Data points: 125
The readout for GPT-4o and GPT-OSS, before the detailed comparison sheet.
Decision read
GPT-OSS
GPT-OSS currently has the stronger profile, with verified wins split 0 to 6.
Evidence depth
125 data points
Includes 29 benchmark rows, 0 audit samples, and 10 provider examples.
Selection signal
Start with GPT-OSS
The charts below split 39 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-4o vs GPT-OSSgpt-4o-vs-gpt-oss | Model A GPT-4o | Model B GPT-OSS |
|---|---|---|
| Overall leader | Contender | Leading |
| Verified metric wins | 0 wins | 6 wins |
| Where it leads | No data | Cheapest input price, Average speed, First-token latency, 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-4o
42.8
Avg. score
GPT-OSS
56.5
Selected category
Instruction following
GPT-OSS leads by 34.7
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
GPT-4o
winner42.0
Rank #56/82 · confidence 1 · eval date 2024-05-13
GPT-OSS
34.0
Rank #61/82 · confidence 1 · eval date 2025-08-05
GPT-4o
117.2 tok/s
Rank #30/78 · confidence 4
GPT-OSS
winner332.9 tok/s
Rank #1/78 · confidence 4
GPT-4o
0.56 s
Rank #11/78 · confidence 4
GPT-OSS
winner0.49 s
Rank #4/78 · confidence 4
GPT-4o
winner0.56 s
Rank #9/78 · confidence 4
GPT-OSS
6.50 s
Rank #39/78 · confidence 4
GPT-4o
$4.38/M
Rank #72/95 · confidence 4
GPT-OSS
winner$0.262/M
Rank #13/95 · confidence 4
GPT-4o
$2.50/M
Rank #77/95 · confidence 4
GPT-OSS
winner$0.150/M
Rank #13/95 · confidence 4
GPT-4o
$10.00/M
Rank #67/95 · confidence 4
GPT-OSS
winner$0.600/M
Rank #14/95 · confidence 4
GPT-4o
winner44.4
Rank #41/58 · confidence 1 · eval date 2024-05-13
GPT-OSS
29.2
Rank #47/58 · confidence 1 · eval date 2025-08-05
GPT-4o
74.0%
Rank #62/74 · confidence 4
GPT-OSS
winner77.5%
Rank #53/74 · confidence 4
GPT-4o
52.1%
Rank #97/103 · confidence 4
GPT-OSS
winner67.2%
Rank #73/103 · confidence 4
GPT-4o
2.9%
Rank #103/103 · confidence 4
GPT-OSS
winner5.2%
Rank #73/103 · confidence 4
GPT-4o
31.7%
Rank #57/70 · confidence 4
GPT-OSS
winner70.7%
Rank #25/70 · confidence 4
GPT-4o
33.3
Rank #52/63 · confidence 1 · eval date 2024-05-13
GPT-OSS
winner38.9
Rank #40/63 · confidence 1 · eval date 2025-08-05
GPT-4o
8.3
Rank #52/59 · confidence 1 · eval date 2024-05-13
GPT-OSS
winner23.5
Rank #43/59 · confidence 1 · eval date 2025-08-05
GPT-4o
winner31.6
Rank #57/70 · confidence 1 · eval date 2024-05-13
GPT-OSS
21.2
Rank #63/70 · confidence 1 · eval date 2025-08-05
GPT-4o
33.1%
Rank #73/101 · confidence 4
GPT-OSS
winner36.0%
Rank #65/101 · confidence 4
GPT-4o
37.9
Rank #49/58 · confidence 1 · eval date 2024-05-13
GPT-OSS
winner91.2
Rank #4/58 · confidence 1 · eval date 2025-08-05
GPT-4o
3.3
Rank #62/63 · confidence 1 · eval date 2024-05-13
GPT-OSS
winner18.5
Rank #33/63 · confidence 1 · eval date 2025-08-05
GPT-4o
54.3
Rank #60/63 · confidence 1 · eval date 2024-05-13
GPT-OSS
winner78.2
Rank #40/63 · confidence 1 · eval date 2025-08-05
GPT-4o
11.2
Rank #58/66 · confidence 1 · eval date 2024-05-13
GPT-OSS
winner23.8
Rank #44/66 · confidence 1 · eval date 2025-08-05
GPT-4o
19.7
Rank #51/58 · confidence 1 · eval date 2024-05-13
GPT-OSS
winner21.5
Rank #49/58 · confidence 1 · eval date 2025-08-05
GPT-4o
33.2
Rank #59/67 · confidence 1 · eval date 2024-05-13
GPT-OSS
winner39.1
Rank #53/67 · confidence 1 · eval date 2025-08-05
GPT-4o
winner42.0
Rank #35/52 · confidence 1 · eval date 2024-05-13
GPT-OSS
36.4
Rank #37/52 · confidence 1 · eval date 2025-08-05
GPT-4o
winner62.0
Rank #32/60 · confidence 1 · eval date 2024-05-13
GPT-OSS
24.1
