Data points: 65
The readout for GPT-3.5 Turbo and GPT-5.4, before the detailed comparison sheet.
Decision read
GPT-5.4
GPT-5.4 currently has the stronger profile, with verified wins split 2 to 4.
Evidence depth
65 data points
Includes 0 benchmark rows, 0 audit samples, and 7 provider examples.
Selection signal
Start with GPT-5.4
The charts below split 7 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.
Model compare GPT-3.5 Turbo vs GPT-5.4gpt-3-5-turbo-vs-gpt-5-4 | Model A GPT-3.5 Turbo | Model B GPT-5.4 |
|---|---|---|
| Overall leader | Contender | Leading |
| Verified metric wins | 2 wins | 4 wins |
| Where it leads | Average speed, First-token latency | Cheapest input price, Free providers, Provider coverage, Recent tests |
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
-
Avg. score
GPT-5.4
66.4
Selected category
Agents
GPT-5.4
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
No shared professional benchmark scores are available yet.
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-3.5 Turbo | GPT-5.4 |
|---|---|---|
| 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-5.4 |
|---|---|---|
39 tests | GPT-3.5 Turbo speed / latency N/A / N/A input / output No data | GPT-5.4 |
This report only uses LMSpeed data for GPT-3.5 Turbo and GPT-5.4: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | GPT-3.5 Turbo | GPT-5.4 |
|---|---|---|
| When to choose each model | GPT-3.5 Turbo GPT-3.5 Turbo is stronger when you prioritize Average speed, First-token latency. | GPT-5.4 GPT-5.4 is stronger when you prioritize Cheapest input price, Free providers, Provider coverage, Recent tests. |
TL;DR: GPT-5.4 leads across 65 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from GPT-3.5 Turbo vs GPT-5.4 into nearby model comparisons with enough verified LMSpeed data.
| Model metadata | GPT-3.5 Turbo exposes 4.1K tokens; notable signals: Text input, Text output, Tool calling, Structured outputs. | GPT-5.4 exposes 1.1M tokens; notable signals: Text input, Image input, File input, Text output. |
|---|---|---|
| Developer | OpenAI | OpenAI |
| Context window | 4.1K tokens | 1.1M tokens |
| Max output | 4.1K tokens | 128K tokens |
| Released | Jan 2024 | Mar 2026 |
| Modalities | Input Text Output Text | Input TextImageFile Output Text |
| Features | Text inputText outputTool callingStructured outputsJSON mode | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
| Parameters | No data | No data |
| Tokenizer | GPT | GPT |
| Knowledge cutoff | 2021-09-30 | No data |
| OpenRouter ID | openai/gpt-3.5-turbo-0613 | openai/gpt-5.4 |
| References | No data | No data |
speed / latency
43 tok/s / 12778ms
input / output
No data
Sub2API20 tests | GPT-3.5 Turbo speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 51 tok/s / 4032ms input / output No data |
|---|
Sub2API20 tests | GPT-3.5 Turbo speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 34 tok/s / 1748ms input / output No data |
|---|
QQ Code10 tests | GPT-3.5 Turbo speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 55 tok/s / 2903ms input / output No data |
|---|
Sub2API10 tests | GPT-3.5 Turbo speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 54 tok/s / 1369ms input / output No data |
|---|
GPT-3.5 Turbo gpt-3.5-turbo-1106 speed / latency No data input / output $0.041/M / $0.082/M | GPT-5.4 gpt-5.4-xhigh speed / latency No data input / output $0.103/M / $0.616/M |
GPT-3.5 Turbo gpt-3.5-turbo-0125 speed / latency No data input / output $0.600/M / $1.20/M | GPT-5.4 gpt-5.4-high speed / latency No data input / output $0.050/M / $0.050/M |
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
