Data points: 86
The readout for GPT-5 and GPT-5.4, before the detailed comparison sheet.
Decision read
GPT-5.4
GPT-5.4 currently has the stronger profile, with verified wins split 2 to 4.
Evidence depth
86 data points
Includes 8 benchmark rows, 1 audit samples, and 9 provider examples.
Selection signal
Start with GPT-5.4
The charts below split 18 high-signal samples across speed, scores, and audit health.
Model compare GPT-5 vs GPT-5.4gpt-5-vs-gpt-5-4 | Model A GPT-5 | Model B GPT-5.4 |
|---|---|---|
| Overall leader | Contender | Leading |
| Verified metric wins | 2 wins | 4 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 | GPT-5.4 |
|---|---|---|
| GPQA | 85.4%#31 |
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-5 | GPT-5.4 |
|---|---|---|
Winner: GPT-5.4 | GPT-5 gpt-5 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 | GPT-5.4 |
|---|---|---|
100 tests | GPT-5 speed / latency N/A / N/A input / output No data | GPT-5.4 |
This report only uses LMSpeed data for GPT-5 and GPT-5.4: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | GPT-5 | GPT-5.4 |
|---|---|---|
| When to choose each model | GPT-5 GPT-5 is stronger when you prioritize Cheapest input price, Average speed. | GPT-5.4 GPT-5.4 is stronger when you prioritize First-token latency, Free providers, Provider coverage, Recent tests. |
TL;DR: GPT-5.4 leads across 86 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from GPT-5 vs GPT-5.4 into nearby model comparisons with enough verified LMSpeed data.
| Model metadata | GPT-5 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 | Aug 2025 | Mar 2026 |
| Modalities | Input FileImageText Output Text | Input TextImageFile Output Text |
| Features | Text inputImage inputFile inputText outputStructured outputsJSON mode | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
| Parameters | No data | No data |
| Tokenizer | GPT | GPT |
| Knowledge cutoff | 2024-09-30 | No data |
| OpenRouter ID | openai/gpt-5-chat | openai/gpt-5.4 |
| References | No data | No data |
| SciCode | 42.9%#31 | 56.6%#3 |
|---|
| HLE | 26.5%#24 | 41.6%#4 |
|---|
| Input price | $1.25/M#30 | $2.50/M#37 |
|---|
| Output price | $10.00/M#41 | $15.00/M#44 |
|---|
| Output speed | 109.6 tok/s#44 | 92.4 tok/s#56 |
|---|
| Blended price | $3.44/M#58 | $5.63/M#63 |
|---|
| Time to first answer token | 62.85 s#98 | 134.24 s#111 |
|---|
90
speed / latency
57 tok/s / 3556ms
input / output
No data
天宫造物50 tests | GPT-5 speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 50 tok/s / 7305ms input / output No data |
|---|
巨量API39 tests | GPT-5 speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 43 tok/s / 12778ms input / output No data |
|---|
星见雅 API25 tests | GPT-5 speed / latency 38 tok/s / 15844ms input / output No data | GPT-5.4 speed / latency 49 tok/s / 5435ms input / output No data |
|---|
Sub2API20 tests | GPT-5 speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 34 tok/s / 1748ms input / output No data |
|---|
GPT-5 gpt-5 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 gpt-5-high speed / latency No data input / output $0.0068/M / $0.0068/M | GPT-5.4 gpt-5.4-openai-compact speed / latency No data input / output $0.342/M / $2.05/M |
GPT-5 gpt-5-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 |
GPT-5 gpt-5-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.
