Which has the larger context window?

GPT-4o accepts 128K tokens and Qwen3.5 4B 262K tokens.

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GPT-4o vs Qwen3.5 4B

Qwen3.5 4B scores 14.2 on the Respan Index (#128), ahead of GPT-4o at 13.9 (#130). Qwen3.5 4B leads on 2 of the 2 benchmarks both report. Qwen3.5 4B has the larger context window (262K tokens).

GPT-4oOpenAI

Respan Index: 13.9 (#130)
Input / output per 1M: $2.5 / $10
Blended price per 1M: $4.38
Context window: 128K
Max output: 16K
Input: text, vision
Released: 2024-05-13

Prices and providers on Respan

Respan Index by category

Coding2.2 GPT-4o1.9 Qwen3.5 4B
Agents10.9 GPT-4o14.4 Qwen3.5 4B
Reasoning9.6 GPT-4o11.7

Benchmarks both report

Benchmark	GPT-4o	Qwen3.5 4B
GPQA Diamond	46%	76.2%
OTIS Mock AIME 2024-2025 (Epoch AI)	6.4%	55.8%

Higher is better. Each score links to where it was published.

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GPT-4o vs Qwen3.5 4B: benchmarks, price and context | Respan

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Respan Index by category

Benchmarks both report

FAQ

Is GPT-4o better than Qwen3.5 4B?

Which has the larger context window?

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