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AI Choice Engine

Model comparison

Muse Spark 1.3 vs NVIDIA Nemotron 3 Ultra

Meta against NVIDIA, compared on context, price, and verified benchmark results.

Catalog record checked September 26, 2026Individual provider fields may changeEvidence confidence: High — see receipts below

Meta

Muse Spark 1.3

Frontier

vs

NVIDIA

NVIDIA Nemotron 3 Ultra

Frontier · Open weights

AI model capability comparison
SpecificationMuse Spark 1.3NVIDIA Nemotron 3 Ultra
ProviderMetaNVIDIA
TierFrontierFrontier
Context windowWinner: 1.05M1M
Max output131KNot verifiedUnverified
Input / 1M tokens$1.25Winner: $0.50
Output / 1M tokens$4.25Winner: $2.20
WeightsClosedOpen
ParametersMeta frontier model550B total / 55B active (MoE)
Reasoning levelsminimal, low, medium, high, xhigh, maxlow, high, max
Modalitiestext, image, video, audio, pdftext
API model idmuse-spark-1.3nemotron-3-ultra-550b-a55b
ReleasedSeptember 2, 2026June 4, 2026
Artificial Analysis Intelligence Index [max] (2026-09-26)48.1Not verifiedUnverified
Artificial Analysis Intelligence Index (2026-09-26)Not verifiedUnverified22.9
DeepSWE 1.1 (2026-09-02)75.4Not verifiedUnverified
Terminal-Bench 2.1 (2026-09-03)88.8Not verifiedUnverified

Prices are USD per million tokens at standard rates, excluding batch and caching discounts. Bold indicates the better figure where one is objectively better. Values we could not confirm from the provider are shown as “Not verified” rather than estimated.

Benchmark receipts

Where each score comes from, and how far it can be compared across models.

Pricing tiers

Muse Spark 1.3: $1.25/$4.25 per MTok on Meta's Model API (Standard tier; cached input $0.15); a $0.10/$0.20 'contributor' tier applies when your data is used for training. Meta's pricing page lists no long-context premium and no scheduled price change.

NVIDIA Nemotron 3 Ultra: Open weights (weights + data + recipes); $0.50/$2.20 per MTok is the third-party hosted rate (OpenRouter; hosts report cached input $0.10, 262K served context and 16,384 output — secondary). 550B/55B MoE, 1M native context.

FrontierRecord checked September 26, 2026

Muse Spark 1.3

Muse Spark 1.3 is Meta's September 2026 frontier refresh — a self-reported DeepSWE 1.1 field leader at $1.25/$4.25, with a 1M-token context aimed at autonomous agent workflows.

Best for

  • Long-horizon coding agents
  • Frontier quality below frontier pricing
  • Meta ecosystem

Watch out

The headline 75.4% DeepSWE score comes from the 'max' thinking mode, which is not broadly available yet and is pending independent verification. The 131,072 output cap is per third-party API docs — Meta's own spec page does not publish it. Closed weights.

FrontierOpen weightsRecord checked September 26, 2026

NVIDIA Nemotron 3 Ultra

Nemotron 3 Ultra is NVIDIA's open-weight (550B/55B) frontier MoE with a 1M-token context.

Best for

  • Open-weight frontier
  • Self-hosting on NVIDIA GPUs
  • Reasoning

Watch out

Top US open-weight until Thinking Machines Inkling; verify hosted pricing.

When the cheaper one wins

NVIDIA Nemotron 3 Ultra is cheaper on output at $2.20 per million tokens against $4.25 for Muse Spark 1.3 — about 1.9×. Use the cheaper tier for classification, extraction, summarisation, and any task where the expensive model’s extra score does not change the accepted output. The expensive one only pays if your hardest task actually fails on the cheap tier. These are standard-tier API rates, excluding batch and cache discounts.

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Evidence confidence: High

How strong and complete the evidence behind this comparison is — not a prediction of which model is better.

  • Pricing verified on both sides — Input and output rates are verified for both models.
  • 4/5 core specs verified on both sides — Not published for at least one side: max output.
  • 1 shared named benchmark with differing scores — Measured on: Artificial Analysis Intelligence Index.
  • Verified within the last 90 days — Newest catalog check was 2 days ago.
  • Both models carry source citations — Each side has at least two catalog sources on record.

