Which is cheaper, DeepSeek V4 Pro and Inkling Small?

Inkling Small has the lowest input price. Per 1M input tokens: DeepSeek V4 Pro from $1.30 and Inkling Small from $0.45.

Which has the larger context window, DeepSeek V4 Pro and Inkling Small?

DeepSeek V4 Pro has the largest context window: DeepSeek V4 Pro 1,048,576 tokens and Inkling Small 524,288 tokens.

Which is smarter, DeepSeek V4 Pro and Inkling Small?

DeepSeek V4 Pro scores highest on the Artificial Analysis Intelligence Index: DeepSeek V4 Pro 23.1 and Inkling Small 12.9.

Can I switch between DeepSeek V4 Pro and Inkling Small 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, thinkingmachines/inkling-small).

DeepSeek V4 Pro vs Inkling Small

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

Inkling Small Thinking Machinesthinkingmachines/inkling-small

Creator

DeepSeek

Thinking Machines

Released

Apr 24, 2026

Jul 30, 2026

Context window

1.05M

524K

Max output

384K

262K

Input / 1MLowest provider price

$1.30$1.30–$2.40 across 4

$0.45

Output / 1MLowest provider price

$2.60$2.60–$4.80 across 4

$1.20

Providers

IntelligenceArtificial Analysis index

23.1

12.9

LatencyMedian time to first token

4.9s

—

ThroughputMedian tokens per second

<1 t/s

—

Accepts

Text

Text, Image, Audio

Produces

Text

Tool calling

Yes

Structured output

Yes

Reasoning

Yes

DeepSeek V4 Pro vs Inkling Small: summary

DeepSeek V4 Pro and Inkling Small 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 4 providers and scores 23.1 on the Artificial Analysis Intelligence Index.

Inkling Small, from Thinking Machines, has a 524,288-token context window, costs $0.45/1M input and $1.20/1M output tokens and scores 12.9 on the Artificial Analysis Intelligence Index.

Inkling Small is the cheapest on input, 2.9× cheaper than the next model, DeepSeek V4 Pro has the largest context window and DeepSeek V4 Pro 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="thinkingmachines/inkling-small", messages=[...])

Full API docs

Frequently asked questions

More comparisons

Benchmark scores sourced from ArtificialAnalysis