Data points: 63
The readout for GPT-5.4 and Qwen3.5 Flash, 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
63 data points
Includes 0 benchmark rows, 0 audit samples, and 7 provider examples.
Selection signal
Start with GPT-5.4
The charts below split 7 high-signal samples across speed, scores, and audit health.
Model compare GPT-5.4 vs Qwen3.5 Flashgpt-5-4-vs-qwen3-5-flash | Model A GPT-5.4 | Model B Qwen3.5 Flash |
|---|---|---|
| Overall leader | Leading | Contender |
| Verified metric wins | 5 wins | 1 wins |
| Where it leads | Cheapest input price, 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-5.4 | Qwen3.5 Flash |
|---|---|---|
| No shared benchmark metrics 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 Flash |
|---|---|---|
| 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 Flash |
|---|---|---|
10 tests | GPT-5.4 speed / latency 88 tok/s / 6075ms input / output No data |
This report only uses LMSpeed data for GPT-5.4 and Qwen3.5 Flash: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | GPT-5.4 | Qwen3.5 Flash |
|---|---|---|
| When to choose each model | GPT-5.4 GPT-5.4 is stronger when you prioritize Cheapest input price, First-token latency, Free providers, Provider coverage, Recent tests. | Qwen3.5 Flash Qwen3.5 Flash is stronger when you prioritize Average speed. |
TL;DR: GPT-5.4 leads across 63 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from GPT-5.4 vs Qwen3.5 Flash into nearby model comparisons with enough verified LMSpeed data.
| Average speed |
| Model metadata | GPT-5.4 exposes 1.1M tokens; notable signals: Text input, Image input, File input, Text output. | Qwen3.5 Flash exposes 1M tokens; notable signals: Text input, Image input, Text output, Tool calling. |
|---|---|---|
| Developer | OpenAI | No data |
| Context window | 1.1M tokens | 1M tokens |
| Max output | 128K tokens | 65.5K tokens |
| Released | Mar 2026 | Feb 2026 |
| Modalities | Input TextImageFile Output Text | Input TextImagevideo Output Text |
| Features | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputText outputTool callingStructured outputsJSON modeReasoning |
| Parameters | No data | No data |
| Tokenizer | GPT | Qwen3 |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | openai/gpt-5.4 | qwen/qwen3.5-flash-02-23 |
| References | No data | No data |
Qwen3.5 Flash
speed / latency
N/A / N/A
input / output
No data
Omini Api10 tests | GPT-5.4 gpt-5.4-openai-compact speed / latency 51 tok/s / 1443ms input / output $0.342/M / $2.05/M | Qwen3.5 Flash qwen3.5-flash speed / latency N/A / N/A input / output $0.024/M / $0.236/M |
|---|
VSLLM10 tests | GPT-5.4 speed / latency 60 tok/s / 2482ms input / output No data | Qwen3.5 Flash speed / latency 99 tok/s / 8545ms input / output No data |
|---|
6i2 API5 tests | GPT-5.4 speed / latency 428 tok/s / 4171ms input / output No data | Qwen3.5 Flash speed / latency N/A / N/A input / output No data |
|---|
AI Claw API5 tests | GPT-5.4 speed / latency N/A / N/A input / output No data | Qwen3.5 Flash speed / latency 136 tok/s / 3385ms input / output No data |
|---|
GPT-5.4 gpt-5.4-openai-compact speed / latency No data input / output $75.00/M / $450.00/M | Qwen3.5 Flash qwen3.5-flash speed / latency No data input / output $0/M / $0/M |
GPT-5.4 gpt-5.4 speed / latency No data input / output $0.171/M / $1.03/M | Qwen3.5 Flash qwen3.5-flash speed / latency No data input / output $0.012/M / $0.118/M |
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
