Data points: 146
The readout for GPT-5.2 and GPT-5.5, before the detailed comparison sheet.
Decision read
GPT-5.2
GPT-5.2 currently has the stronger profile, with verified wins split 5 to 1.
Evidence depth
146 data points
Includes 38 benchmark rows, 1 audit samples, and 7 provider examples.
Selection signal
Start with GPT-5.2
The charts below split 46 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-5.2 vs GPT-5.5gpt-5-2-vs-gpt-5-5 | Model A GPT-5.2 | Model B GPT-5.5 |
|---|---|---|
| Overall leader | Leading | Contender |
| Verified metric wins | 5 wins | 1 wins |
| Where it leads | 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-5.2
61.8
Avg. score
GPT-5.5
64.9
Selected category
Reasoning
GPT-5.5 leads by 21.2
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
GPT-5.2
75.0
Rank #23/127 · confidence 3 · eval date 2025-12-11
GPT-5.5
winner78.0
Rank #17/127 · confidence 3 · eval date 2026-04-23
GPT-5.2
winner0.72 s
Rank #23/139 · confidence 4
GPT-5.5
23.27 s
Rank #99/139 · confidence 4
GPT-5.2
winner0.72 s
Rank #31/139 · confidence 4
GPT-5.5
23.27 s
Rank #127/139 · confidence 4
GPT-5.2
winner69.1 tok/s
Rank #90/139 · confidence 4
GPT-5.5
63.5 tok/s
Rank #94/139 · confidence 4
GPT-5.2
winner$1.75/M
Rank #126/167 · confidence 4
GPT-5.5
$5.00/M
Rank #151/167 · confidence 4
GPT-5.2
winner$4.81/M
Rank #138/167 · confidence 4
GPT-5.5
$11.25/M
Rank #156/167 · confidence 4
GPT-5.2
winner$14.00/M
Rank #139/167 · confidence 4
GPT-5.5
$30.00/M
Rank #156/167 · confidence 4
GPT-5.2
52.9
Rank #7/9 · confidence 3 · eval date 2025-12-11
GPT-5.5
winner85.0
Rank #1/9 · confidence 3 · eval date 2026-04-23
GPT-5.2
71.2%
Rank #110/187 · confidence 4
GPT-5.5
winner93.5%
Rank #3/187 · confidence 4
GPT-5.2
72.7
Rank #12/88 · confidence 3 · eval date 2025-12-11
GPT-5.5
winner74.3
Rank #4/88 · confidence 3 · eval date 2026-04-23
GPT-5.2
winner83.4
Rank #5/70 · confidence 3 · eval date 2025-12-11
GPT-5.5
81.9
Rank #9/70 · confidence 3 · eval date 2026-04-23
GPT-5.2
11.6
Rank #18/72 · confidence 3 · eval date 2025-12-11
GPT-5.5
winner27.1
Rank #5/72 · confidence 3 · eval date 2026-04-23
GPT-5.2
7.3%
Rank #107/186 · confidence 4
GPT-5.5
winner44.3%
Rank #7/186 · confidence 4
GPT-5.2
47.0
Rank #14/86 · confidence 3 · eval date 2025-12-11
GPT-5.5
winner60.6
Rank #2/86 · confidence 3 · eval date 2026-04-23
GPT-5.2
53.5
Rank #6/33 · confidence 3 · eval date 2025-12-11
GPT-5.5
winner69.8
Rank #2/33 · confidence 3 · eval date 2026-04-23
GPT-5.2
52.1
Rank #16/95 · confidence 3 · eval date 2025-12-11
GPT-5.5
winner56.1
Rank #3/95 · confidence 3 · eval date 2026-04-23
GPT-5.2
40.4%
Rank #62/184 · confidence 4
GPT-5.5
winner56.1%
Rank #4/184 · confidence 4
GPT-5.2
55.6
Rank #25/37 · confidence 3 · eval date 2025-12-11
GPT-5.5
winner58.6
Rank #12/37 · confidence 3 · eval date 2026-04-23
GPT-5.2
winner73.7
Rank #32/100 · confidence 3 · eval date 2025-12-11
GPT-5.5
72.5
Rank #36/100 · confidence 3 · eval date 2026-04-23
GPT-5.2
40.7
Rank #10/47 · confidence 3 · eval date 2025-12-11
GPT-5.5
winner51.7
Rank #4/47 · confidence 3 · eval date 2026-04-23
GPT-5.2
18.8
Rank #11/35 · confidence 3 · eval date 2025-12-11
GPT-5.5
winner35.4
Rank #6/35 · confidence 3 · eval date 2026-04-23
GPT-5.2
56.6
Rank #29/59 · confidence 3 · eval date 2025-12-11
GPT-5.5
winner70.4
Rank #17/59 · confidence 3 · eval date 2026-04-23
GPT-5.2
43.8
Rank #15/89 · confidence 3 · eval date 2025-12-11
GPT-5.5
winner56.9
Rank #2/89 · confidence 3 · eval date 2026-04-23
GPT-5.2
90.3
Rank #17/95 · confidence 3 · eval date 2025-12-11
GPT-5.5
winner93.5
Rank #3/95 · confidence 3 · eval date 2026-04-23
GPT-5.2
35.4
Rank #20/95 · confidence 3 · eval date 2025-12-11
GPT-5.5
winner44.3
Rank #4/95 · confidence 3 · eval date 2026-04-23
GPT-5.2
42.2
Rank #20/98 · confidence 3 · eval date 2025-12-11
GPT-5.5
winner54.8
Rank #4/98 · confidence 3 · eval date 2026-04-23
GPT-5.2
winner88.4
Rank #6/92 · confidence 3 · eval date 2025-12-11
GPT-5.5
82.2
Rank #15/92 · confidence 3 · eval date 2026-04-23
GPT-5.2
79.7
Rank #42/89 · confidence 3 · eval date 2025-12-11
GPT-5.5
winner85.5
