Data points: 65
The readout for GPT-5 and GPT-5.3, before the detailed comparison sheet.
Decision read
GPT-5
GPT-5 currently has the stronger profile, with verified wins split 5 to 1.
Evidence depth
65 data points
Includes 0 benchmark rows, 0 audit samples, and 9 provider examples.
Selection signal
Start with GPT-5
The charts below split 9 high-signal samples across speed, scores, and audit health.
Model compare GPT-5 vs GPT-5.3gpt-5-vs-gpt-5-3 | Model A GPT-5 | Model B GPT-5.3 |
|---|---|---|
| Overall leader | Leading | Contender |
| Verified metric wins | 5 wins | 1 wins |
| Where it leads | Cheapest input price, Average speed, Free providers, Provider coverage, Recent tests |
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
| Metric | GPT-5 | GPT-5.3 |
|---|---|---|
| No shared benchmark metrics are available yet. | ||
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-5 | GPT-5.3 |
|---|---|---|
| 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-5 | GPT-5.3 |
|---|---|---|
20 tests | GPT-5 speed / latency 95 tok/s / 1234ms input / output No data | GPT-5.3 |
This report only uses LMSpeed data for GPT-5 and GPT-5.3: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | GPT-5 | GPT-5.3 |
|---|---|---|
| When to choose each model | GPT-5 GPT-5 is stronger when you prioritize Cheapest input price, Average speed, Free providers, Provider coverage, Recent tests. | GPT-5.3 GPT-5.3 is stronger when you prioritize First-token latency. |
TL;DR: GPT-5 leads across 65 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from GPT-5 vs GPT-5.3 into nearby model comparisons with enough verified LMSpeed data.
| First-token latency |
| Model metadata | GPT-5 exposes 128K tokens; notable signals: Text input, Image input, File input, Text output. | GPT-5.3 exposes 128K tokens; notable signals: Text input, Image input, File input, Text output. |
|---|---|---|
| Developer | OpenAI | OpenAI |
| Context window | 128K tokens | 128K tokens |
| Max output | 16.4K tokens | 16.4K tokens |
| Released | Aug 2025 | Mar 2026 |
| Modalities | Input FileImageText Output Text | Input TextImageFile Output Text |
| Features | Text inputImage inputFile inputText outputStructured outputsJSON mode | Text inputImage inputFile inputText outputTool callingStructured outputsJSON mode |
| Parameters | No data | No data |
| Tokenizer | GPT | GPT |
| Knowledge cutoff | 2024-09-30 | No data |
| OpenRouter ID | openai/gpt-5-chat | openai/gpt-5.3-chat |
| References | No data | No data |
speed / latency
N/A / N/A
input / output
No data
N1N10 tests | GPT-5 speed / latency 102 tok/s / 948ms input / output No data | GPT-5.3 speed / latency 56 tok/s / 2764ms input / output No data |
|---|
小水管 API10 tests | GPT-5 speed / latency N/A / N/A input / output No data | GPT-5.3 speed / latency 64 tok/s / 2635ms input / output No data |
|---|
CaMeL AI5 tests | GPT-5 speed / latency N/A / N/A input / output No data | GPT-5.3 speed / latency 51 tok/s / 2246ms input / output No data |
|---|
EasyMore5 tests | GPT-5 speed / latency 46 tok/s / 6577ms input / output No data | GPT-5.3 speed / latency N/A / N/A input / output No data |
|---|
GPT-5 gpt-5-high speed / latency No data input / output $0.0068/M / $0.0068/M | GPT-5.3 gpt-5.3-chat-latest speed / latency No data input / output $10.27/M / $10.27/M |
GPT-5 gpt-5-all speed / latency No data input / output $0.0068/M / $0.0068/M | GPT-5.3 gpt-5.3-chat-latest speed / latency No data input / output $0.240/M / $1.92/M |
GPT-5 gpt-5-all speed / latency No data input / output $0.0068/M / $0.0068/M | GPT-5.3 gpt-5.3-chat-latest speed / latency No data input / output $0.240/M / $1.92/M |
GPT-5 gpt-5-all-c speed / latency No data input / output $0.0082/M / $0.0082/M | GPT-5.3 gpt-5.3-chat-latest speed / latency No data input / output $0.216/M / $1.73/M |
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
