Data points: 200
The readout for GPT-5.4 and GPT-5.5, before the detailed comparison sheet.
Decision read
GPT-5.4
GPT-5.4 currently has the stronger profile, with verified wins split 5 to 1.
Evidence depth
200 data points
Includes 55 benchmark rows, 4 audit samples, and 9 provider examples.
Selection signal
Start with GPT-5.4
The charts below split 68 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-5.4 vs GPT-5.5gpt-5-4-vs-gpt-5-5 | Model A GPT-5.4 | Model B GPT-5.5 |
|---|---|---|
| Overall leader | Leading | Contender |
| Verified metric wins | 5 wins | 1 wins |
| Where it leads | Cheapest input price, Average speed, 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-5.4
59
Avg. score
GPT-5.5
64.9
Selected category
Reasoning
GPT-5.5 leads by 25.0
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
GPT-5.4
winner85.0
Rank #4/127 · confidence 4 · eval date 2026-03-05
GPT-5.5
78.0
Rank #17/127 · confidence 3 · eval date 2026-04-23
GPT-5.4
winner0.68 s
Rank #19/139 · confidence 4
GPT-5.5
23.27 s
Rank #99/139 · confidence 4
GPT-5.4
winner0.68 s
Rank #26/139 · confidence 4
GPT-5.5
23.27 s
Rank #127/139 · confidence 4
GPT-5.4
winner103.9 tok/s
Rank #62/139 · confidence 4
GPT-5.5
63.5 tok/s
Rank #94/139 · confidence 4
GPT-5.4
winner$2.50/M
Rank #137/167 · confidence 4
GPT-5.5
$5.00/M
Rank #151/167 · confidence 4
GPT-5.4
winner$5.63/M
Rank #141/167 · confidence 4
GPT-5.5
$11.25/M
Rank #156/167 · confidence 4
GPT-5.4
winner$15.00/M
Rank #142/167 · confidence 4
GPT-5.5
$30.00/M
Rank #156/167 · confidence 4
GPT-5.4
74.8%
Rank #95/187 · confidence 4
GPT-5.5
winner93.5%
Rank #3/187 · confidence 4
GPT-5.4
74.0
Rank #5/88 · confidence 4 · eval date 2026-03-05
GPT-5.5
winner74.3
Rank #4/88 · confidence 3 · eval date 2026-04-23
GPT-5.4
winner87.5
Rank #4/70 · confidence 4 · eval date 2026-03-05
GPT-5.5
81.9
Rank #9/70 · confidence 3 · eval date 2026-04-23
GPT-5.4
23.4
Rank #6/72 · confidence 4 · eval date 2026-03-05
GPT-5.5
winner27.1
Rank #5/72 · confidence 3 · eval date 2026-04-23
GPT-5.4
10.6%
Rank #89/186 · confidence 4
GPT-5.5
winner44.3%
Rank #7/186 · confidence 4
GPT-5.4
winner85.3
Rank #1/12 · confidence 4 · eval date 2026-03-05
GPT-5.5
84.7
Rank #2/12 · confidence 3 · eval date 2026-04-23
GPT-5.4
winner56.6
Rank #2/95 · confidence 4 · eval date 2026-03-05
GPT-5.5
56.1
Rank #3/95 · confidence 3 · eval date 2026-04-23
GPT-5.4
57.6
Rank #4/86 · confidence 4 · eval date 2026-03-05
GPT-5.5
winner60.6
Rank #2/86 · confidence 3 · eval date 2026-04-23
GPT-5.4
67.4
Rank #3/33 · confidence 4 · eval date 2026-03-05
GPT-5.5
winner69.8
Rank #2/33 · confidence 3 · eval date 2026-04-23
GPT-5.4
71.0
Rank #9/54 · confidence 4 · eval date 2026-03-05
GPT-5.5
winner74.9
Rank #3/54 · confidence 3 · eval date 2026-04-23
GPT-5.4
47.1%
Rank #22/184 · confidence 4
GPT-5.5
winner56.1%
Rank #4/184 · confidence 4
GPT-5.4
winner86.4
Rank #6/100 · confidence 4 · eval date 2026-03-05
GPT-5.5
72.5
Rank #36/100 · confidence 3 · eval date 2026-04-23
GPT-5.4
57.7
Rank #15/37 · confidence 4 · eval date 2026-03-05
GPT-5.5
winner58.6
Rank #12/37 · confidence 3 · eval date 2026-04-23
GPT-5.4
47.6
Rank #7/47 · confidence 4 · eval date 2026-03-05
GPT-5.5
winner51.7
Rank #4/47 · confidence 3 · eval date 2026-04-23
GPT-5.4
27.1
Rank #8/35 · confidence 4 · eval date 2026-03-05
GPT-5.5
winner35.4
Rank #6/35 · confidence 3 · eval date 2026-04-23
GPT-5.4
winner70.7
Rank #16/59 · confidence 4 · eval date 2026-03-05
GPT-5.5
70.4
