Data points: 81
The readout for GPT-5 and GPT-5 Nano, before the detailed comparison sheet.
Decision read
GPT-5
GPT-5 currently has the stronger profile, with verified wins split 3 to 2.
Evidence depth
81 data points
Includes 8 benchmark rows, 0 audit samples, and 8 provider examples.
Selection signal
Start with GPT-5
The charts below split 16 high-signal samples across speed, scores, and audit health.
Model compare GPT-5 vs GPT-5 Nanogpt-5-vs-gpt-5-nano | Model A GPT-5 | Model B GPT-5 Nano |
|---|---|---|
| Overall leader | Leading | Contender |
| Verified metric wins | 3 wins | 2 wins |
| Where it leads | First-token latency, Provider coverage, Recent tests | Cheapest input price, Average speed |
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
| Metric | GPT-5 | GPT-5 Nano |
|---|---|---|
| Input price | $1.25/M#30 |
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-5 | GPT-5 Nano |
|---|---|---|
| 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 Nano |
|---|---|---|
20 tests | GPT-5 speed / latency 95 tok/s / 1234ms input / output No data | GPT-5 Nano |
This report only uses LMSpeed data for GPT-5 and GPT-5 Nano: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | GPT-5 | GPT-5 Nano |
|---|---|---|
| When to choose each model | GPT-5 GPT-5 is stronger when you prioritize First-token latency, Provider coverage, Recent tests. | GPT-5 Nano GPT-5 Nano is stronger when you prioritize Cheapest input price, Average speed. |
TL;DR: GPT-5 leads across 81 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from GPT-5 vs GPT-5 Nano into nearby model comparisons with enough verified LMSpeed data.
| Model metadata | GPT-5 exposes 128K tokens; notable signals: Text input, Image input, File input, Text output. | GPT-5 Nano exposes 400K tokens; notable signals: Text input, Image input, File input, Text output. |
|---|---|---|
| Developer | OpenAI | OpenAI |
| Context window | 128K tokens | 400K tokens |
| Max output | 16.4K tokens | No data |
| Released | Aug 2025 | Aug 2025 |
| Modalities | Input FileImageText Output Text | Input TextImageFile Output Text |
| Features | Text inputImage inputFile inputText outputStructured outputsJSON mode | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
| Parameters | No data | No data |
| Tokenizer | GPT | GPT |
| Knowledge cutoff | 2024-09-30 | 2024-05-31 |
| OpenRouter ID | openai/gpt-5-chat | openai/gpt-5-nano |
| References | No data | No data |
| Output price | $10.00/M#41 | $0.400/M#6 |
|---|
| Blended price | $3.44/M#58 | $0.138/M#7 |
|---|
| MMLU-Pro | 87.1%#7 | 78.0%#49 |
|---|
| LiveCodeBench | 84.6%#11 | 78.9%#20 |
|---|
| HLE | 26.5%#24 | 8.2%#71 |
|---|
| GPQA | 85.4%#31 | 67.6%#86 |
|---|
| SciCode | 42.9%#31 | 36.6%#69 |
|---|
speed / latency
N/A / N/A
input / output
No data
YUNWU API10 tests | GPT-5 speed / latency N/A / N/A input / output No data | GPT-5 Nano speed / latency 102 tok/s / 12165ms input / output No data |
|---|
EasyMore5 tests | GPT-5 speed / latency 46 tok/s / 6577ms input / output No data | GPT-5 Nano speed / latency N/A / N/A input / output No data |
|---|
Lido LLM5 tests | GPT-5 speed / latency N/A / N/A input / output No data | GPT-5 Nano speed / latency 56 tok/s / 19880ms input / output No data |
|---|
N1N5 tests | GPT-5 speed / latency 102 tok/s / 948ms input / output No data | GPT-5 Nano speed / latency N/A / N/A input / output No data |
|---|
GPT-5 gpt-5-chat speed / latency No data input / output $0.037/M / $0.300/M | GPT-5 Nano gpt-5-nano speed / latency No data input / output $0.0000/M / $0.0002/M |
GPT-5 gpt-5-chat speed / latency No data input / output $0.037/M / $0.300/M | GPT-5 Nano gpt-5-nano speed / latency No data input / output $0.0000/M / $0.0002/M |
GPT-5 gpt-5 speed / latency No data input / output $0.051/M / $0.411/M | GPT-5 Nano gpt-5-nano-2025-08-07 speed / latency No data input / output $0.0021/M / $0.016/M |
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
