Data points: 85
The readout for GPT-5.2 and GPT-5.4, before the detailed comparison sheet.
Decision read
Tie
Tie currently has the stronger profile, with verified wins split 3 to 3.
Evidence depth
85 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-5.2 vs GPT-5.4gpt-5-2-vs-gpt-5-4 | Model A GPT-5.2 | Model B GPT-5.4 |
|---|---|---|
| Overall leader | Tie | Tie |
| Verified metric wins | 3 wins | 3 wins |
| Where it leads | 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.
| Metric | GPT-5.2 | GPT-5.4 |
|---|---|---|
| GPQA | 90.3%#9 |
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-5.2 | GPT-5.4 |
|---|---|---|
Winner: GPT-5.4 | GPT-5.2 gpt-5.2 No audit yet | GPT-5.4 gpt-5.4 Audit score |
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | GPT-5.2 | GPT-5.4 |
|---|---|---|
125 tests | GPT-5.2 speed / latency N/A / N/A input / output No data | GPT-5.4 |
This report only uses LMSpeed data for GPT-5.2 and GPT-5.4: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | GPT-5.2 | GPT-5.4 |
|---|---|---|
| When to choose each model | GPT-5.2 GPT-5.2 is stronger when you prioritize Cheapest input price, Average speed, First-token latency. | GPT-5.4 GPT-5.4 is stronger when you prioritize Free providers, Provider coverage, Recent tests. |
TL;DR: Tie leads across 85 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from GPT-5.2 vs GPT-5.4 into nearby model comparisons with enough verified LMSpeed data.
| Model metadata | GPT-5.2 exposes 128K tokens; notable signals: Text input, Image input, File input, Text output. | GPT-5.4 exposes 1.1M tokens; notable signals: Text input, Image input, File input, Text output. |
|---|---|---|
| Developer | OpenAI | OpenAI |
| Context window | 128K tokens | 1.1M tokens |
| Max output | 16.4K tokens | 128K tokens |
| Released | Dec 2025 | Mar 2026 |
| Modalities | Input FileImageText Output Text | Input TextImageFile Output Text |
| Features | Text inputImage inputFile inputText outputTool callingStructured outputsJSON mode | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
| Parameters | No data | No data |
| Tokenizer | GPT | GPT |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | openai/gpt-5.2-chat | openai/gpt-5.4 |
| References | No data | No data |
| SciCode | 52.1%#9 | 56.6%#3 |
|---|
| HLE | 35.4%#9 | 41.6%#4 |
|---|
| Input price | $1.75/M#35 | $2.50/M#37 |
|---|
| Output price | $14.00/M#43 | $15.00/M#44 |
|---|
| Output speed | 72.8 tok/s#71 | 92.4 tok/s#56 |
|---|
| Blended price | $4.81/M#62 | $5.63/M#63 |
|---|
| Time to first token | 115.69 s#108 | 134.24 s#110 |
|---|
90
speed / latency
49 tok/s / 6084ms
input / output
No data
Mars HK100 tests | GPT-5.2 speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 57 tok/s / 3556ms input / output No data |
|---|
天宫造物50 tests | GPT-5.2 speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 50 tok/s / 7305ms input / output No data |
|---|
QuicklyAPI35 tests | GPT-5.2 speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 50 tok/s / 2467ms input / output No data |
|---|
星见雅 API35 tests | GPT-5.2 speed / latency 52 tok/s / 2671ms input / output No data | GPT-5.4 speed / latency 49 tok/s / 5435ms input / output No data |
|---|
GPT-5.2 gpt-5.2 speed / latency No data input / output $0/M / $0/M | GPT-5.4 gpt-5.4-openai-compact speed / latency No data input / output $75.00/M / $450.00/M |
GPT-5.2 gpt-5.2-openai-compact speed / latency No data input / output $0.0005/M / $0.0038/M | GPT-5.4 gpt-5.4-openai-compact speed / latency No data input / output $0.0007/M / $0.0041/M |
GPT-5.2 gpt-5.2 speed / latency No data input / output $0.0027/M / $0.0027/M | GPT-5.4 gpt-5.4-openai-compact speed / latency No data input / output $0.342/M / $2.05/M |
GPT-5.2 gpt-5.2-all speed / latency No data input / output $0.0068/M / $0.0068/M | GPT-5.4 gpt-5.4-2026-03-05 speed / latency No data input / output $0.342/M / $2.05/M |
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
