Data points: 87
The readout for GPT-5.4 and GPT-OSS, before the detailed comparison sheet.
Decision read
Tie
Tie currently has the stronger profile, with verified wins split 3 to 3.
Evidence depth
87 data points
Includes 8 benchmark rows, 1 audit samples, and 9 provider examples.
Selection signal
Tie
The charts below split 18 high-signal samples across speed, scores, and audit health.
Model compare GPT-5.4 vs GPT-OSSgpt-5-4-vs-gpt-oss | Model A GPT-5.4 | Model B GPT-OSS |
|---|---|---|
| Overall leader | Tie | Tie |
| Verified metric wins | 3 wins | 3 wins |
| Where it leads | Cheapest input price, Provider coverage, Recent tests | Average speed, First-token latency, Free providers |
| Model metadata | GPT-5.4 exposes 1.1M 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 | 1.1M tokens | 131.1K tokens |
| Max output | 128K tokens | 131.1K tokens |
| Released | Mar 2026 | Aug 2025 |
| Modalities | Input TextImageFile Output Text | Input Text Output Text |
| Features | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning | Text inputText outputTool callingReasoning |
| Parameters | No data | 120B |
| Tokenizer | GPT | GPT |
| Knowledge cutoff | No data | 2024-06-30 |
| OpenRouter ID | openai/gpt-5.4 | 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-5.4 | GPT-OSS |
|---|---|---|
| GPQA | 92.0%#3 | 61.1%#102 |
| Output price | $15.00/M#44 | $0.200/M#3 |
| SciCode | 56.6%#3 | 34.0%#79 |
| Blended price | $5.63/M#63 | $0.095/M#4 |
| HLE | 41.6%#4 | 5.1%#86 |
| Input price | $2.50/M#37 | $0.060/M#4 |
| Output speed | 92.4 tok/s#56 | 243.2 tok/s#6 |
| Time to first token | 134.24 s#110 | 0.50 s#10 |
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-5.4 | GPT-OSS |
|---|---|---|
钠 APIWinner: GPT-5.4 | GPT-5.4 gpt-5.4 Audit score 90 1008476100 | GPT-OSS gpt-oss-120b-medium No audit yet |
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | GPT-5.4 | GPT-OSS |
|---|---|---|
天宫造物50 tests | GPT-5.4 speed / latency 50 tok/s / 7305ms input / output No data | GPT-OSS speed / latency N/A / N/A input / output No data |
OpenRouter40 tests | GPT-5.4 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 API40 tests | GPT-5.4 speed / latency 49 tok/s / 5435ms input / output No data | GPT-OSS speed / latency 164 tok/s / 1247ms input / output No data |
素墨API35 tests | GPT-5.4 speed / latency N/A / N/A input / output No data | GPT-OSS speed / latency 347 tok/s / 2670ms input / output No data |
6345ywz API20 tests | GPT-5.4 speed / latency 41 tok/s / 6581ms input / output No data | GPT-OSS speed / latency 127 tok/s / 787ms input / output No data |
GPT-5.4 gpt-5.4-free speed / latency No data input / output $0/M / $0/M | GPT-OSS gpt-oss-120b speed / latency No data input / output $0.300/M / $1.20/M | |
GPT-5.4 gpt-5.4 speed / latency No data input / output $0.600/M / $4.80/M | GPT-OSS openai/gpt-oss-20b:free speed / latency No data input / output $0.0050/M / $0.0050/M | |
GPT-5.4 gpt-5.4-medium speed / latency No data input / output $0.014/M / $0.085/M | GPT-OSS gpt-oss-120b speed / latency No data input / output $0.0082/M / $0.041/M | |
GPT-5.4 gpt-5.4 speed / latency No data input / output $0.103/M / $0.616/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-5.4 and GPT-OSS: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | GPT-5.4 | GPT-OSS |
|---|---|---|
| When to choose each model | GPT-5.4 GPT-5.4 is stronger when you prioritize Cheapest input price, Provider coverage, Recent tests. | GPT-OSS GPT-OSS is stronger when you prioritize Average speed, First-token latency, Free providers. |
TL;DR: Tie leads across 87 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from GPT-5.4 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.
