Name: deepseek-ai/DeepSeek-V4-Flash
Author: deepseek-ai

Question 1

What does this deepseek-ai/DeepSeek-V4-Flash vs GPT-5.1 Codex mini 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: deepseek-ai/DeepSeek-V4-Flash or GPT-5.1 Codex mini?

Accepted Answer

deepseek-ai/DeepSeek-V4-Flash lists $0.14 input and $0.28 output per 1M tokens. GPT-5.1 Codex mini lists $0.25 input and $2.00 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: deepseek-ai/DeepSeek-V4-Flash or GPT-5.1 Codex mini?

Accepted Answer

deepseek-ai/DeepSeek-V4-Flash lists 1M tokens and GPT-5.1 Codex mini lists 400K. deepseek-ai/DeepSeek-V4-Flash therefore has the larger recorded context window, but capacity alone is not a quality score.

Question 4

Which is faster: deepseek-ai/DeepSeek-V4-Flash or GPT-5.1 Codex mini?

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 deepseek-ai/DeepSeek-V4-Flash and GPT-5.1 Codex mini support?

Accepted Answer

deepseek-ai/DeepSeek-V4-Flash records text input and text output. GPT-5.1 Codex mini 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 deepseek-ai/DeepSeek-V4-Flash or GPT-5.1 Codex mini?

Accepted Answer

Consider deepseek-ai/DeepSeek-V4-Flash if you need larger context or larger maximum output or a lower listed input rate or a lower listed output rate. deepseek-ai/DeepSeek-V4-Flash offers downloadable weights; GPT-5.1 Codex mini 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	deepseek-ai/DeepSeek-V4-Flash	GPT-5.1 Codex mini
Provider	deepseek-ai	OpenAI
Listed pricing route	deepseek-ai	OpenAI
Model family	—	gpt-codex
Accepted inputs	text	text, image
Produced outputs	text	text
Context window	1MHigher	400K
Max output	384KHigher	128K
Input price / 1M	$0.14Lower	$0.25
Output price / 1M	$0.28Lower	$2.00
Reasoning mode	Documented	Documented
Tool calling	Documented	Documented
Image input	Not documented	Documented
Audio input	Not documented	Not documented
Structured output	Not documented	Documented
License	Not documented	Proprietary

deepseek-ai/DeepSeek-V4-Flash vs GPT-5.1 Codex mini

deepseek-ai/DeepSeek-V4-Flash

GPT-5.1 Codex mini

Key differences

Pricing, limits and capabilities

Which model should you choose?

Documentation and model profiles

Questions people ask

Compare a different pair