Which is cheaper, Gemini 3.8 Flash and Nemotron 3 Ultra 550B A55B?

Nemotron 3 Ultra 550B A55B has the lowest input price. Per 1M input tokens: Gemini 3.8 Flash from $0.75 and Nemotron 3 Ultra 550B A55B from $0.50.

Which has the larger context window, Gemini 3.8 Flash and Nemotron 3 Ultra 550B A55B?

Gemini 3.8 Flash has the largest context window: Gemini 3.8 Flash 1,048,576 tokens and Nemotron 3 Ultra 550B A55B 262,144 tokens.

Which is smarter, Gemini 3.8 Flash and Nemotron 3 Ultra 550B A55B?

Gemini 3.8 Flash scores highest on the Artificial Analysis Intelligence Index: Gemini 3.8 Flash 30.8 and Nemotron 3 Ultra 550B A55B 11.8.

Can I switch between Gemini 3.8 Flash 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 (google/gemini-3.8-flash, nvidia/nemotron-3-ultra-550b-a55b).

Gemini 3.8 Flash 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

Gemini 3.8 Flash Googlegoogle/gemini-3.8-flash

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

Creator

Google

NVIDIA

Released

Sep 2, 2026

May 16, 2026

Context window

1.05M

262K

Max output

66K

16K

Input / 1MLowest provider price

$0.75

$0.50

Output / 1MLowest provider price

$3.75

$2.20

Providers

IntelligenceArtificial Analysis index

30.8

11.8

Accepts

Text, Image, Audio, Video, Files

Text

Produces

Text

Tool calling

Yes

Structured output

Yes

Reasoning

Yes

Gemini 3.8 Flash vs Nemotron 3 Ultra 550B A55B: summary

Gemini 3.8 Flash 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.

Gemini 3.8 Flash, from Google, has a 1,048,576-token context window, costs from $0.75/1M input and $3.75/1M output tokens across 2 providers and scores 30.8 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, 1.5× cheaper than the next model, Gemini 3.8 Flash has the largest context window and Gemini 3.8 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="google/gemini-3.8-flash", messages=[...]) # or client.chat.completions.create(model="nvidia/nemotron-3-ultra-550b-a55b", messages=[...])

Full API docs

Frequently asked questions

More comparisons

Benchmark scores sourced from ArtificialAnalysis