Rank #17/59 · confidence 3 · eval date 2026-04-23
GPT-5.4
winner96.8
Rank #1/92 · confidence 4 · eval date 2026-03-05
GPT-5.5
82.2
Rank #15/92 · confidence 3 · eval date 2026-04-23
GPT-5.4
50.0
Rank #9/89 · confidence 4 · eval date 2026-03-05
GPT-5.5
winner56.9
Rank #2/89 · confidence 3 · eval date 2026-04-23
GPT-5.4
92.0
Rank #9/95 · confidence 4 · eval date 2026-03-05
GPT-5.5
winner93.5
Rank #3/95 · confidence 3 · eval date 2026-04-23
GPT-5.4
41.6
Rank #6/95 · confidence 4 · eval date 2026-03-05
GPT-5.5
winner44.3
Rank #4/95 · confidence 3 · eval date 2026-04-23
GPT-5.4
51.4
Rank #8/98 · confidence 4 · eval date 2026-03-05
GPT-5.5
winner54.8
Rank #4/98 · confidence 3 · eval date 2026-04-23
GPT-5.4
92.8
Rank #7/23 · confidence 4 · eval date 2026-03-05
GPT-5.5
winner93.6
Rank #4/23 · confidence 3 · eval date 2026-04-23
GPT-5.4
5.7
Rank #17/28 · confidence 4 · eval date 2026-03-05
GPT-5.5
winner20.1
Rank #7/28 · confidence 3 · eval date 2026-04-23
GPT-5.4
39.8
Rank #11/15 · confidence 4 · eval date 2026-03-05
GPT-5.5
winner41.4
Rank #8/15 · confidence 3 · eval date 2026-04-23
GPT-5.4
winner88.6
Rank #19/89 · confidence 4 · eval date 2026-03-05
GPT-5.5
85.5
Rank #27/89 · confidence 3 · eval date 2026-04-23
GPT-5.4
82.1
Rank #3/8 · confidence 4 · eval date 2026-03-05
GPT-5.5
winner83.2
Rank #2/8 · confidence 3 · eval date 2026-04-23
GPT-5.4
53.2
Rank #3/5 · confidence 4 · eval date 2026-03-05
GPT-5.5
winner54.1
Rank #2/5 · confidence 3 · eval date 2026-04-23
GPT-5.4
81.2
Rank #6/27 · confidence 4 · eval date 2026-03-05
GPT-5.5
81.2
Rank #6/27 · confidence 3 · eval date 2026-04-23
GPT-5.4
78.4
Rank #15/57 · confidence 4 · eval date 2026-03-05
GPT-5.5
winner79.9
Rank #8/57 · confidence 3 · eval date 2026-04-23
GPT-5.4
1264.0
Rank #27/61 · confidence 4 · eval date 2026-03-05
GPT-5.5
winner1290.0
Rank #19/61 · confidence 3 · eval date 2026-04-23
GPT-5.4
winner60.0
Rank #48/81 · confidence 4 · eval date 2026-03-05
GPT-5.5
58.3
Rank #54/81 · confidence 3 · eval date 2026-04-23
GPT-5.4
73.9
Rank #24/87 · confidence 4 · eval date 2026-03-05
GPT-5.5
winner75.9
Rank #16/87 · confidence 3 · eval date 2026-04-23
GPT-5.4
33.3
Rank #4/21 · confidence 4 · eval date 2026-03-05
GPT-5.5
winner37.7
Rank #2/21 · confidence 3 · eval date 2026-04-23
GPT-5.4
87.5
Rank #9/95 · confidence 4 · eval date 2026-03-05
GPT-5.5
winner96.1
Rank #2/95 · confidence 3 · eval date 2026-04-23
GPT-5.4
79.0
Rank #4/11 · confidence 4 · eval date 2026-03-05
GPT-5.5
winner81.8
Rank #2/11 · confidence 3 · eval date 2026-04-23
GPT-5.4
64.9
Rank #4/50 · confidence 4 · eval date 2026-03-05
GPT-5.5
winner72.9
Rank #2/50 · confidence 3 · eval date 2026-04-23
GPT-5.4
38.9
Rank #3/19 · confidence 4 · eval date 2026-03-05
GPT-5.5
winner42.7
Rank #2/19 · confidence 3 · eval date 2026-04-23
GPT-5.4
6.0
Rank #5/5 · confidence 4 · eval date 2026-03-05
GPT-5.5
winner13.4
Rank #3/5 · confidence 3 · eval date 2026-04-23
GPT-5.4
75.0
Rank #7/21 · confidence 4 · eval date 2026-03-05
GPT-5.5
winner78.7
Rank #4/21 · confidence 3 · eval date 2026-04-23
GPT-5.4
54.6
Rank #5/21 · confidence 4 · eval date 2026-03-05
GPT-5.5
winner55.6
Rank #4/21 · confidence 3 · eval date 2026-04-23
GPT-5.4
75.1
Rank #11/45 · confidence 4 · eval date 2026-03-05
GPT-5.5
winner82.0
Rank #6/45 · confidence 3 · eval date 2026-04-23
GPT-5.4
41.1
Rank #10/50 · confidence 4 · eval date 2026-03-05
GPT-5.5
winner44.9
Rank #7/50 · confidence 3 · eval date 2026-04-23
GPT-5.4
82.7