Rank #27/89 · confidence 3 · eval date 2026-04-23
GPT-5.2
79.5
Rank #10/27 · confidence 3 · eval date 2025-12-11
GPT-5.5
winner81.2
Rank #6/27 · confidence 3 · eval date 2026-04-23
GPT-5.2
winner80.8
Rank #11/81 · confidence 3 · eval date 2025-12-11
GPT-5.5
58.3
Rank #54/81 · confidence 3 · eval date 2026-04-23
GPT-5.2
1237.0
Rank #32/61 · confidence 3 · eval date 2025-12-11
GPT-5.5
winner1290.0
Rank #19/61 · confidence 3 · eval date 2026-04-23
GPT-5.2
75.4
Rank #21/87 · confidence 3 · eval date 2025-12-11
GPT-5.5
winner75.9
Rank #16/87 · confidence 3 · eval date 2026-04-23
GPT-5.2
52.6
Rank #47/95 · confidence 3 · eval date 2025-12-11
GPT-5.5
winner96.1
Rank #2/95 · confidence 3 · eval date 2026-04-23
GPT-5.2
46.5
Rank #29/50 · confidence 3 · eval date 2025-12-11
GPT-5.5
winner72.9
Rank #2/50 · confidence 3 · eval date 2026-04-23
GPT-5.2
34.3
Rank #6/19 · confidence 3 · eval date 2025-12-11
GPT-5.5
winner42.7
Rank #2/19 · confidence 3 · eval date 2026-04-23
GPT-5.2
47.3
Rank #20/21 · confidence 3 · eval date 2025-12-11
GPT-5.5
winner78.7
Rank #4/21 · confidence 3 · eval date 2026-04-23
GPT-5.2
65.8
Rank #19/25 · confidence 3 · eval date 2025-12-11
GPT-5.5
winner84.4
Rank #7/25 · confidence 3 · eval date 2026-04-23
GPT-5.2
84.8
Rank #45/85 · confidence 3 · eval date 2025-12-11
GPT-5.5
winner93.9
Rank #25/85 · confidence 3 · eval date 2026-04-23
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-5.2 | GPT-5.5 |
|---|---|---|
Winner: GPT-5.2 | GPT-5.2 gpt-5.2 Audit score 70 5942 |
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | GPT-5.2 | GPT-5.5 |
|---|---|---|
15 tests | GPT-5.2 speed / latency 56 tok/s / 1798ms input / output No data | GPT-5.5 |
This report only uses LMSpeed data for GPT-5.2 and GPT-5.5: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | GPT-5.2 | GPT-5.5 |
|---|---|---|
| When to choose each model | GPT-5.2 GPT-5.2 is stronger when you prioritize Average speed, First-token latency, Free providers, Provider coverage, Recent tests. | GPT-5.5 GPT-5.5 is stronger when you prioritize Cheapest input price. |
TL;DR: GPT-5.2 leads across 146 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from GPT-5.2 vs GPT-5.5 into nearby model comparisons with enough verified LMSpeed data.
| Cheapest input price |
| Model metadata | GPT-5.2 exposes 400K tokens; notable signals: Text input, Image input, File input, Text output. | GPT-5.5 exposes 1.1M tokens; notable signals: Text input, Image input, File input, Text output. |
|---|---|---|
| Developer | OpenAI | OpenAI |
| Context window | 400K tokens | 1.1M tokens |
| Max output | 128K tokens | 128K tokens |
| Released | Dec 2025 | Apr 2026 |
| Modalities | Input FileImageText Output Text | Input FileImageText Output Text |
| Features | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputFile inputText outputTool callingStructured outputsJSON mode |
| Parameters | No data | No data |
| Tokenizer | GPT | GPT |
| Knowledge cutoff | No data | 2025-12-01 |
| OpenRouter ID | openai/gpt-5.2 | openai/gpt-5.5 |
| References | No data | No data |
GPT-5.5 gpt-5.5-openai-compact No audit yet |
speed / latency
N/A / N/A
input / output
No data
钠 API10 tests | GPT-5.2 speed / latency 60 tok/s / 3331ms input / output No data | GPT-5.5 speed / latency 59 tok/s / 3856ms input / output No data |
|---|
BUZZ5 tests | GPT-5.2 speed / latency 64 tok/s / 3553ms input / output No data | GPT-5.5 speed / latency N/A / N/A input / output No data |
|---|
ModelPool5 tests | GPT-5.2 speed / latency 64 tok/s / 5256ms input / output No data | GPT-5.5 speed / latency N/A / N/A input / output No data |
|---|
N89医费5 tests | GPT-5.2 speed / latency N/A / N/A input / output No data | GPT-5.5 speed / latency 35 tok/s / 3941ms input / output No data |
|---|
GPT-5.2 gpt-5.2 speed / latency No data input / output $0/M/$0/M | GPT-5.5 gpt-5.5-openai-compact speed / latency No data input / output $0/M/$0/M |
GPT-5.2 gpt-5.2 speed / latency No data input / output $0/request | GPT-5.5 gpt-5.5 speed / latency No data input / output $0/request |
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
