Which is cheaper, DeepSeek V4 Pro and Ling 3.1 Flash?

Ling 3.1 Flash has the lowest input price. Per 1M input tokens: DeepSeek V4 Pro from $1.30 and Ling 3.1 Flash from $0.07.

Which has the larger context window, DeepSeek V4 Pro and Ling 3.1 Flash?

DeepSeek V4 Pro has the largest context window: DeepSeek V4 Pro 1,048,576 tokens and Ling 3.1 Flash 262,144 tokens.

Which is smarter, DeepSeek V4 Pro and Ling 3.1 Flash?

Ling 3.1 Flash scores highest on the Artificial Analysis Intelligence Index: DeepSeek V4 Pro 23.1 and Ling 3.1 Flash 29.6.

Can I switch between DeepSeek V4 Pro and Ling 3.1 Flash without changing my code?

Yes. All of them are served through FastRouter's OpenAI-compatible API, so switching is a change of the model parameter (deepseek/deepseek-v4-pro, inclusionai/ling-3.1-flash).

DeepSeek V4 Pro vs Ling 3.1 Flash

Side-by-side pricing per provider, context window, benchmark scores and speed, all on one OpenAI-compatible API.

Estimate monthly cost for these models

DeepSeek V4 Pro DeepSeekdeepseek/deepseek-v4-pro

Ling 3.1 Flash inclusionAIinclusionai/ling-3.1-flash

Creator

DeepSeek

inclusionAI

Released

Apr 24, 2026

Oct 2, 2026

Context window

1.05M

262K

Input / 1MLowest provider price

$1.30$1.30–$2.40 across 3

$0.07

Output / 1MLowest provider price

$2.60$2.60–$4.80 across 3

$0.22

Providers

IntelligenceArtificial Analysis index

23.1

29.6

LatencyMedian time to first token

2.7s

—

ThroughputMedian tokens per second

<1 t/s

—

Accepts

Text

Produces

Text

Tool calling

Yes

Structured output

Yes

Reasoning

Yes

DeepSeek V4 Pro vs Ling 3.1 Flash: summary

DeepSeek V4 Pro and Ling 3.1 Flash are both available through FastRouter's OpenAI-compatible API, so switching between them is a change of model id, not a new integration.

DeepSeek V4 Pro, from DeepSeek, has a 1,048,576-token context window, costs from $1.30/1M input and $2.60/1M output tokens across 3 providers and scores 23.1 on the Artificial Analysis Intelligence Index.

Ling 3.1 Flash, from inclusionAI, has a 262,144-token context window, costs $0.07/1M input and $0.22/1M output tokens and scores 29.6 on the Artificial Analysis Intelligence Index.

Ling 3.1 Flash is the cheapest on input, 19× cheaper than the next model, DeepSeek V4 Pro has the largest context window and Ling 3.1 Flash scores highest for intelligence.

Switch with one line

client = OpenAI(base_url="https://api.fastrouter.ai/api/v1", api_key="<FASTROUTER_API_KEY>") client.chat.completions.create(model="deepseek/deepseek-v4-pro", messages=[...]) # or client.chat.completions.create(model="inclusionai/ling-3.1-flash", messages=[...])

Full API docs

Frequently asked questions

More comparisons

Benchmark scores sourced from ArtificialAnalysis