GPT-5.4 mini vs Qwen3.5 Flash

Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.

Benchmark data for one or both models is coming soon. This page currently shows metadata and pricing where BenchLM has it, and score-level comparisons will populate as public benchmark results land.
Agentic
Coding
Multimodal & Grounded
Reasoning
Knowledge
Instruction Following
Multilingual
Mathematics

GPT-5.4 mini· Qwen3.5 Flash

Quick Verdict

Benchmark data for GPT-5.4 mini and Qwen3.5 Flash is coming soon on BenchLM.

BenchLM does not have sourced benchmark coverage for Qwen3.5 Flash yet. This comparison is currently limited to metadata such as context window, reasoning mode, and pricing where available.

Qwen3.5 Flash has the larger context window at 1M, compared with 400K for GPT-5.4 mini.

Operational tradeoffs

Price$0.75 / $4.50Pricing unavailable
Speed201 t/sN/A
TTFT3.85sN/A
Context400K1M

Decision framing

BenchLM keeps the benchmark table and the operator tradeoffs on the same page so a better score does not hide a materially slower, pricier, or smaller-context model.

Runtime metrics show N/A when BenchLM does not have a sourced snapshot for that exact model. The scoring rules and freshness policy are documented on the methodology page.

BenchmarkGPT-5.4 miniQwen3.5 Flash
Agentic
Terminal-Bench 2.060%
OSWorld-Verified72.1%
MCP Atlas57.7%
Toolathlon42.9%
tau2-bench93.4%
Coding
SWE-bench Pro54.4%
Multimodal & Grounded
MMMU-Pro76.6%
MMMU-Pro w/ Python78%
OmniDocBench 1.50.1263
Reasoning
MRCRv240.7%
MRCR v2 64K-128K47.7%
MRCR v2 128K-256K33.6%
Graphwalks BFS 128K76.3%
Graphwalks Parents 128K71.5%
Knowledge
GPQA88%
HLE41.5%
HLE w/o tools28.2%
Instruction Following
IFEval87.4%
Multilingual
Coming soon
Mathematics
MATH-50097.4%
Frequently Asked Questions (3)

Can I compare GPT-5.4 mini and Qwen3.5 Flash on BenchLM yet?

Not fully yet. BenchLM is tracking both models, but the sourced benchmark breakdown for this comparison is still coming soon.

Why does this comparison show “coming soon”?

BenchLM only shows category winners and benchmark-level calls when we have sourced results that can be compared fairly. For these models, the public benchmark coverage is not complete enough yet.

What data is available for GPT-5.4 mini and Qwen3.5 Flash today?

GPT-5.4 mini: $0.75 input / $4.50 output per 1M tokens Qwen3.5 Flash: Pricing unavailable Both model pages still include creator, context window, reasoning mode, and other metadata while benchmark coverage fills in.

Last updated: March 31, 2026

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