Data points: 82
The readout for GPT-5.2 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
82 data points
Includes 8 benchmark rows, 0 audit samples, and 10 provider examples.
Selection signal
Start with GPT-OSS
The charts below split 18 high-signal samples across speed, scores, and audit health.
Model compare GPT-5.2 vs GPT-OSSgpt-5-2-vs-gpt-oss | Model A GPT-5.2 | 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 |
| Model metadata | GPT-5.2 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 | Dec 2025 | Aug 2025 |
| Modalities | Input FileImageText Output Text | Input Text Output Text |
| Features | Text inputImage inputFile inputText outputTool callingStructured outputsJSON mode | Text inputText outputTool callingReasoning |
| Parameters | No data | 120B |
| Tokenizer | GPT | GPT |
| Knowledge cutoff | No data | 2024-06-30 |
| OpenRouter ID | openai/gpt-5.2-chat | openai/gpt-oss-120b:free |
| References | No data | No data |
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
| Metric | GPT-5.2 | GPT-OSS |
|---|---|---|
| Output price | $14.00/M#43 | $0.200/M#3 |
| Blended price | $4.81/M#62 | $0.095/M#4 |
| Input price | $1.75/M#35 | $0.060/M#4 |
| LiveCodeBench | 88.9%#4 | 65.2%#36 |
| MMLU-Pro | 87.4%#6 | 71.8%#64 |
| Output speed | 72.8 tok/s#71 | 243.2 tok/s#6 |
| GPQA | 90.3%#9 | 61.1%#102 |
| HLE | 35.4%#9 | 5.1%#86 |
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-5.2 | 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-5.2 | GPT-OSS |
|---|---|---|
OpenRouter40 tests | GPT-5.2 speed / latency N/A / N/A input / output No data | GPT-OSS speed / latency 41 tok/s / 2851ms input / output No data |
星见雅 API35 tests | GPT-5.2 speed / latency 52 tok/s / 2671ms input / output No data | GPT-OSS speed / latency 164 tok/s / 1247ms input / output No data |
素墨API35 tests | GPT-5.2 speed / latency N/A / N/A input / output No data | GPT-OSS speed / latency 347 tok/s / 2670ms input / output No data |
Rnglg2 API25 tests | GPT-5.2 speed / latency 55 tok/s / 1434ms input / output No data | GPT-OSS speed / latency 338 tok/s / 2317ms input / output No data |
钠 API25 tests | GPT-5.2 speed / latency 60 tok/s / 3331ms input / output No data | GPT-OSS speed / latency 908 tok/s / 3109ms input / output No data |
GPT-5.2 gpt-5.2 speed / latency No data input / output $0.0027/M / $0.0027/M | GPT-OSS gpt-oss-120b speed / latency No data input / output $0.151/M / $0.603/M | |
GPT-5.2 gpt-5.2-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 | |
GPT-5.2 gpt-5.2-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 | |
GPT-5.2 gpt-5.2-all speed / latency No data input / output $0.010/M / $0.010/M | GPT-OSS gpt-oss-120b speed / latency No data input / output $0.082/M / $0.329/M | |
GPT-5.2 gpt-5.2 speed / latency No data input / output $0.072/M / $0.575/M | GPT-OSS gpt-oss-120b speed / latency No data input / output $0.012/M / $0.103/M |
This report only uses LMSpeed data for GPT-5.2 and GPT-OSS: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | GPT-5.2 | GPT-OSS |
|---|---|---|
| When to choose each model | GPT-5.2 GPT-5.2 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 82 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from GPT-5.2 vs GPT-OSS into nearby model comparisons with enough verified LMSpeed data.
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
