Data points: 45
Model compare
The readout for GPT-5.4 and Qwen3.5 Plus Thinking, 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 100 to 0.
Evidence depth
45 data points
Includes 0 benchmark rows, 0 audit samples, and 6 provider examples.
Selection signal
Start with GPT-5.4
The charts below split 6 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 Thinking: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | GPT-5.4 | Qwen3.5 Plus Thinking |
|---|---|---|
| Overall leader | Leading | Contender |
| Weighted overall score | 100.0 pts | 0.0 pts |
| Benchmark category leads | 0 categories | 0 categories |
| Operational advantages | Cheapest input price, Free providers, Provider coverage | No data |
| Context window | 1.1M tokens | No data |
| Max output | 128K tokens | No data |
| Modalities | Input TextImageFile Output Text | No data |
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 Thinking |
|---|---|---|
| Developer | OpenAI | No data |
| Released | Mar 2026 | No data |
| Parameters | No data | No data |
| Tokenizer | GPT | No data |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | openai/gpt-5.4 | No data |
| References | No data | No data |
This report only uses LMSpeed data for GPT-5.4 and Qwen3.5 Plus Thinking: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
GPT-5.4
GPT-5.4 has these operational advantages: Cheapest input price, Free providers, Provider coverage.
Qwen3.5 Plus Thinking
Qwen3.5 Plus Thinking does not clearly lead in the benchmark or operational dimensions shared by both models.
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
57.8
Avg. score
Qwen3.5 Plus Thinking
-
GPT-5.4
GPT-5.4
GPT-5.4
GPT-5.4
GPT-5.4
No data
GPT-5.4
GPT-5.4
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
No shared professional benchmark scores are available yet.
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-5.4 | Qwen3.5 Plus Thinking |
|---|---|---|
| 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 | Qwen3.5 Plus Thinking |
|---|---|---|
50 tests | GPT-5.4 speed / latency 50 tok/s / 7305ms input / output No data | Qwen3.5 Plus Thinking speed / latency N/A / N/A input / output No data |
5 tests | GPT-5.4 gpt-5.4 speed / latency 50 tok/s / 5476ms input / output $75.00/M/$600.00/M | Qwen3.5 Plus Thinking qwen3.5-plus-thinking speed / latency N/A / N/A input / output $150.00/M |
5 tests | GPT-5.4 speed / latency 51 tok/s / 5463ms input / output No data | Qwen3.5 Plus Thinking speed / latency N/A / N/A input / output No data |
5 tests | GPT-5.4 speed / latency 46 tok/s / 3291ms input / output No data | Qwen3.5 Plus Thinking speed / latency N/A / N/A input / output No data |
0 tests | GPT-5.4 speed / latency N/A / N/A input / output No data | Qwen3.5 Plus Thinking speed / latency N/A / N/A input / output No data |
GPT-5.4 gpt-5.4 speed / latency No data input / output $1.00/request | Qwen3.5 Plus Thinking qwen3.5-plus-thinking speed / latency No data input / output $1.00/request |
Weighted outcome: GPT-5.4. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
| Features | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning | None listed |
|---|
