Model comparison

DeepSeek V4.1 Flash 1017 vs GPT-5.4

DeepSeek's DeepSeek V4.1 Flash 1017 against OpenAI's GPT-5.4: vendor list prices, limits, abilities and the Artificial Analysis indexes side by side - and what OpenSmartRoute does when both are available.

CheaperDeepSeek V4.1 Flash 1017

DeepSeek V4.1 Flash 1017 lists at $0.262 per million tokens blended against $5.63 for GPT-5.4 - 21x less.

Intelligence: levelEven

Intelligence index 40 against 39: within a point of each other.

Longer contextGPT-5.4

GPT-5.4 reads 1.1M tokens at once, DeepSeek V4.1 Flash 1017 1.0M.

Abilities differDeepSeek V4.1 Flash 1017

only DeepSeek V4.1 Flash 1017 offers open weights.

NewerDeepSeek V4.1 Flash 1017

DeepSeek V4.1 Flash 1017 was released about 8 months later.

Side by side

Vendor list prices per million tokens and published limits; indexes are Artificial Analysis composites (0-100).

Specification	DeepSeek V4.1 Flash 1017	GPT-5.4
Input price / 1M tokens	$0.15	$2.50
Output price / 1M tokens	$0.60	$15.0
Blended (3 in : 1 out)	$0.26	$5.63
Cached input / 1M	$0.003	$0.25
Context window	1.0M	1.1M
Max output	393K	128K
Input	text, image	text, image, file
Output	text	text
Tool calls
Structured output
Reasoning
Open weights
Intelligence index	40	39
Coding index	-	71
Agentic index	-	-
Released	Oct 17, 2026	Mar 5, 2026
Available on this deployment

What a month costs

List price times tokens for three typical workloads; your mix of input and output decides which model's pricing suits you.

Workload	DeepSeek V4.1 Flash 1017	GPT-5.4	Difference
Support chat20M tokens in, 5M out a month - a help desk answering a few thousand conversations.	$6.00	$125	$119 less on DeepSeek V4.1 Flash 1017
Document summaries100M in, 5M out - long inputs, short answers.	$18.00	$325	$307 less on DeepSeek V4.1 Flash 1017
Coding assistant60M in, 20M out - a team's editor assistant, output-heavy.	$21.00	$450	$429 less on DeepSeek V4.1 Flash 1017

What the router does with the pair

The two measure the same on the intelligence index, so the router treats them as peers and lets price, observed latency and your outcomes decide: DeepSeek V4.1 Flash 1017 wins on cost, and a few bad outcomes on either move the next requests to the other.

Price a request Playground

yaml

# targets.yaml - both models as routing targets (metadata.model links each to the catalogue entry)
targets:
  - { id: deepseek-v4.1-flash-1017, kind: llm, metadata: { model: deepseek/deepseek-v4.1-flash-1017 } }
  - { id: gpt-5.4, kind: llm, metadata: { model: openai/gpt-5.4 } }

# rules.yaml - the cheaper model by default, the stronger one when the request is hard
rules:
  - name: simple-requests-stay-cheap
    when: { max_complexity: 0.45 }
    prefer: [deepseek-v4.1-flash-1017]
    weight: 0.8
  - name: hard-requests-escalate
    when: { min_complexity: 0.45 }
    prefer: [gpt-5.4]
    weight: 0.8

Frequently asked

Is DeepSeek V4.1 Flash 1017 cheaper than GPT-5.4?: Yes. DeepSeek V4.1 Flash 1017 lists at $0.15 in / $0.60 out per million tokens, GPT-5.4 at $2.50 in / $15.0 out; blended, DeepSeek V4.1 Flash 1017 is the cheaper one.
Which is better, DeepSeek V4.1 Flash 1017 or GPT-5.4?: On the Artificial Analysis intelligence index DeepSeek V4.1 Flash 1017 scores higher (40 against 39). "Better" depends on the task: the coding and agentic indexes below and the abilities row may point the other way for your requests.
Which has the longer context window?: GPT-5.4 - 1.1M tokens against 1.0M.
Can I use DeepSeek V4.1 Flash 1017 and GPT-5.4 together?: Yes. Declare both as targets and OpenSmartRoute picks one per request on quality for the task, price and your rules - the cheaper model for the requests it can answer, the stronger one for the rest - and records why in the trace.

Also compared

Every DeepSeek and OpenAI model, with prices, is on the vendor pages; the rankings show what the router actually picks.

For the business

What it means for which models you pay for.

