Data points: 65
The readout for GPT-OSS and Nemotron 3 Ultra, before the detailed comparison sheet.
Decision read
GPT-OSS
GPT-OSS currently has the stronger profile, with verified wins split 4 to 0.
Evidence depth
65 data points
Includes 0 benchmark rows, 0 audit samples, and 8 provider examples.
Selection signal
Start with GPT-OSS
The charts below split 8 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-OSS vs Nemotron 3 Ultragpt-oss-vs-nemotron-3-ultra-550b-a55b | Model A GPT-OSS | Model B Nemotron 3 Ultra |
|---|---|---|
| Overall leader | Leading | Contender |
| Verified metric wins | 4 wins | 0 wins |
| Where it leads | 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-OSS
-
Avg. score
Nemotron 3 Ultra
48.3
Selected category
Coding
Nemotron 3 Ultra
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-OSS | Nemotron 3 Ultra |
|---|---|---|
| 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-OSS | Nemotron 3 Ultra |
|---|---|---|
35 tests | GPT-OSS speed / latency 1061 tok/s / 857ms input / output No data |
This report only uses LMSpeed data for GPT-OSS and Nemotron 3 Ultra: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | GPT-OSS | Nemotron 3 Ultra |
|---|---|---|
| When to choose each model | GPT-OSS GPT-OSS is stronger when you prioritize Cheapest input price, Free providers, Provider coverage, Recent tests. | Nemotron 3 Ultra Nemotron 3 Ultra does not clearly lead on the verified metrics here, so check provider-specific pricing before choosing. |
TL;DR: GPT-OSS leads across 65 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from GPT-OSS vs Nemotron 3 Ultra into nearby model comparisons with enough verified LMSpeed data.
| No data |
| Model metadata | GPT-OSS exposes 131.1K tokens; notable signals: Text input, Text output, Tool calling, Reasoning. | Nemotron 3 Ultra exposes 1M tokens; notable signals: Text input, Text output, Tool calling, Structured outputs. |
|---|---|---|
| Developer | No data | NVIDIA |
| Context window | 131.1K tokens | 1M tokens |
| Max output | 131.1K tokens | 16.4K tokens |
| Released | Aug 2025 | No data |
| Modalities | Input Text Output Text | Input Text Output Text |
| Features | Text inputText outputTool callingReasoning | Text inputText outputTool callingStructured outputsJSON modeReasoning |
| Parameters | 120B | 550B / 55B active |
| Tokenizer | GPT | Other |
| Knowledge cutoff | 2024-06-30 | No data |
| OpenRouter ID | openai/gpt-oss-120b:free | nvidia/nemotron-3-ultra-550b-a55b |
| References | No data | No data |
Nemotron 3 Ultra
speed / latency
N/A / N/A
input / output
No data
6345ywz API10 tests | GPT-OSS speed / latency 473 tok/s / 827ms input / output No data | Nemotron 3 Ultra speed / latency N/A / N/A input / output No data |
|---|
WSocket AI10 tests | GPT-OSS speed / latency 125 tok/s / 2302ms input / output No data | Nemotron 3 Ultra speed / latency N/A / N/A input / output No data |
|---|
ChooseC API5 tests | GPT-OSS speed / latency 243 tok/s / 2621ms input / output No data | Nemotron 3 Ultra speed / latency N/A / N/A input / output No data |
|---|
Future Hub5 tests | GPT-OSS speed / latency 1345 tok/s / 384ms input / output No data | Nemotron 3 Ultra speed / latency N/A / N/A input / output No data |
|---|
GPT-OSS openai/gpt-oss-20b:free speed / latency No data input / output $0/M / $0/M | Nemotron 3 Ultra nvidia/nemotron-3-ultra-550b-a55b speed / latency No data input / output $0.500/M / $2.50/M |
GPT-OSS openai/gpt-oss-20b:free speed / latency No data input / output $0/M / $0/M | Nemotron 3 Ultra nvidia/nemotron-3-ultra-550b-a55b speed / latency No data input / output $0.500/M / $2.20/M |
GPT-OSS gpt-oss-120b speed / latency No data input / output $0/M / $0/M | Nemotron 3 Ultra nemotron-3-ultra-550b-a55b speed / latency No data input / output $1.00/M / $1.00/M |
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
