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Model comparison · Updated 10 Oct 2026

DeepSeek V4 Flash 0731 vs Nemotron 3.5 Lightning (free)

Nemotron 3.5 Lightning (free) is about 1.2× cheaper on input ($0.07 against $0.08 per 1M tokens), though DeepSeek V4 Flash 0731 is cheaper on output. DeepSeek V4 Flash 0731 has the larger context window (1.05M against 1M tokens). For a support chatbot at 10,000 chats a day, the standard-tier bill is about $52.04 a month for DeepSeek V4 Flash 0731 and $49.50 for Nemotron 3.5 Lightning (free).

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ModelsAtlas. “DeepSeek V4 Flash 0731 vs Nemotron 3.5 Lightning (free)”. Retrieved 10 Oct 2026. https://modelsatlas.com/compare/deepseek/v4/vs/nvidia/nemotron-3-5-lightning

Model A

DeepSeek V4 Flash 0731

by DeepSeek · weights not marked open · GRIDB5

Input / 1M
$0.08
observed We measured
Source
Our catalogue
Retrieved
10 Oct 2026
Output / 1M$0.17
Context1.05M
vs

Model B

Nemotron 3.5 Lightning (free)

by NVIDIA · weights not marked open · GRIDB5

Input / 1M
$0.07
observed We measured
Source
Our catalogue
Retrieved
10 Oct 2026
Output / 1M$0.20
Context1M

Key numbers

Standard tier · highlighted = better

DeepSeek V4 Flash 0731
Nemotron 3.5 Lightning (free)
Input / 1M tokens
$0.08
$0.07
Output / 1M tokens
$0.17
$0.20
Batch input / output
Not listed
Not listed
Context window
1,048,576
1,000,000
Input types
Not disclosed
Not disclosed
Weights
Not marked open
Not marked open
Tiers listed
standard
free, standard
Prices checked
2026-10-10
2026-10-10

What it costs for real workloads

Monthly, standard tier, 30 days

Support chatbot10k chats/day · 1.5k in, 300 out
$52.04/mo
$49.50/mo
RAG over documents2k queries/day · 12k in, 500 out
$64.43/mo
$56.40/mo
Coding agent300 tasks/day · 60k in, 8k out
$56.50/mo
$52.20/mo

DeepSeek V4 Flash 0731   Nemotron 3.5 Lightning (free) · Derived from the standard-tier prices above, input and output tokens per request as stated, 30 days. Excludes caching discounts and batch. Try your own numbers.

On the atlas

Price band (A–H) × context band (1–6)

Same square. DeepSeek V4 Flash 0731 and Nemotron 3.5 Lightning (free) share B5.

Same square as DeepSeek V4 Flash 0731: Qwen3.7 Flash ($0.03), Qwen3.5-Flash ($0.07). Open B5

AFreeB<$0.10C$0.10–0.30D$0.30–1E$1–3F$3–10G$10–30H$30+1<32K232–128K3128–256K4256K–1M51M6>1MINPUT PRICE PER 1M TOKENS →CONTEXT WINDOW ↑ · position within a square follows the real valueQwen3.5-Flash · B5Qwen3.7 Flash · B5Nemotron 3 Super · B4Qwen3.5-35B-A3B · B4Gemma 4 31B · B4Qwen3 Coder 30B A3B Instruct · B4Gemma 4 26B A4B · B4DeepSeek V4 Flash 0731DeepSeek V4 Flash 0731Nemotron 3.5 Lightning (free)Nemotron 3.5 Lightning (free)
DeepSeek V4 Flash 0731Nemotron 3.5 Lightning (free)Nearest neighboursOpen weights
View the map as a table (2 squares)
SquarePrice bandContext bandModels
GRIDB4<$0.10256K–1MNemotron 3 Super, Qwen3.5-35B-A3B, Gemma 4 31B, Qwen3 Coder 30B A3B Instruct, Gemma 4 26B A4B
GRIDB5<$0.101MDeepSeek V4 Flash 0731, Nemotron 3.5 Lightning (free), Qwen3.5-Flash, Qwen3.7 Flash

Capabilities side by side

Only what our records list

DeepSeek V4 Flash 0731
Nemotron 3.5 Lightning (free)
Vision input
Not disclosed
Not disclosed
Audio input
Not disclosed
Not disclosed
Open weights
Not marked open
Not marked open
Batch tier
Not listed
Not listed
Free tier
Not listed
Supported
Thinking tier
Not listed
Not listed

Neither record lists input types, so we do not claim any.

