09-30 | 2023-10-31 |
| OpenRouter ID | openai/gpt-3.5-turbo | openai/gpt-4o |
| References | No data | No data |
This report only uses LMSpeed data for GPT-3.5 Turbo and GPT-4o: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
GPT-3.5 Turbo
GPT-3.5 Turbo is stronger in benchmark categories (Coding) and operational dimensions (Average speed, First-token latency, Free providers).
GPT-4o
GPT-4o is stronger in benchmark categories (Reasoning, 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-3.5 Turbo
40
Avg. score
GPT-4o
44
GPT-4o
GPT-3.5 Turbo leads by 8.0
GPT-4o leads by 6.8
GPT-4o
GPT-4o leads by 4.8
GPT-4o
GPT-4o
GPT-4o
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
GPT-3.5 Turbo
0.70 s
Rank #25/139 · confidence 4
GPT-4o
winner0.49 s
Rank #8/139 · confidence 4
GPT-3.5 Turbo
0.70 s
Rank #34/139 · confidence 4
GPT-4o
winner0.49 s
Rank #12/139 · confidence 4
GPT-3.5 Turbo
138.2 tok/s
Rank #39/139 · confidence 4
GPT-4o
winner194.4 tok/s
Rank #21/139 · confidence 4
GPT-3.5 Turbo
winner$1.50/M
Rank #54/163 · confidence 4
GPT-4o
$10.00/M
Rank #122/163 · confidence 4
GPT-3.5 Turbo
winner$0.750/M
Rank #60/163 · confidence 4
GPT-4o
$4.38/M
Rank #129/163 · confidence 4
GPT-3.5 Turbo
winner$0.500/M
Rank #70/163 · confidence 4
GPT-4o
$2.50/M
Rank #133/163 · confidence 4
GPT-3.5 Turbo
46.2%
Rank #124/125 · confidence 4
GPT-4o
winner74.8%
Rank #90/125 · confidence 4
GPT-3.5 Turbo
29.7%
Rank #186/187 · confidence 4
GPT-4o
winner54.3%
Rank #155/187 · confidence 4
GPT-3.5 Turbo
44.1%
Rank #69/72 · confidence 4
GPT-4o
winner75.9%
Rank #55/72 · confidence 4
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-3.5 Turbo | GPT-4o |
|---|---|---|
| No completed audits are available from shared providers yet. | ||
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | GPT-3.5 Turbo | GPT-4o |
|---|---|---|
82 tests | GPT-3.5 Turbo speed / latency N/A / N/A input / output No data | GPT-4o speed / latency 82 tok/s / 3100ms input / output No data |
30 tests | GPT-3.5 Turbo speed / latency 127 tok/s / 743ms input / output No data | GPT-4o speed / latency 105 tok/s / 1970ms input / output No data |
20 tests | GPT-3.5 Turbo speed / latency N/A / N/A input / output No data | GPT-4o speed / latency 88 tok/s / 1593ms input / output No data |
5 tests | GPT-3.5 Turbo speed / latency 54 tok/s / 9591ms input / output No data | GPT-4o 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-4o speed / latency 48 tok/s / 13138ms input / output No data |
GPT-3.5 Turbo gpt-3.5-turbo-16k speed / latency No data input / output $0/request | GPT-4o gpt-4o-2024-08-06 speed / latency No data input / output $0/request |
Weighted outcome: GPT-4o. 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 modeWeb search |
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