Catalog Changes · 2026-10-14 18:04:41.945654

NVIDIA: Nemotron 3 Ultra (free) · 2026-10-14 18:04:41.945654 UTC

OpenRouter

13 Changed Fields

Field / Array Position	Previous Value	Observed Value
Benchmarks · Design Arena[0] · Elo	1132	1130
Benchmarks · Design Arena[0] · Rank	74	75
Benchmarks · Design Arena[0] · Win Rate	39	38.9
Benchmarks · Design Arena[2] · Elo	1148	1147
Benchmarks · Design Arena[2] · Rank	83	84
Benchmarks · Design Arena[3] · Elo	1141	1142
Benchmarks · Design Arena[3] · Win Rate	37.3	37.4
Benchmarks · Design Arena[4] · Elo	1142	1140
Benchmarks · Design Arena[4] · Rank	77	78
Benchmarks · Design Arena[4] · Win Rate	36.3	36.2
Benchmarks · Design Arena[5] · Elo	1068	1069
Benchmarks · Design Arena[7] · Elo	1145	1144
Benchmarks · Design Arena[7] · Rank	91	92

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NVIDIA: Nemotron 3 Ultra (free)

nvidia/nemotron-3-ultra-550b-a55b:free

OpenRouter Catalog Changes

Last Observed: 2026-10-15 00:04:06.901076 UTC

NVIDIA Nemotron 3 Ultra is an open frontier-reasoning and orchestration model from NVIDIA, with 55B active parameters out of 550B total (MoE). Built on a hybrid Transformer-Mamba mixture-of-experts architecture, it...

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Architecture And Modalities · 3

Architecture · Instruct Type API Details /architecture/instruct_type Explicit Null	Explicit Null
Architecture · Modality API Details /architecture/modality text->text	text->text
Architecture · Tokenizer API Details /architecture/tokenizer Other	Other

Benchmarks · 3

Benchmarks · Artificial Analysis · Agentic Index API Details /benchmarks/artificial_analysis/agentic_index 20.1	20.1
Benchmarks · Artificial Analysis · Coding Index API Details /benchmarks/artificial_analysis/coding_index 49.3	49.3
Benchmarks · Artificial Analysis · Intelligence Index API Details /benchmarks/artificial_analysis/intelligence_index 22.9	22.9

Catalog Identity And Metadata · 11

Canonical Slug API Details /canonical_slug nvidia/nemotron-3-ultra-550b-a55b-20260604	nvidia/nemotron-3-ultra-550b-a55b-20260604
Context Tokens API Details /context_length 1000000	1,000,000
Created API Details /created 1780551208	2026-06-04 05:33:28 UTC
Description API Details /description NVIDIA Nemotron 3 Ultra is an open frontier-reasoning and orchestration model from NVIDIA, with 55B active parameters out of 550B total (MoE). Built on a hybrid Transformer-Mamba mixture-of-experts architecture, it...	NVIDIA Nemotron 3 Ultra is an open frontier-reasoning and orchestration model from NVIDIA, with 55B active parameters out of 550B total (MoE). Built on a hybrid Transformer-Mamba mixture-of-experts architecture, it...
Expiration Date API Details /expiration_date Explicit Null	Explicit Null
Hugging Face Id API Details /hugging_face_id nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B-BF16	nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B-BF16
Id API Details /id nvidia/nemotron-3-ultra-550b-a55b:free	nvidia/nemotron-3-ultra-550b-a55b:free
Knowledge Cutoff API Details /knowledge_cutoff Explicit Null	Explicit Null
Links · Details API Details /links/details /api/v1/models/nvidia/nemotron-3-ultra-550b-a55b-20260604/endpoints	/api/v1/models/nvidia/nemotron-3-ultra-550b-a55b-20260604/endpoints
Name API Details /name NVIDIA: Nemotron 3 Ultra (free)	NVIDIA: Nemotron 3 Ultra (free)
Supported Voices API Details /supported_voices Explicit Null	Explicit Null