Source receipts

Each catalog figure was checked against the provider or an independent second source on the date shown.

Related comparisons

Diving deeper on one model? Muse Spark 1.3 · NVIDIA Nemotron 3 Ultra

Common questions

Muse Spark 1.3 vs NVIDIA Nemotron 3 Ultra

Answered from the verified figures on this page rather than general guidance.

Is Muse Spark 1.3 or NVIDIA Nemotron 3 Ultra cheaper for input?
NVIDIA Nemotron 3 Ultra is cheaper at $0.50 per million input tokens, against $1.25 for Muse Spark 1.3 — roughly 2.5× the price. Output tokens usually dominate a real bill, so weigh the output rate more heavily than the input rate. These are base rates; Muse Spark 1.3 has tiered pricing: $1.25/$4.25 per MTok on Meta's Model API (Standard tier; cached input $0.15); a $0.10/$0.20 'contributor' tier applies when your data is used for training. Meta's pricing page lists no long-context premium and no scheduled price change. NVIDIA Nemotron 3 Ultra has tiered pricing: Open weights (weights + data + recipes); $0.50/$2.20 per MTok is the third-party hosted rate (OpenRouter; hosts report cached input $0.10, 262K served context and 16,384 output — secondary). 550B/55B MoE, 1M native context.
Is Muse Spark 1.3 or NVIDIA Nemotron 3 Ultra cheaper for output?
NVIDIA Nemotron 3 Ultra is cheaper at $2.20 per million output tokens, against $4.25 for Muse Spark 1.3 — roughly 1.9× the price. Output tokens usually dominate a real bill, so weigh the output rate more heavily than the input rate. These are base rates; Muse Spark 1.3 has tiered pricing: $1.25/$4.25 per MTok on Meta's Model API (Standard tier; cached input $0.15); a $0.10/$0.20 'contributor' tier applies when your data is used for training. Meta's pricing page lists no long-context premium and no scheduled price change. NVIDIA Nemotron 3 Ultra has tiered pricing: Open weights (weights + data + recipes); $0.50/$2.20 per MTok is the third-party hosted rate (OpenRouter; hosts report cached input $0.10, 262K served context and 16,384 output — secondary). 550B/55B MoE, 1M native context.
Which has the larger context window, Muse Spark 1.3 or NVIDIA Nemotron 3 Ultra?
Muse Spark 1.3 accepts 1.05M tokens against 1M for NVIDIA Nemotron 3 Ultra. This only matters if you routinely send very long documents or large codebases.
Do Muse Spark 1.3 and NVIDIA Nemotron 3 Ultra support the same reasoning levels?
Muse Spark 1.3 exposes minimal, low, medium, high, xhigh, max, while NVIDIA Nemotron 3 Ultra exposes low, high, max.
Should I use Muse Spark 1.3 or NVIDIA Nemotron 3 Ultra?
Both sit in the frontier tier, so the choice usually comes down to price and context rather than capability. Muse Spark 1.3 suits long-horizon coding agents; NVIDIA Nemotron 3 Ultra suits open-weight frontier.
Can I self-host Muse Spark 1.3 or NVIDIA Nemotron 3 Ultra?
NVIDIA Nemotron 3 Ultra publishes open weights, but self-hosting and third-party provider access depend on the licence, hardware, serving support, and availability. Muse Spark 1.3 is a closed model whose supported access paths are controlled by its provider.

Next step

Choosing between them

The verified figures that separate this pair, computed from the catalog rather than restated boilerplate.

  • Input price: NVIDIA Nemotron 3 Ultra costs $0.50 per 1M tokens versus $1.25 for Muse Spark 1.3 — a 2.5x difference at the headline tier.
  • Context: Muse Spark 1.3 takes 1.05M against 1M for NVIDIA Nemotron 3 Ultra — only decisive if your prompts approach the smaller window.
  • Measured capability: Muse Spark 1.3 leads Artificial Analysis Intelligence Index 48.1 to 22.9 (measured 2026-09-26).
  • Deployment: NVIDIA Nemotron 3 Ultra publishes weights you can self-host; the other is API-only.
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