Data points: 77
The readout for GPT-5.4 and o3 Pro, before the detailed comparison sheet.
Decision read
GPT-5.4
GPT-5.4 currently has the stronger profile, with verified wins split 4 to 0.
Evidence depth
77 data points
Includes 7 benchmark rows, 0 audit samples, and 7 provider examples.
Selection signal
Start with GPT-5.4
The charts below split 14 high-signal samples across speed, scores, and audit health.
Model compare GPT-5.4 vs o3 Progpt-5-4-vs-o3-pro | Model A GPT-5.4 | Model B o3 Pro |
|---|---|---|
| Overall leader | Leading | Contender |
| Verified metric wins | 4 wins | 0 wins |
| Where it leads | Cheapest input price, Free providers, Provider coverage, Recent tests | No data |
| Model metadata | GPT-5.4 exposes 1.1M tokens; notable signals: Text input, Image input, File input, Text output. | o3 Pro exposes 200K tokens; notable signals: Text input, Image input, File input, Text output. |
| Developer | OpenAI | OpenAI |
| Context window | 1.1M tokens | 200K tokens |
| Max output | 128K tokens | 100K tokens |
| Released | Mar 2026 | Jun 2025 |
| Modalities | Input TextImageFile Output Text | Input TextFileImage Output Text |
| Features | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
| Parameters | No data | No data |
| Tokenizer | GPT | GPT |
| Knowledge cutoff | No data | 2024-06-30 |
| OpenRouter ID | openai/gpt-5.4 | openai/o3-pro |
| References | No data | No data |
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
| Metric | GPT-5.4 | o3 Pro |
|---|---|---|
| GPQA | 92.0%#3 | 84.5%#35 |
| Input price | $2.50/M#37 | $20.00/M#45 |
| Output price | $15.00/M#44 | $80.00/M#53 |
| Output speed | 92.4 tok/s#56 | 20.3 tok/s#112 |
| Blended price | $5.63/M#63 | $35.00/M#74 |
| Time to first answer token | 134.24 s#111 | 83.81 s#105 |
| Time to first token | 134.24 s#110 | 83.81 s#107 |
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-5.4 | 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-5.4 | o3 Pro |
|---|---|---|
Sub2API20 tests | GPT-5.4 speed / latency 51 tok/s / 4032ms input / output No data | o3 Pro speed / latency N/A / N/A input / output No data |
QQ Code10 tests | GPT-5.4 speed / latency 55 tok/s / 2903ms input / output No data | o3 Pro speed / latency N/A / N/A input / output No data |
Sub2API10 tests | GPT-5.4 speed / latency 54 tok/s / 1369ms input / output No data | o3 Pro speed / latency N/A / N/A input / output No data |
Sub2API10 tests | GPT-5.4 speed / latency 51 tok/s / 1093ms input / output No data | o3 Pro speed / latency N/A / N/A input / output No data |
微雨API10 tests | GPT-5.4 speed / latency 37 tok/s / 1721ms input / output No data | o3 Pro speed / latency N/A / N/A input / output No data |
GPT-5.4 gpt-5.4-free speed / latency No data input / output $0/M / $0/M | o3 Pro o3-pro-2025-06-10 speed / latency No data input / output $40.00/M / $160.00/M | |
GPT-5.4 gpt-5.4-medium speed / latency No data input / output $0.034/M / $0.205/M | o3 Pro o3-pro speed / latency No data input / output $0.027/M / $0.110/M |
This report only uses LMSpeed data for GPT-5.4 and o3 Pro: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | GPT-5.4 | o3 Pro |
|---|---|---|
| When to choose each model | GPT-5.4 GPT-5.4 is stronger when you prioritize Cheapest input price, Free providers, Provider coverage, Recent tests. | o3 Pro o3 Pro does not clearly lead on the verified metrics here, so check provider-specific pricing before choosing. |
TL;DR: GPT-5.4 leads across 77 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from GPT-5.4 vs o3 Pro 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.
