Catalog Changes · 2026-10-13 03:21:33.623561

NVIDIA: Nemotron 3 Ultra (free) · 2026-10-13 03:21:33.623561 UTC

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NVIDIA: Nemotron 3 Ultra (free)

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

Kilo Catalog Changes

Last Observed: 2026-10-13 18:02:46.745836 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... **Terms of service** For NVIDIA free endpoints (Super/Ultra/etc): Trial use only - do not submit personal or confidential data. Your use is logged for security purposes and to improve NVIDIA products and services. The logged session data for improvement purposes is not linked to your identity or any persistent identifier. For more information about our data processing practices, see our [Privacy Policy](https://www.nvidia.com/en-us/about-nvidia/privacy-policy/). By interacting with this endpoint, you consent to our collection, recording, and use of such information and the [NVIDIA API Trial Terms of Service](https://assets.ngc.nvidia.com/products/api-catalog/legal/NVIDIA%20API%20Trial%20Terms%20of%20Service.pdf).

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Architecture And Modalities · 2

Architecture · Modality API Details /architecture/modality text->text	text->text
Architecture · Tokenizer API Details /architecture/tokenizer Other	Other

Catalog Identity And Metadata · 14

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... Terms of service For NVIDIA free endpoints (Super/Ultra/etc): Trial use only - do not submit personal or confidential data. Your use is logged for security purposes and to improve NVIDIA products and services. The logged session data for improvement purposes is not linked to your identity or any persistent identifier. For more information about our data processing practices, see our [Privacy Policy](https://www.nvidia.com/en-us/about-nvidia/privacy-policy/). By interacting with this endpoint, you consent to our collection, recording, and use of such information and the [NVIDIA API Trial Terms of Service](https://assets.ngc.nvidia.com/products/api-catalog/legal/NVIDIA%20API%20Trial%20Terms%20of%20Service.pdf).	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… 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... Terms of service For NVIDIA free endpoints (Super/Ultra/etc): Trial use only - do not submit personal or confidential data. Your use is logged for security purposes and to improve NVIDIA products and services. The logged session data for improvement purposes is not linked to your identity or any persistent identifier. For more information about our data processing practices, see our [Privacy Policy](https://www.nvidia.com/en-us/about-nvidia/privacy-policy/). By interacting with this endpoint, you consent to our collection, recording, and use of such information and the [NVIDIA API Trial Terms of Service](https://assets.ngc.nvidia.com/products/api-catalog/legal/NVIDIA%20API%20Trial%20Terms%20of%20Service.pdf).
Expiration Date API Details /expiration_date Explicit Null	Explicit Null
Id API Details /id nvidia/nemotron-3-ultra-550b-a55b:free	nvidia/nemotron-3-ultra-550b-a55b:free
Is Free API Details /isFree True	True
May Train On Your Prompts API Details /mayTrainOnYourPrompts True	True
Name API Details /name NVIDIA: Nemotron 3 Ultra (free)	NVIDIA: Nemotron 3 Ultra (free)
Opencode · Variants · High · Reasoning · Effort API Details /opencode/variants/high/reasoning/effort high	high
Opencode · Variants · High · Reasoning · Enabled API Details /opencode/variants/high/reasoning/enabled True	True
Opencode · Variants · Medium · Reasoning · Effort API Details /opencode/variants/medium/reasoning/effort medium	medium
Opencode · Variants · Medium · Reasoning · Enabled API Details /opencode/variants/medium/reasoning/enabled True	True
Opencode · Variants · None · Reasoning · Effort API Details /opencode/variants/none/reasoning/effort none	none
Opencode · Variants · None · Reasoning · Enabled API Details /opencode/variants/none/reasoning/enabled False	False

Request Limits · 1

Per Request Limits API Details /per_request_limits Explicit Null	Explicit Null

Pricing · 3

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

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
Opencode API Details /opencode Object · See Fields	Object · See Fields
Opencode · Variants API Details /opencode/variants Object · See Fields	Object · See Fields
Opencode · Variants · High API Details /opencode/variants/high Object · See Fields	Object · See Fields
Opencode · Variants · High · Reasoning API Details /opencode/variants/high/reasoning Object · See Fields	Object · See Fields
Opencode · Variants · Medium API Details /opencode/variants/medium Object · See Fields	Object · See Fields
Opencode · Variants · Medium · Reasoning API Details /opencode/variants/medium/reasoning Object · See Fields	Object · See Fields
Opencode · Variants · None API Details /opencode/variants/none Object · See Fields	Object · See Fields
Opencode · Variants · None · Reasoning API Details /opencode/variants/none/reasoning Object · See Fields	Object · See Fields
Pricing API Details /pricing Object · See Fields	Object · See Fields
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