Data points: 86
Model compare
The readout for GPT-5.4 and Qwen3.5 Plus, 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 96 to 4.
Evidence depth
86 data points
Includes 6 benchmark rows, 2 audit samples, and 7 provider examples.
Selection signal
Start with GPT-5.4
The charts below split 15 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 Qwen3.5 Plus: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | GPT-5.4 | Qwen3.5 Plus |
|---|---|---|
| Overall leader | Leading | Contender |
| Weighted overall score | 96.0 pts | 4.0 pts |
| Benchmark category leads | 3 categories | 0 categories |
| Operational advantages | Cheapest input price, First-token latency, Free providers, Provider coverage | Average speed |
| Context window | 1.1M tokens | 1M tokens |
| Max output | 128K tokens | 65.5K 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 | Qwen3.5 Plus |
|---|---|---|
| Developer | OpenAI | Alibaba |
| Released | Mar 2026 | Apr 2026 |
| Parameters | No data | No data |
| Tokenizer | GPT | Qwen3 |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | openai/gpt-5.4 | qwen/qwen3.5-plus-20260420 |
| References | No data | No data |
This report only uses LMSpeed data for GPT-5.4 and Qwen3.5 Plus: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
GPT-5.4
GPT-5.4 is stronger in benchmark categories (Agents, Coding, Math) and operational dimensions (Cheapest input price, First-token latency, Free providers, Provider coverage).
Qwen3.5 Plus
Qwen3.5 Plus has these operational advantages: 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
57.6
Avg. score
Qwen3.5 Plus
46.7
GPT-5.4 leads by 13.0
GPT-5.4 leads by 16.7
GPT-5.4
GPT-5.4
GPT-5.4 leads by 8.8
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
winner67.0
Rank #22/90 · confidence 3 · eval date 2026-03-05
Qwen3.5 Plus
51.0
Rank #62/90 · confidence 1 · eval date 2026-03-04
GPT-5.4
winner67.4
Rank #3/33 · confidence 3 · eval date 2026-03-05
Qwen3.5 Plus
15.7
Rank #24/33 · confidence 1 · eval date 2026-03-04
GPT-5.4
winner47.6
Rank #7/47 · confidence 3 · eval date 2026-03-05
Qwen3.5 Plus
21.0
Rank #28/47 · confidence 1 · eval date 2026-03-04
GPT-5.4
winner27.1
Rank #8/35 · confidence 3 · eval date 2026-03-05
Qwen3.5 Plus
2.1
Rank #32/35 · confidence 1 · eval date 2026-03-04
GPT-5.4
winner66.0
Rank #18/57 · confidence 3 · eval date 2026-03-05
Qwen3.5 Plus
39.8
Rank #38/57 · confidence 1 · eval date 2026-03-04
GPT-5.4
winner38.9
Rank #5/21 · confidence 3 · eval date 2026-03-05
Qwen3.5 Plus
18.5
Rank #15/21 · confidence 1 · eval date 2026-03-04
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-5.4 | Qwen3.5 Plus |
|---|---|---|
Winner: GPT-5.4 | GPT-5.4 gpt-5.4 Audit score 100 100100100100 | Qwen3.5 Plus qwen3.5-plus No audit yet |
Winner: GPT-5.4 | GPT-5.4 gpt-5.4 Audit score 93 1008486100 | Qwen3.5 Plus qwen3.5-plus-2026-02-15 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 | Qwen3.5 Plus |
|---|---|---|
50 tests | GPT-5.4 speed / latency 50 tok/s / 7305ms input / output No data | Qwen3.5 Plus speed / latency N/A / N/A input / output No data |
15 tests | GPT-5.4 speed / latency 71 tok/s / 1629ms input / output No data | Qwen3.5 Plus speed / latency 41 tok/s / 20086ms input / output No data |
10 tests | GPT-5.4 speed / latency 88 tok/s / 6075ms input / output No data | Qwen3.5 Plus 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 | Qwen3.5 Plus speed / latency N/A / N/A input / output No data |
10 tests | GPT-5.4 speed / latency 44 tok/s / 2518ms input / output No data | Qwen3.5 Plus speed / latency 54 tok/s / 4374ms input / output No data |
GPT-5.4 gpt-5.4 speed / latency No data input / output $0.014/request | Qwen3.5 Plus qwen3.5-plus speed / latency No data input / output $0.548/M | |
GPT-5.4 gpt-5.4 speed / latency No data input / output $0.171/M/$1.03/M | Qwen3.5 Plus qwen3.5-plus speed / latency No data input / output $0.014/M |
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 inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
