Data points: 78
Model compare
GPT-3.5 Turbo vs GPT-4o
The readout for GPT-3.5 Turbo and GPT-4o, before the detailed comparison sheet.
Key Takeaways
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
78 data points
Includes 6 benchmark rows, 0 audit samples, and 10 provider examples.
Selection signal
Start with GPT-4o
The charts below split 16 high-signal samples across speed, scores, and audit health.
Change comparison
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.
Comparison sheet
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 | Cheapest input price, Average speed, First-token latency | Free providers, Provider coverage |
| Context window | 16.4K tokens | 128K tokens |
| Max output | 4.1K tokens | 16.4K tokens |
| Modalities | Input Text Output Text | Input TextImageFile Output Text |
| Features | Text inputText outputTool callingStructured outputsJSON mode | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeWeb search |
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 metadata
Model metadata
| 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 |
When to choose each model
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 (Cheapest input price, Average speed, First-token latency).
GPT-4o
GPT-4o is stronger in benchmark categories (Reasoning, Math) and operational dimensions (Free providers, Provider coverage).
Benchmark score comparison
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
Category performance
Compare benchmark category scores on a 0-100 scale. Select a category to inspect the gap.
- Model A coverage
- 3 / 8
- Model B coverage
- 6 / 8
- Shared
- 3 shared categories
Avg. score
GPT-3.5 Turbo
40
Avg. score
GPT-4o
43
Agents
GPT-4o
Coding
GPT-3.5 Turbo leads by 2.8
Reasoning
GPT-4o leads by 6.5
Knowledge
GPT-4o
Math
GPT-4o leads by 4.4
Multilingual
No data
Multimodal
No data
Instruction following
GPT-4o
Professional benchmark details
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
Professional benchmark details
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
GPT-3.5 Turbo
winner$1.50/M
Rank #62/180 · confidence 4
GPT-4o
$10.00/M
Rank #138/180 · confidence 4
GPT-3.5 Turbo
winner$0.750/M
Rank #70/180 · confidence 4
GPT-4o
$4.38/M
Rank #145/180 · confidence 4
GPT-3.5 Turbo
winner$0.500/M
Rank #82/180 · confidence 4
GPT-4o
$2.50/M
Rank #150/180 · confidence 4
GPT-3.5 Turbo
46.2%
Rank #128/129 · confidence 4
GPT-4o
winner74.8%
Rank #90/129 · confidence 4
GPT-3.5 Turbo
29.7%
Rank #211/212 · confidence 4
GPT-4o
winner54.3%
Rank #178/212 · confidence 4
GPT-3.5 Turbo
44.1%
Rank #70/73 · confidence 4
GPT-4o
winner75.9%
Rank #55/73 · confidence 4
API audit comparison
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
API audit comparison
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. | ||
Provider examples
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
Provider examples
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 |
|---|---|---|
ChatAnywhere82 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 |
Dream API30 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 |
速创API20 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 |
EasyMore5 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 |
KFCV505 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-0613 speed / latency No data input / output $0/request | GPT-4o gpt-4o-all speed / latency No data input / output $0/request | |
GPT-3.5 Turbo gpt-3.5-turbo-0125 speed / latency No data input / output $0.055/M/$0.110/M | GPT-4o gpt-4o-all speed / latency No data input / output $0.0066/request | |
GPT-3.5 Turbo gpt-3.5-turbo-0125 speed / latency No data input / output $0.055/M/$0.110/M | GPT-4o gpt-4o-all speed / latency No data input / output $0.0066/request | |
GPT-3.5 Turbo gpt-3.5-turbo-0125 speed / latency No data input / output $0.062/M/$0.123/M | GPT-4o gpt-4o-all-c speed / latency No data input / output $0.0074/request | |
GPT-3.5 Turbo gpt-3.5-turbo speed / latency No data input / output $0.082/M/$0.164/M | GPT-4o gpt-4o-all speed / latency No data input / output $0.0099/request |
FAQ
Weighted outcome: GPT-4o. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
- Why is this comparison indexable?
- It has 6 verifiable comparison points, and both models have pricing or benchmark data.
- Are missing metrics invented?
- No. Metrics without LMSpeed data are omitted from this report.