Which is cheaper, DeepSeek V4 Pro and Nemotron 3 Ultra 550B A55B?

Nemotron 3 Ultra 550B A55B has the lowest input price. Per 1M input tokens: DeepSeek V4 Pro from $1.30 and Nemotron 3 Ultra 550B A55B from $0.50.

Which has the larger context window, DeepSeek V4 Pro and Nemotron 3 Ultra 550B A55B?

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

Which is smarter, DeepSeek V4 Pro and Nemotron 3 Ultra 550B A55B?

DeepSeek V4 Pro scores highest on the Artificial Analysis Intelligence Index: DeepSeek V4 Pro 23.1 and Nemotron 3 Ultra 550B A55B 11.8.

Can I switch between DeepSeek V4 Pro and Nemotron 3 Ultra 550B A55B 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, nvidia/nemotron-3-ultra-550b-a55b).

DeepSeek V4 Pro 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 Pro DeepSeekdeepseek/deepseek-v4-pro

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

Creator

DeepSeek

NVIDIA

Released

Apr 24, 2026

May 16, 2026

Context window

1.05M

262K

Max output

384K

16K

Input / 1MLowest provider price

$1.30$1.30–$2.40 across 4

$0.50

Output / 1MLowest provider price

$2.60$2.60–$4.80 across 4

$2.20

Providers

IntelligenceArtificial Analysis index

23.1

11.8

LatencyMedian time to first token

4.9s

—

ThroughputMedian tokens per second

<1 t/s

—

Accepts

Text

Produces

Text

Tool calling

Yes

Structured output

Yes

Reasoning

Yes

DeepSeek V4 Pro vs Nemotron 3 Ultra 550B A55B: summary

DeepSeek V4 Pro 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 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.

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.

Nemotron 3 Ultra 550B A55B is the cheapest on input, 2.6× 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="nvidia/nemotron-3-ultra-550b-a55b", messages=[...])

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Benchmark scores sourced from ArtificialAnalysis