Rank #14/25 · confidence 4 · eval date 2026-03-05
GPT-5.5
winner84.4
Rank #7/25 · confidence 3 · eval date 2026-04-23
GPT-5.4
70.6
Rank #12/22 · confidence 4 · eval date 2026-03-05
GPT-5.5
winner75.3
Rank #7/22 · confidence 3 · eval date 2026-04-23
GPT-5.4
44.8
Rank #10/44 · confidence 4 · eval date 2026-03-05
GPT-5.5
winner49.7
Rank #9/44 · confidence 3 · eval date 2026-04-23
GPT-5.4
1395.0
Rank #12/50 · confidence 4 · eval date 2026-03-05
GPT-5.5
winner1494.0
Rank #10/50 · confidence 3 · eval date 2026-04-23
GPT-5.4
15.3
Rank #14/19 · confidence 4 · eval date 2026-03-05
GPT-5.5
winner17.0
Rank #12/19 · confidence 3 · eval date 2026-04-23
GPT-5.4
87.1
Rank #38/85 · confidence 4 · eval date 2026-03-05
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-5.4 | GPT-5.5 |
|---|---|---|
Winner: GPT-5.4 | GPT-5.4 gpt-5.4 Audit score 93 100 |
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | GPT-5.4 | GPT-5.5 |
|---|---|---|
50 tests | GPT-5.4 speed / latency 50 tok/s / 7305ms input / output No data | GPT-5.5 |
This report only uses LMSpeed data for GPT-5.4 and GPT-5.5: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | GPT-5.4 | GPT-5.5 |
|---|---|---|
| When to choose each model | GPT-5.4 GPT-5.4 is stronger when you prioritize Cheapest input price, Average speed, Free providers, Provider coverage, Recent tests. | GPT-5.5 GPT-5.5 is stronger when you prioritize First-token latency. |
TL;DR: GPT-5.4 leads across 200 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from GPT-5.4 vs GPT-5.5 into nearby model comparisons with enough verified LMSpeed data.
| First-token latency |
| Model metadata | GPT-5.4 exposes 1.1M 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 | 1.1M tokens | 1.1M tokens |
| Max output | 128K tokens | 128K tokens |
| Released | Mar 2026 | Apr 2026 |
| Modalities | Input TextImageFile 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-5.4 | openai/gpt-5.5 |
| References | No data | No data |
GPT-5.5 15/gpt-5.5 No audit yet |
钠 APIWinner: GPT-5.4 | GPT-5.4 gpt-5.4 Audit score 90 1008476100 | GPT-5.5 gpt-5.5 Audit score 74 72727279 |
|---|
VSLLMWinner: GPT-5.5 | GPT-5.4 gpt-5.4 No audit yet | GPT-5.5 gpt-5.5 Audit score 87 848480100 |
|---|
TokenFluxWinner: GPT-5.4 | GPT-5.4 gpt-5.4 Audit score 83 727980100 | GPT-5.5 gpt-5.5-openai-compact No audit yet |
|---|
speed / latency
N/A / N/A
input / output
No data
KJK API25 tests | GPT-5.4 speed / latency 58 tok/s / 4453ms input / output No data | GPT-5.5 speed / latency N/A / N/A input / output No data |
|---|
XShuLab Sub2API15 tests | GPT-5.4 speed / latency 24 tok/s / 2652ms input / output No data | GPT-5.5 speed / latency N/A / N/A input / output No data |
|---|
0CHAT10 tests | GPT-5.4 speed / latency 51 tok/s / 2526ms input / output No data | GPT-5.5 speed / latency N/A / N/A input / output No data |
|---|
GGBand API10 tests | GPT-5.4 speed / latency 61 tok/s / 3483ms input / output No data | GPT-5.5 speed / latency N/A / N/A input / output No data |
|---|
GPT-5.4 gpt-5.4-openai-compact 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-5.4 gpt-5.4 speed / latency No data input / output $0/M/$0/M | GPT-5.5 openai/gpt-5.5 speed / latency No data input / output $0.411/M/$2.47/M |
GPT-5.4 gpt-5.4 speed / latency No data input / output $0/M/$0/M | GPT-5.5 gpt-5.5-openai-compact speed / latency No data input / output $75.00/M/$450.00/M |
GPT-5.4 gpt-5.4-2026-03-05 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.
