Data points: 82
Model compare
The readout for GPT-5.4 and GPT-5 Nano, before the detailed comparison sheet.
Weighted outcome: GPT-5.4. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
GPT-5.4
GPT-5.4 has the higher weighted result; Model A / B score 92 to 8.
Evidence depth
82 data points
Includes 6 benchmark rows, 1 audit samples, and 6 provider examples.
Selection signal
Start with GPT-5.4
The charts below split 13 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-5.4 and GPT-5 Nano: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | GPT-5.4 | GPT-5 Nano |
|---|---|---|
| Overall leader | Leading | Contender |
| Weighted overall score | 92.0 pts | 8.0 pts |
| Benchmark category leads | 3 categories | 0 categories |
| Operational advantages | First-token latency, Free providers, Provider coverage | Cheapest input price, Average speed |
| Context window | 1.1M tokens | 400K tokens |
| Max output | 128K tokens | 128K tokens |
| Modalities | Input TextImageFile 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-5.4 | GPT-5 Nano |
|---|---|---|
| Developer | OpenAI | OpenAI |
| Released | Mar 2026 | Aug 2025 |
| Parameters | No data | No data |
| Tokenizer | GPT | GPT |
| Knowledge cutoff | No data | 2024-05-31 |
| OpenRouter ID | openai/gpt-5.4 | openai/gpt-5-nano |
| References | No data | No data |
This report only uses LMSpeed data for GPT-5.4 and GPT-5 Nano: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
GPT-5.4
GPT-5.4 is stronger in benchmark categories (Coding, Reasoning, Math) and operational dimensions (First-token latency, Free providers, Provider coverage).
GPT-5 Nano
GPT-5 Nano has these operational advantages: Cheapest input price, Average speed.
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
57.4
Avg. score
GPT-5 Nano
50
GPT-5.4
GPT-5.4 leads by 11.6
GPT-5.4 leads by 8.6
GPT-5.4
GPT-5.4 leads by 7.0
No data
GPT-5.4
GPT-5.4
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
GPT-5.4
$2.50/M
Rank #131/162 · confidence 4
GPT-5 Nano
winner$0.050/M
Rank #2/162 · confidence 4
GPT-5.4
$5.63/M
Rank #135/162 · confidence 4
GPT-5 Nano
winner$0.138/M
Rank #5/162 · confidence 4
GPT-5.4
$15.00/M
Rank #136/162 · confidence 4
GPT-5 Nano
winner$0.400/M
Rank #12/162 · confidence 4
GPT-5.4
winner10.6%
Rank #91/187 · confidence 4
GPT-5 Nano
8.2%
Rank #103/187 · confidence 4
GPT-5.4
winner74.8%
Rank #96/188 · confidence 4
GPT-5 Nano
67.6%
Rank #120/188 · confidence 4
GPT-5.4
winner47.1%
Rank #24/185 · confidence 4
GPT-5 Nano
36.6%
Rank #100/185 · confidence 4
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-5.4 | GPT-5 Nano |
|---|---|---|
Winner: GPT-5.4 | GPT-5.4 gpt-5.4 Audit score 93 1008486100 | GPT-5 Nano gpt-5-nano No audit yet |
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | GPT-5.4 | GPT-5 Nano |
|---|---|---|
20 tests | GPT-5.4 speed / latency 51 tok/s / 4032ms input / output No data | GPT-5 Nano speed / latency N/A / N/A input / output No data |
10 tests | GPT-5.4 speed / latency 88 tok/s / 6075ms input / output No data | GPT-5 Nano speed / latency N/A / N/A input / output No data |
10 tests | GPT-5.4 speed / latency 51 tok/s / 1443ms input / output No data | GPT-5 Nano speed / latency N/A / N/A input / output No data |
10 tests | GPT-5.4 speed / latency 54 tok/s / 1369ms input / output No data | GPT-5 Nano speed / latency N/A / N/A input / output No data |
10 tests | GPT-5.4 speed / latency 51 tok/s / 1093ms input / output No data | GPT-5 Nano speed / latency N/A / N/A input / output No data |
GPT-5.4 gpt-5.4 speed / latency No data input / output $0/request | GPT-5 Nano gpt-5-nano speed / latency No data input / output $0/request |
Weighted outcome: GPT-5.4. 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 |
|---|
