Name: Qwen/Qwen3.5-9B
Author: Qwen

Question 1

What does this Qwen/Qwen3.5-9B vs GPT-5.1 Codex Max comparison cover?

Accepted Answer

It brings together documented inputs and outputs, token limits, deployment terms and available pricing. When both models have source-linked, verified results on a shared benchmark, those results are shown with their individual sources. The comparison is a starting point for evaluating your own workload.

Question 2

Which is cheaper: Qwen/Qwen3.5-9B or GPT-5.1 Codex Max?

Accepted Answer

Qwen/Qwen3.5-9B lists $0.04 input and $0.15 output per 1M tokens. GPT-5.1 Codex Max lists $1.25 input and $10.00 output. The cheaper workload depends on the mix of input and output. Long-context tiers, caching, batch processing and retries can change the bill.

Question 3

Which has the larger context window: Qwen/Qwen3.5-9B or GPT-5.1 Codex Max?

Accepted Answer

Qwen/Qwen3.5-9B lists 262.14K tokens and GPT-5.1 Codex Max lists 400K. GPT-5.1 Codex Max therefore has the larger recorded context window, but capacity alone is not a quality score.

Question 4

Which is faster: Qwen/Qwen3.5-9B or GPT-5.1 Codex Max?

Accepted Answer

There is no matched speed measurement for both models with the same source, host, region and date. Test the same prompts at your expected concurrency and measure time to the first useful response as well as complete task time.

Question 5

What input and output types do Qwen/Qwen3.5-9B and GPT-5.1 Codex Max support?

Accepted Answer

Qwen/Qwen3.5-9B records image, text input and text output. GPT-5.1 Codex Max records text, image input and text output. “Not documented” means the current source record is incomplete; it does not prove that a modality is unsupported.

Question 6

Should I choose Qwen/Qwen3.5-9B or GPT-5.1 Codex Max?

Accepted Answer

Consider Qwen/Qwen3.5-9B if you need larger maximum output or a lower listed input rate or a lower listed output rate. Consider GPT-5.1 Codex Max if you need larger context. Qwen/Qwen3.5-9B offers downloadable weights; GPT-5.1 Codex Max is listed as a proprietary model. Compare licence terms and operating costs before choosing a deployment. Test both on the same representative examples and judge the output against your acceptance criteria. Include tool failures, retries and the time to a completed task.

Specification	Qwen/Qwen3.5-9B	GPT-5.1 Codex Max
Provider	Qwen	OpenAI
Listed pricing route	Qwen	OpenAI
Model family	—	gpt-codex
Accepted inputs	image, text	text, image
Produced outputs	text	text
Context window	262.14K	400KHigher
Max output	262.14KHigher	128K
Input price / 1M	$0.04Lower	$1.25
Output price / 1M	$0.15Lower	$10.00
Reasoning mode	Documented	Documented
Tool calling	Documented	Documented
Image input	Documented	Documented
Audio input	Not documented	Not documented
Structured output	Not documented	Documented
License	Not documented	Proprietary

Qwen/Qwen3.5-9B vs GPT-5.1 Codex Max

Qwen/Qwen3.5-9B

GPT-5.1 Codex Max

Key differences

Pricing, limits and capabilities

Which model should you choose?

Documentation and model profiles

Questions people ask

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