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Data points: 63

On this page

Key TakeawaysComparison sheetBenchmark score comparisonAPI audit comparisonProvider examplesWhen to choose each modelFAQRelated compare reports

Key Takeaways

The readout for GPT-5.2 and Qwen3.5 Flash, before the detailed comparison sheet.

Decision read

GPT-5.2

GPT-5.2 currently has the stronger profile, with verified wins split 4 to 2.

Evidence depth

63 data points

Includes 0 benchmark rows, 0 audit samples, and 8 provider examples.

Selection signal

Start with GPT-5.2

The charts below split 8 high-signal samples across speed, scores, and audit health.

Model compare

GPT-5.2 vs Qwen3.5 Flash

gpt-5-2-vs-qwen3-5-flash

Model A

OpenAI

GPT-5.2

Model B

Qwen

Qwen3.5 Flash

Overall leaderLeadingContender
Verified metric wins4 wins2 wins
Where it leadsCheapest input price, First-token latency, Provider coverage, Recent testsAverage speed, Free providers
Model metadataGPT-5.2 exposes 128K 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.
DeveloperOpenAINo data
Context window128K tokens1M tokens
Max output16.4K tokens65.5K tokens
ReleasedDec 2025Feb 2026
Modalities

Input

FileImageText

Output

Text

Input

TextImagevideo

Output

Text
Features
Text inputImage inputFile inputText outputTool callingStructured outputsJSON mode
Text inputImage inputText outputTool callingStructured outputsJSON modeReasoning
ParametersNo dataNo data
TokenizerGPTQwen3
Knowledge cutoffNo dataNo data
OpenRouter IDopenai/gpt-5.2-chatqwen/qwen3.5-flash-02-23
ReferencesNo dataNo data

Benchmark score comparison

Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.

Metric
OpenAIGPT-5.2
QwenQwen3.5 Flash
No shared benchmark metrics are available yet.

API audit comparison

Latest completed audits from shared providers, with four safety and integrity score groups plus report links.

Provider
OpenAIGPT-5.2
QwenQwen3.5 Flash
No completed audits are available from shared providers yet.

Provider examples

Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.

Provider
OpenAIGPT-5.2
QwenQwen3.5 Flash
PackyAPI10 tests
OpenAI

GPT-5.2

speed / latency

94 tok/s / 11492ms

input / output

No data

Qwen

Qwen3.5 Flash

speed / latency

N/A / N/A

input / output

No data

VSLLM5 tests
OpenAI

GPT-5.2

speed / latency

N/A / N/A

input / output

No data

Qwen

Qwen3.5 Flash

speed / latency

99 tok/s / 8545ms

input / output

No data

Yun API5 tests
OpenAI

GPT-5.2

gpt-5.2

speed / latency

32 tok/s / 1965ms

input / output

$0.0027/M / $0.0027/M

Qwen

Qwen3.5 Flash

qwen3.5-flash

speed / latency

N/A / N/A

input / output

$0.027/M / $0.274/M

小水管 API5 tests
OpenAI

GPT-5.2

speed / latency

71 tok/s / 2893ms

input / output

No data

Qwen

Qwen3.5 Flash

speed / latency

N/A / N/A

input / output

No data

钠 API5 tests
OpenAI

GPT-5.2

speed / latency

60 tok/s / 3331ms

input / output

No data

Qwen

Qwen3.5 Flash

speed / latency

N/A / N/A

input / output

No data

DNSHE
OpenAI

GPT-5.2

gpt-5.2-openai-compact

speed / latency

No data

input / output

$75.00/M / $600.00/M

Qwen

Qwen3.5 Flash

qwen3.5-flash

speed / latency

No data

input / output

$0/M / $0/M

Zero API
OpenAI

GPT-5.2

gpt-5.2

speed / latency

No data

input / output

$0.120/M / $0.959/M

Qwen

Qwen3.5 Flash

qwen3.5-flash

speed / latency

No data

input / output

$0.012/M / $0.118/M

KFCV50
OpenAI

GPT-5.2

gpt-5.2

speed / latency

No data

input / output

$0.014/M / $0.014/M

Qwen

Qwen3.5 Flash

qwen3.5-flash

speed / latency

No data

input / output

$10.27/M / $10.27/M

When to choose each model

This report only uses LMSpeed data for GPT-5.2 and Qwen3.5 Flash: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.

Guidance
OpenAIGPT-5.2
QwenQwen3.5 Flash
When to choose each model

GPT-5.2

GPT-5.2 is stronger when you prioritize Cheapest input price, First-token latency, Provider coverage, Recent tests.

Qwen3.5 Flash

Qwen3.5 Flash is stronger when you prioritize Average speed, Free providers.

FAQ

TL;DR: GPT-5.2 leads across 63 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.

Why is this comparison indexable?
It has 6 verifiable comparison points, and both models have pricing or benchmark data.
Are missing metrics invented?
No. Metrics without LMSpeed data are omitted from this report.

Related compare reports

Continue from GPT-5.2 vs Qwen3.5 Flash into nearby model comparisons with enough verified LMSpeed data.

OpenAIGPT-5.2 vs GPT-5.46 verified data pointsClaudeClaude Opus 4.6 vs GPT-5.26 verified data pointsOpenAIGPT-5 vs GPT-5.26 verified data pointsGeminiGemini 2.5 Pro vs GPT-5.26 verified data points

Data as of Jun 13, 2026, 04:33 PM·Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.