GET

/v1/models/nvidia/nvidia-nvidia-nemotron-3-ultra-550b-a55b

provider nvidiastatus activefirst seen Jun 4, 2026last seen 12m ago
rawIdnvidia/nemotron-3-ultra-550b-a55b
displayName—
idnvidia-nvidia-nemotron-3-ultra-550b-a55b
activitychat
schemaEndpointIdno bound generation route
releasedAtno release date reported by the provider
firstSeenAt1780531200 — Jun 4, 2026
lastSeenAt1794561501 — 12m ago
pricingnot published by this provider’s list endpoint
contextWindow1048576
maxOutput32768
modalities{"input":["text"],"output":["text"]}
capabilities{"tools":true,"reasoning":true,"structured_outputs":false}
requestMap{"thinking":{"on":{"reasoning_effort":"high"},"off":null,"levels":null},"maxTokensField":"max_tokens","developerRole":false,"replayReasoningContent":null,"store":null,"strictTools":null,"sessionAffinity":null,"cacheControl":null,"toolStream":null,"reasoningEffort":true}
knowledgeCutoff · openWeights · weightsUrl · providerMetadatanot published by this provider’s list endpoint

Endpoints & schemas

GET /v1/schemas/nvidia →
endpointactivity
nvidia/nemotron-3-ultra-550b-a55b
input · output
chat

endpoints matching this model — the provider has more, see /v1/schemas/nvidia

Sources

fieldrecorded source
contextWindowhttps://build.nvidia.com/nvidia/nemotron-3-ultra-550b-a55b

docs-derived

contextWindow

Source trace
072d57ac3ef69a1979d43e697db3da675c777441fac9fe248ae817a718b05933
maxOutputhttps://docs.api.nvidia.com/nim/reference/nvidia-nemotron-3-ultra-550b-a55b-infer.md

docs-derived

max_tokens

Source trace
70f96acb27f43d33d8edde6fa8bda6f98e64d718eccfa9c141c2fc4d2ab09615
modalitieshttps://build.nvidia.com/nvidia/nemotron-3-ultra-550b-a55b

docs-derived

modalities

Source trace
072d57ac3ef69a1979d43e697db3da675c777441fac9fe248ae817a718b05933
reasoninghttps://docs.api.nvidia.com/nim/reference/nvidia-nemotron-3-ultra-550b-a55b-infer.md

docs-derived

reasoning_effort

Source trace
70f96acb27f43d33d8edde6fa8bda6f98e64d718eccfa9c141c2fc4d2ab09615
capabilities.toolshttps://build.nvidia.com/nvidia/nemotron-3-ultra-550b-a55b

docs-derived

capabilities.tools

Source trace
072d57ac3ef69a1979d43e697db3da675c777441fac9fe248ae817a718b05933
capabilities.reasoninghttps://docs.api.nvidia.com/nim/reference/nvidia-nemotron-3-ultra-550b-a55b-infer.md

docs-derived

reasoning_effort

Source trace
70f96acb27f43d33d8edde6fa8bda6f98e64d718eccfa9c141c2fc4d2ab09615
capabilities.structured_outputshttps://build.nvidia.com/nvidia/nemotron-3-ultra-550b-a55b

docs-derived

capabilities.structured_outputs

Source trace
072d57ac3ef69a1979d43e697db3da675c777441fac9fe248ae817a718b05933
schemaEndpointIdhttps://docs.api.nvidia.com/nim/reference/nvidia-nemotron-3-ultra-550b-a55b-infer.md

docs-derived

paths

Source trace
70f96acb27f43d33d8edde6fa8bda6f98e64d718eccfa9c141c2fc4d2ab09615
requestMapFields.maxTokensFieldhttps://docs.api.nvidia.com/nim/reference/nvidia-nemotron-3-ultra-550b-a55b-infer.md

docs-derived

max_tokens

Source trace
70f96acb27f43d33d8edde6fa8bda6f98e64d718eccfa9c141c2fc4d2ab09615
requestMapFields.developerRolehttps://docs.api.nvidia.com/nim/reference/nvidia-nemotron-3-ultra-550b-a55b-infer.md

docs-derived

messages.items.role

Source trace
70f96acb27f43d33d8edde6fa8bda6f98e64d718eccfa9c141c2fc4d2ab09615
requestMapFields.reasoningEfforthttps://docs.api.nvidia.com/nim/reference/nvidia-nemotron-3-ultra-550b-a55b-infer.md

docs-derived

reasoning_effort

Source trace
70f96acb27f43d33d8edde6fa8bda6f98e64d718eccfa9c141c2fc4d2ab09615
requestMapFields.thinkinghttps://docs.api.nvidia.com/nim/reference/nvidia-nemotron-3-ultra-550b-a55b-infer.md

docs-derived

reasoning_effort

Source trace
70f96acb27f43d33d8edde6fa8bda6f98e64d718eccfa9c141c2fc4d2ab09615
requestMapFields.replayReasoningContenthttps://docs.api.nvidia.com/nim/reference/nvidia-nemotron-3-ultra-550b-a55b-infer

Value unknown (null); not published in the checked source · checked 2026-10-09.

pricinghttps://docs.api.nvidia.com/nim/docs/product

Value unknown (null); not published in the checked source · checked 2026-10-06.

cacheReadhttps://docs.api.nvidia.com/nim/docs/product

Value unknown (null); not published in the checked source · checked 2026-10-06.

activitySource unknown — no source URL recorded.
requestMapSource unknown — no source URL recorded.

Use it

shell
$ curl https://modelschemas.com/v1/schemas/nvidia/chat/nvidia/nemotron-3-ultra-550b-a55b # request schema
$ curl -X POST https://modelschemas.com/v1/validate -d '{"provider":"nvidia","endpointId":"nvidia/nemotron-3-ultra-550b-a55b","payload":{…}}'
$ curl -X POST https://modelschemas.com/v1/estimate -d '{"provider":"nvidia","model":"nvidia/nemotron-3-ultra-550b-a55b","usage":{"input_tokens":1200,"output_tokens":400}}'