Data points: 83
The readout for GPT-5 and GPT-OSS, before the detailed comparison sheet.
Decision read
GPT-OSS
GPT-OSS currently has the stronger profile, with verified wins split 2 to 4.
Evidence depth
83 data points
Includes 8 benchmark rows, 0 audit samples, and 9 provider examples.
Selection signal
Start with GPT-OSS
The charts below split 17 high-signal samples across speed, scores, and audit health.
Model compare GPT-5 vs GPT-OSSgpt-5-vs-gpt-oss | Model A GPT-5 | Model B GPT-OSS |
|---|---|---|
| Overall leader | Contender | Leading |
| Verified metric wins | 2 wins | 4 wins |
| Where it leads | Cheapest input price, Provider coverage | Average speed, First-token latency, Free providers, Recent tests |
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
| Metric | GPT-5 | GPT-OSS |
|---|---|---|
| Output price | $10.00/M#41 |
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-5 | GPT-OSS |
|---|---|---|
| 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-OSS |
|---|---|---|
40 tests | GPT-5 speed / latency N/A / N/A input / output No data | GPT-OSS |
This report only uses LMSpeed data for GPT-5 and GPT-OSS: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | GPT-5 | GPT-OSS |
|---|---|---|
| When to choose each model | GPT-5 GPT-5 is stronger when you prioritize Cheapest input price, Provider coverage. | GPT-OSS GPT-OSS is stronger when you prioritize Average speed, First-token latency, Free providers, Recent tests. |
TL;DR: GPT-OSS leads across 83 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from GPT-5 vs GPT-OSS 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-OSS exposes 131.1K tokens; notable signals: Text input, Text output, Tool calling, Reasoning. |
|---|---|---|
| Developer | OpenAI | No data |
| Context window | 128K tokens | 131.1K tokens |
| Max output | 16.4K tokens | 131.1K tokens |
| Released | Aug 2025 | Aug 2025 |
| Modalities | Input FileImageText Output Text | Input Text Output Text |
| Features | Text inputImage inputFile inputText outputStructured outputsJSON mode | Text inputText outputTool callingReasoning |
| Parameters | No data | 120B |
| Tokenizer | GPT | GPT |
| Knowledge cutoff | 2024-09-30 | 2024-06-30 |
| OpenRouter ID | openai/gpt-5-chat | openai/gpt-oss-120b:free |
| References | No data | No data |
| Blended price | $3.44/M#58 | $0.095/M#4 |
|---|
| Input price | $1.25/M#30 | $0.060/M#4 |
|---|
| Output speed | 109.6 tok/s#44 | 243.2 tok/s#6 |
|---|
| MMLU-Pro | 87.1%#7 | 71.8%#64 |
|---|
| Time to first token | 62.85 s#104 | 0.50 s#10 |
|---|
| LiveCodeBench | 84.6%#11 | 65.2%#36 |
|---|
| HLE | 26.5%#24 | 5.1%#86 |
|---|
speed / latency
41 tok/s / 2851ms
input / output
No data
素墨API35 tests | GPT-5 speed / latency N/A / N/A input / output No data | GPT-OSS speed / latency 347 tok/s / 2670ms input / output No data |
|---|
星见雅 API25 tests | GPT-5 speed / latency 38 tok/s / 15844ms input / output No data | GPT-OSS speed / latency 164 tok/s / 1247ms input / output No data |
|---|
Rnglg2 API20 tests | GPT-5 speed / latency N/A / N/A input / output No data | GPT-OSS speed / latency 338 tok/s / 2317ms input / output No data |
|---|
V-API20 tests | GPT-5 speed / latency 95 tok/s / 1234ms input / output No data | GPT-OSS speed / latency N/A / N/A input / output No data |
|---|
GPT-5 gpt-5 speed / latency No data input / output $0.0006/M / $0.0050/M | GPT-OSS gpt-oss-20b speed / latency No data input / output $0.037/M / $0.075/M |
GPT-5 gpt-5 speed / latency No data input / output $0.0006/M / $0.0050/M | GPT-OSS gpt-oss-20b speed / latency No data input / output $0.037/M / $0.075/M |
GPT-5 gpt-5-high speed / latency No data input / output $0.0068/M / $0.0068/M | GPT-OSS gpt-oss-120b speed / latency No data input / output $0.151/M / $0.603/M |
GPT-5 gpt-5-all speed / latency No data input / output $0.0068/M / $0.0068/M | GPT-OSS gpt-oss-120b speed / latency No data input / output $0.055/M / $0.219/M |
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
