Which is cheaper, DeepSeek V4.1 Flash 1017 and Nemotron 3 Ultra 550B A55B?

DeepSeek V4.1 Flash 1017 has the lowest input price. Per 1M input tokens: DeepSeek V4.1 Flash 1017 from $0.10 and Nemotron 3 Ultra 550B A55B from $0.50.

Which has the larger context window, DeepSeek V4.1 Flash 1017 and Nemotron 3 Ultra 550B A55B?

DeepSeek V4.1 Flash 1017 has the largest context window: DeepSeek V4.1 Flash 1017 1,048,576 tokens and Nemotron 3 Ultra 550B A55B 262,144 tokens.

DeepSeek V4.1 Flash 1017 vs Nemotron 3 Ultra 550B A55B

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 V4.1 Flash 1017 DeepSeekdeepseek/deepseek-v4.1-flash-1017

Nemotron 3 Ultra 550B A55B NVIDIAnvidia/nemotron-3-ultra-550b-a55b

Creator

DeepSeek

NVIDIA

Released

Oct 17, 2026

May 16, 2026

Context window

1.05M

262K

Max output

944K

16K

Input / 1MLowest provider price

$0.10$0.10–$0.30 across 4

$0.50

Output / 1MLowest provider price

$0.29$0.29–$1.20 across 4

$2.20

Providers

IntelligenceArtificial Analysis index

32.6

11.8

Accepts

Text, Image

Text

Produces

Text

Tool calling

Yes

Structured output

Yes

Reasoning

Yes

DeepSeek V4.1 Flash 1017 vs Nemotron 3 Ultra 550B A55B: summary

DeepSeek V4.1 Flash 1017 and Nemotron 3 Ultra 550B A55B are both available through FastRouter's OpenAI-compatible API, so switching between them is a change of model id, not a new integration.

DeepSeek V4.1 Flash 1017, from DeepSeek, has a 1,048,576-token context window, costs from $0.10/1M input and $0.29/1M output tokens across 4 providers and scores 32.6 on the Artificial Analysis Intelligence Index.

Nemotron 3 Ultra 550B A55B, from NVIDIA, has a 262,144-token context window, costs $0.50/1M input and $2.20/1M output tokens and scores 11.8 on the Artificial Analysis Intelligence Index.

DeepSeek V4.1 Flash 1017 is the cheapest on input, 5× cheaper than the next model, DeepSeek V4.1 Flash 1017 has the largest context window and DeepSeek V4.1 Flash 1017 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-v4.1-flash-1017", messages=[...]) # or client.chat.completions.create(model="nvidia/nemotron-3-ultra-550b-a55b", messages=[...])

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Benchmark scores sourced from ArtificialAnalysis