Data points: 75
Model compare
The readout for GPT-5.2 and O3 Pro, before the detailed comparison sheet.
Weighted outcome: O3 Pro. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
O3 Pro
O3 Pro has the higher weighted result; Model A / B score 40 to 60.
Evidence depth
75 data points
Includes 6 benchmark rows, 0 audit samples, and 6 provider examples.
Selection signal
Start with O3 Pro
The charts below split 12 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.
This report only uses LMSpeed data for GPT-5.2 and O3 Pro: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | GPT-5.2 | O3 Pro |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 40.0 pts | 60.0 pts |
| Benchmark category leads | 0 categories | 1 categories |
| Operational advantages | Cheapest input price, Free providers, Provider coverage | No data |
| Context window | 400K tokens | 200K tokens |
| Max output | 128K tokens | 100K tokens |
| Modalities | Input FileImageText Output Text |
The overall result weights benchmark capability categories at 80% and price, API speed/latency, and availability at 20%. Recent test volume does not affect the winner, and missing benchmark categories are excluded.
| Model compare | GPT-5.2 | O3 Pro |
|---|---|---|
| Developer | OpenAI | OpenAI |
| Released | Dec 2025 | Jun 2025 |
| Parameters | No data | No data |
| Tokenizer | GPT | GPT |
| Knowledge cutoff | No data | 2024-06-30 |
| OpenRouter ID | openai/gpt-5.2 | openai/o3-pro |
| References | No data | No data |
This report only uses LMSpeed data for GPT-5.2 and O3 Pro: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
GPT-5.2
GPT-5.2 has these operational advantages: Cheapest input price, Free providers, Provider coverage.
O3 Pro
O3 Pro leads these benchmark categories: Knowledge.
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
52.8
Avg. score
O3 Pro
57.7
GPT-5.2
GPT-5.2
Tied
O3 Pro leads by 3.9
GPT-5.2
No data
GPT-5.2
GPT-5.2
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
GPT-5.2
winner$1.75/M
Rank #120/162 · confidence 4
O3 Pro
$20.00/M
Rank #159/162 · confidence 4
GPT-5.2
winner$4.81/M
Rank #132/162 · confidence 4
O3 Pro
$35.00/M
Rank #159/162 · confidence 4
GPT-5.2
winner$14.00/M
Rank #133/162 · confidence 4
O3 Pro
$80.00/M
Rank #160/162 · confidence 4
GPT-5.2
71.2%
Rank #110/188 · confidence 4
O3 Pro
winner84.5%
Rank #48/188 · confidence 4
GPT-5.2
winner90.3
Rank #19/96 · confidence 3 · eval date 2025-12-11
O3 Pro
84.5
Rank #47/96 · confidence 1 · eval date 2025-04-16
GPT-5.2
winner42.2
Rank #22/99 · confidence 3 · eval date 2025-12-11
O3 Pro
32.5
Rank #54/99 · confidence 1 · eval date 2025-04-16
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-5.2 | O3 Pro |
|---|---|---|
| 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 | O3 Pro |
|---|---|---|
15 tests | GPT-5.2 speed / latency 56 tok/s / 1798ms input / output No data | O3 Pro speed / latency N/A / N/A input / output No data |
5 tests | GPT-5.2 speed / latency 64 tok/s / 3553ms input / output No data | O3 Pro speed / latency N/A / N/A input / output No data |
5 tests | GPT-5.2 speed / latency 54 tok/s / 1449ms input / output No data | O3 Pro speed / latency N/A / N/A input / output No data |
5 tests | GPT-5.2 speed / latency 32 tok/s / 1965ms input / output No data | O3 Pro speed / latency N/A / N/A input / output No data |
0 tests | GPT-5.2 speed / latency N/A / N/A input / output No data | O3 Pro speed / latency N/A / N/A input / output No data |
GPT-5.2 gpt-5.2 speed / latency No data input / output $0/request | O3 Pro o3-pro speed / latency No data input / output $11.76/request |
Weighted outcome: O3 Pro. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Input
Output
| Features | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