Catalogue of every vendor
The right model, not the famous one
Price, context, abilities and benchmark indexes side by side, with the model that fits each task named.
The rankings
89% less
Lower cost per request
On the 150-prompt benchmark the router spent 89% less than sending every prompt to the reference model, and the judged quality went up, not down.
Read the benchmark
Per million tokens, every model
Prices you can compare
The catalogue prints input and output prices and what three typical monthly workloads cost on each.
The model catalogue

Which LLM is the cheapest for our workload?: The best-for pages rank the live catalogue per task by the index that measures it, and the router picks the cheapest model that meets your quality rule for each request.
How much can we save on our LLM bill?: On the public benchmark the router saved 89% against sending everything to the reference model. Import last month's provider bill on the bill page and the estimate is computed on your own traffic before you change a line of code.
How often do model prices change?: The catalogue is refreshed from the vendors' price lists; each model page shows the date of its data.

Stop choosing between DeepSeek V4.1 Flash 1017 and GPT-5.4. Route to both.

Declare the pair as targets and OpenSmartRoute picks per request - the cheaper one where it holds up, the stronger one where it matters - with the comparison in every trace.

Create a free account Try a request

Free plan, no card. Fifteen thousand decisions a month with the full trace.

Specification

DeepSeek V4.1 Flash 1017

GPT-5.4

Input price / 1M tokens

$0.15

$2.50

Output price / 1M tokens

$0.60

$15.0

Blended (3 in : 1 out)

$0.26

$5.63

Cached input / 1M

$0.003

$0.25

Context window

1.0M

1.1M

Max output

393K

128K

Input

text, image

text, image, file

Output

text

Tool calls

Structured output

Reasoning

Open weights

Intelligence index

Coding index

Agentic index

Released

Oct 17, 2026

Mar 5, 2026

Available on this deployment

Workload

DeepSeek V4.1 Flash 1017

GPT-5.4

Difference

Support chat20M tokens in, 5M out a month - a help desk answering a few thousand conversations.

$6.00

$125

$119 less on DeepSeek V4.1 Flash 1017

Document summaries100M in, 5M out - long inputs, short answers.

$18.00

$325

$307 less on DeepSeek V4.1 Flash 1017

Coding assistant60M in, 20M out - a team's editor assistant, output-heavy.

$21.00

$450

$429 less on DeepSeek V4.1 Flash 1017

# targets.yaml - both models as routing targets (metadata.model links each to the catalogue entry) targets: - { id: deepseek-v4.1-flash-1017, kind: llm, metadata: { model: deepseek/deepseek-v4.1-flash-1017 } } - { id: gpt-5.4, kind: llm, metadata: { model: openai/gpt-5.4 } } # rules.yaml - the cheaper model by default, the stronger one when the request is hard rules: - name: simple-requests-stay-cheap when: { max_complexity: 0.45 } prefer: [deepseek-v4.1-flash-1017] weight: 0.8 - name: hard-requests-escalate when: { min_complexity: 0.45 } prefer: [gpt-5.4] weight: 0.8

Frequently asked

Is DeepSeek V4.1 Flash 1017 cheaper than GPT-5.4?

Yes. DeepSeek V4.1 Flash 1017 lists at $0.15 in / $0.60 out per million tokens, GPT-5.4 at $2.50 in / $15.0 out; blended, DeepSeek V4.1 Flash 1017 is the cheaper one.

Which is better, DeepSeek V4.1 Flash 1017 or GPT-5.4?

On the Artificial Analysis intelligence index DeepSeek V4.1 Flash 1017 scores higher (40 against 39). "Better" depends on the task: the coding and agentic indexes below and the abilities row may point the other way for your requests.

Which has the longer context window?

GPT-5.4 - 1.1M tokens against 1.0M.

Can I use DeepSeek V4.1 Flash 1017 and GPT-5.4 together?

Yes. Declare both as targets and OpenSmartRoute picks one per request on quality for the task, price and your rules - the cheaper model for the requests it can answer, the stronger one for the rest - and records why in the trace.

DeepSeek V4.1 Flash 1017 vs GPT-5.4

Side by side

What a month costs

What the router does with the pair

Frequently asked

Also compared

What it means for which models you pay for.

The right model, not the famous one

Lower cost per request

Prices you can compare

Stop choosing between DeepSeek V4.1 Flash 1017 and GPT-5.4. Route to both.

DeepSeek V4.1 Flash 1017 vs GPT-5.4

Side by side

What a month costs

What the router does with the pair

Frequently asked

Also compared

What it means for which models you pay for.

The right model, not the famous one

Lower cost per request

Prices you can compare

Stop choosing between DeepSeek V4.1 Flash 1017 and GPT-5.4. Route to both.