Rank #53/60 · confidence 1 · eval date 2025-08-05
GPT-4o
874.0
Rank #47/48 · confidence 1 · eval date 2024-05-13
GPT-OSS
winner1011.0
Rank #46/48 · confidence 1 · eval date 2025-08-05
GPT-4o
34.3
Rank #56/60 · confidence 1 · eval date 2024-05-13
GPT-OSS
winner69.0
Rank #26/60 · confidence 1 · eval date 2025-08-05
GPT-4o
winner59.9
Rank #43/58 · confidence 1 · eval date 2024-05-13
GPT-OSS
45.9
Rank #52/58 · confidence 1 · eval date 2025-08-05
GPT-4o
25.1
Rank #52/58 · confidence 1 · eval date 2024-05-13
GPT-OSS
winner65.8
Rank #39/58 · confidence 1 · eval date 2025-08-05
GPT-4o
winner38.3
Rank #50/68 · confidence 1 · eval date 2024-05-13
GPT-OSS
32.6
Rank #57/68 · confidence 1 · eval date 2025-08-05
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-4o | 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-4o | GPT-OSS |
|---|---|---|
40 tests | GPT-4o speed / latency N/A / N/A input / output No data | GPT-OSS |
This report only uses LMSpeed data for GPT-4o and GPT-OSS: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | GPT-4o | GPT-OSS |
|---|---|---|
| When to choose each model | GPT-4o GPT-4o does not clearly lead on the verified metrics here, so check provider-specific pricing before choosing. | GPT-OSS GPT-OSS is stronger when you prioritize Cheapest input price, Average speed, First-token latency, Free providers, Provider coverage, Recent tests. |
TL;DR: GPT-OSS leads across 125 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from GPT-4o vs GPT-OSS into nearby model comparisons with enough verified LMSpeed data.
| Model metadata | GPT-4o 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 | Nov 2024 | Aug 2025 |
| Modalities | Input TextImageFile Output Text | Input Text Output Text |
| Features | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeWeb search | Text inputText outputTool callingReasoning |
| Parameters | No data | 120B |
| Tokenizer | GPT | GPT |
| Knowledge cutoff | 2023-10-31 | 2024-06-30 |
| OpenRouter ID | openai/gpt-4o-2024-11-20 | openai/gpt-oss-120b:free |
| References | No data | No data |
speed / latency
41 tok/s / 2851ms
input / output
No data
小水管 API30 tests | GPT-4o speed / latency N/A / N/A input / output No data | GPT-OSS speed / latency 1047 tok/s / 867ms input / output No data |
|---|
Rnglg2 API20 tests | GPT-4o speed / latency N/A / N/A input / output No data | GPT-OSS speed / latency 338 tok/s / 2317ms input / output No data |
|---|
速创API20 tests | GPT-4o speed / latency 88 tok/s / 1593ms input / output No data | GPT-OSS speed / latency N/A / N/A input / output No data |
|---|
钠 API20 tests | GPT-4o speed / latency N/A / N/A input / output No data | GPT-OSS speed / latency 908 tok/s / 3109ms input / output No data |
|---|
GPT-4o gpt-4o speed / latency No data input / output $0.0013/M / $0.0050/M | GPT-OSS gpt-oss-20b speed / latency No data input / output $0.037/M / $0.075/M |
GPT-4o gpt-4o speed / latency No data input / output $0.0013/M / $0.0050/M | GPT-OSS gpt-oss-20b speed / latency No data input / output $0.037/M / $0.075/M |
GPT-4o gpt-4o-all-c speed / latency No data input / output $0.0082/M / $0.0082/M | GPT-OSS gpt-oss-120b speed / latency No data input / output $0.037/M / $0.308/M |
GPT-4o gpt-4o-all speed / latency No data input / output $0.0082/M / $0.0082/M | GPT-OSS gpt-oss-120b speed / latency No data input / output $0.055/M / $0.219/M |
GPT-4o gpt-4o-all speed / latency No data input / output $0.0082/M / $0.0082/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.