Default Parameters · 6

Default Parameters · Frequency Penalty API Details /default_parameters/frequency_penalty Explicit Null	Explicit Null
Default Parameters · Presence Penalty API Details /default_parameters/presence_penalty Explicit Null	Explicit Null
Default Parameters · Repetition Penalty API Details /default_parameters/repetition_penalty Explicit Null	Explicit Null
Default Parameters · Temperature API Details /default_parameters/temperature 1	1
Default Parameters · Top K API Details /default_parameters/top_k Explicit Null	Explicit Null
Default Parameters · Top P API Details /default_parameters/top_p 0.95	0.95

Request Limits · 1

Per Request Limits API Details /per_request_limits Explicit Null	Explicit Null

Pricing · 2

Output Price · USD/Token API Details /pricing/completion 0	0
Input Price · USD/Token API Details /pricing/prompt 0	0

Reasoning · 4

Reasoning · Default Effort API Details /reasoning/default_effort high	high
Reasoning · Default Enabled API Details /reasoning/default_enabled True	True
Reasoning · Mandatory API Details /reasoning/mandatory False	False
Reasoning · Supports Max Tokens API Details /reasoning/supports_max_tokens True	True

Provider Limits · 3

Top Provider · Context Length API Details /top_provider/context_length 1000000	1,000,000
Top Provider · Is Moderated API Details /top_provider/is_moderated False	False
Top Provider · Max Completion Tokens API Details /top_provider/max_completion_tokens 65536	65,536

API Structure And Container Types

Architecture API Details /architecture Object · See Fields	Object · See Fields
Architecture · Input Modalities API Details /architecture/input_modalities Array · See Items	Array · See Items
Architecture · Output Modalities API Details /architecture/output_modalities Array · See Items	Array · See Items
Benchmarks API Details /benchmarks Object · See Fields	Object · See Fields
Benchmarks · Artificial Analysis API Details /benchmarks/artificial_analysis Object · See Fields	Object · See Fields
Benchmarks · Design Arena API Details /benchmarks/design_arena Array · See Items	Array · See Items
Default Parameters API Details /default_parameters Object · See Fields	Object · See Fields
Links API Details /links Object · See Fields	Object · See Fields
Pricing API Details /pricing Object · See Fields	Object · See Fields
Reasoning API Details /reasoning Object · See Fields	Object · See Fields
Reasoning · Supported Efforts API Details /reasoning/supported_efforts Array · See Items	Array · See Items
Supported Parameters API Details /supported_parameters Array · See Items	Array · See Items
Top Provider API Details /top_provider Object · See Fields	Object · See Fields

Architecture · Input Modalities

1 items · source order preserved

text

API Details

Item	/architecture/input_modalities/*
1	text

Architecture · Output Modalities

1 items · source order preserved

text

API Details

Item	/architecture/output_modalities/*
1	text

Supported Parameters

9 items · source order preserved

include_reasoning
max_tokens
reasoning
reasoning_effort
seed
temperature
tool_choice
tools
top_p

API Details

Item	/supported_parameters/*
1	include_reasoning
2	max_tokens
3	reasoning
4	reasoning_effort
5	seed
6	temperature
7	tool_choice
8	tools
9	top_p

Benchmarks · Design Arena

8 items · source order preserved

Item	Arena	Category	Elo	Rank	Win Rate
1	models	3d	1130	75	38.9
2	models	asciiart	1097	60	37.5
3	models	codecategories	1147	84	36
4	models	dataviz	1142	83	37.4
5	models	gamedev	1140	78	36.2
6	models	svg	1069	69	32.4
7	models	uicomponent	1142	78	36.2
8	models	website	1144	92	35

API Details

Item	/benchmarks/design_arena/*/arena	/benchmarks/design_arena/*/category	/benchmarks/design_arena/*/elo	/benchmarks/design_arena/*/rank	/benchmarks/design_arena/*/win_rate
1	models	3d	1130	75	38.9
2	models	asciiart	1097	60	37.5
3	models	codecategories	1147	84	36
4	models	dataviz	1142	83	37.4
5	models	gamedev	1140	78	36.2
6	models	svg	1069	69	32.4
7	models	uicomponent	1142	78	36.2
8	models	website	1144	92	35

Reasoning · Supported Efforts

2 items · source order preserved

high
medium

API Details

Item	/reasoning/supported_efforts/*
1	high
2	medium