Which should you choose?

Editorial

Choose DeepSeek V4 Flash 0731 if…

  • output dominates your bill: $0.17 per 1M output against $0.20
  • your prompts are long: it takes 1,048,576 tokens against 1,000,000

Choose Nemotron 3.5 Lightning (free) if…

  • you pay by the token: it costs $0.07 per 1M input against $0.08
  • you want to try it free: it lists a free tier

Each reason is a fact from the tables above. Picking between them is our judgement, and we do not benchmark quality: price and context are what we can measure, so test both on your own prompts before you commit.

Questions

Is DeepSeek V4 Flash 0731 better than Nemotron 3.5 Lightning (free)?
We do not benchmark quality, so we cannot say. On the recorded numbers: Nemotron 3.5 Lightning (free) is about 1.2× cheaper on input ($0.07 against $0.08 per 1M tokens), though DeepSeek V4 Flash 0731 is cheaper on output. DeepSeek V4 Flash 0731 has the larger context window (1.05M against 1M tokens). For a support chatbot at 10,000 chats a day, the standard-tier bill is about $52.04 a month for DeepSeek V4 Flash 0731 and $49.50 for Nemotron 3.5 Lightning (free). Which is better for you depends on your task; test both on your own prompts.
Which is cheaper, DeepSeek V4 Flash 0731 or Nemotron 3.5 Lightning (free)?
Nemotron 3.5 Lightning (free): $0.07 against $0.08 per 1M input tokens, and $0.20 against $0.17 per 1M output, on standard pricing.
How much does each cost per 1M tokens?
DeepSeek V4 Flash 0731: $0.08 input and $0.17 output. Nemotron 3.5 Lightning (free): $0.07 input and $0.20 output. Standard tier, USD.
Which has the larger context window?
DeepSeek V4 Flash 0731, with 1,048,576 tokens. Nemotron 3.5 Lightning (free) has 1,000,000 tokens.
Do both offer batch pricing?
Neither lists a batch tier in our catalogue.
Can both read images or audio?
Input types recorded for DeepSeek V4 Flash 0731: none recorded. For Nemotron 3.5 Lightning (free): none recorded. Where a record lists none we say so rather than guess; check each vendor's documentation before relying on a capability.
Is either model open-weight?
DeepSeek V4 Flash 0731: not marked open-weight in our records. Nemotron 3.5 Lightning (free): not marked open-weight in our records.
Is either model free?
DeepSeek V4 Flash 0731 is not listed at no per-token charge; Nemotron 3.5 Lightning (free) is. Read the provider's limits before relying on a free offer.
What would each cost for a support chatbot?
At 10,000 chats a day, 1,500 input and 300 output tokens each, 30 days, standard tier: about $52.04 a month for DeepSeek V4 Flash 0731 and $49.50 for Nemotron 3.5 Lightning (free). This is our calculation from the listed prices, not a quote.

About the two models

DeepSeek V4 Flash 0731

By DeepSeek. $0.08 input and $0.17 output per 1M tokens, 1.05M context, atlas square B5. Tiers listed: standard.

Full specs & pricing →

Nemotron 3.5 Lightning (free)

By NVIDIA. $0.07 input and $0.20 output per 1M tokens, 1M context, atlas square B5. Tiers listed: free, standard.

Full specs & pricing →

Compare DeepSeek V4 Flash 0731 with…

Compare Nemotron 3.5 Lightning (free) with…

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