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Model comparison

Grok 4.7 vs Muse Spark 1.3

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

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

SpaceXAI

Grok 4.7

Frontier

vs

Meta

Muse Spark 1.3

Frontier

AI model capability comparison
SpecificationGrok 4.7Muse Spark 1.3
ProviderSpaceXAIMeta
TierFrontierFrontier
Context window500KWinner: 1.05M
Max outputNot verifiedUnverified131K
Input / 1M tokens$2Winner: $1.25
Output / 1M tokens$6Winner: $4.25
WeightsClosedClosed
Parametersnew, larger base model with longer RL on multi-hour tasksMeta frontier model
Reasoning levelslow, medium, high, xhighminimal, low, medium, high, xhigh, max
Modalitiestext, imagetext, image, video, audio, pdf
API model idgrok-4.7muse-spark-1.3
ReleasedSeptember 21, 2026September 2, 2026
Artificial Analysis Intelligence Index [xhigh] (2026-09-26)46.4Not verifiedUnverified
Artificial Analysis Intelligence Index [max] (2026-09-26)Not verifiedUnverified48.1
DeepSWE 1.1 [high] (2026-09-21)71Not verifiedUnverified
DeepSWE 1.1 (2026-09-02)Not verifiedUnverified75.4
Terminal-Bench 4.0 [xhigh] (2026-09-26)25.8Not verifiedUnverified
Terminal-Bench 2.1 (2026-09-03)Not verifiedUnverified88.8

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

Grok 4.7: $2/$6 per MTok (<200K prompt); $4/$12 for all tokens at ≥200K. Cached input $0.50/MTok ($1.00 at ≥200K). US regional endpoint 1.1x. No Batch API; the 2x-price 'Fast' variant is Cursor and Grok Build only. xAI lists no separate text-output cap. Knowledge cutoff May 2026.

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.

FrontierRecord checked September 26, 2026

Grok 4.7

Grok 4.7 is xAI's flagship since 2026-09-21 — a larger new base model with longer RL on multi-hour tasks, at Grok 4.6's $2/$6 price.

Best for

  • Coding agents
  • Cost-sensitive frontier work
  • Cursor and GitHub Copilot users

Watch out

Token rates double above a 200K-token prompt and there is no Batch API; the DeepSWE figure is vendor-reported.

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.

When the cheaper one wins

Muse Spark 1.3 is cheaper on output at $4.25 per million tokens against $6 for Grok 4.7 — about 1.4×. 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.
  • 2 shared named benchmarks with differing scores — Measured on: Artificial Analysis Intelligence Index, DeepSWE 1.1.
  • 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? Grok 4.7 · Muse Spark 1.3

Common questions

Grok 4.7 vs Muse Spark 1.3

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

Is Grok 4.7 or Muse Spark 1.3 cheaper for input?
Muse Spark 1.3 is cheaper at $1.25 per million input tokens, against $2 for Grok 4.7 — roughly 1.6× the price. Output tokens usually dominate a real bill, so weigh the output rate more heavily than the input rate. These are base rates; Grok 4.7 has tiered pricing: $2/$6 per MTok (<200K prompt); $4/$12 for all tokens at ≥200K. Cached input $0.50/MTok ($1.00 at ≥200K). US regional endpoint 1.1x. No Batch API; the 2x-price 'Fast' variant is Cursor and Grok Build only. xAI lists no separate text-output cap. Knowledge cutoff May 2026. 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.
Is Grok 4.7 or Muse Spark 1.3 cheaper for output?
Muse Spark 1.3 is cheaper at $4.25 per million output tokens, against $6 for Grok 4.7 — roughly 1.4× the price. Output tokens usually dominate a real bill, so weigh the output rate more heavily than the input rate. These are base rates; Grok 4.7 has tiered pricing: $2/$6 per MTok (<200K prompt); $4/$12 for all tokens at ≥200K. Cached input $0.50/MTok ($1.00 at ≥200K). US regional endpoint 1.1x. No Batch API; the 2x-price 'Fast' variant is Cursor and Grok Build only. xAI lists no separate text-output cap. Knowledge cutoff May 2026. 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.
Which has the larger context window, Grok 4.7 or Muse Spark 1.3?
Muse Spark 1.3 accepts 1.05M tokens against 500K for Grok 4.7. This only matters if you routinely send very long documents or large codebases.
Do Grok 4.7 and Muse Spark 1.3 support the same reasoning levels?
Grok 4.7 exposes low, medium, high, xhigh, while Muse Spark 1.3 exposes minimal, low, medium, high, xhigh, max.
Should I use Grok 4.7 or Muse Spark 1.3?
Both sit in the frontier tier, so the choice usually comes down to price and context rather than capability. Grok 4.7 suits coding agents; Muse Spark 1.3 suits long-horizon coding agents.

Next step

Choosing between them

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

  • Input price: Muse Spark 1.3 costs $1.25 per 1M tokens versus $2 for Grok 4.7 — a 1.6x difference at the headline tier.
  • Context: Muse Spark 1.3 takes 1.05M against 500K for Grok 4.7 — only decisive if your prompts approach the smaller window.
  • Measured capability: Muse Spark 1.3 leads Artificial Analysis Intelligence Index 48.1 to 46.4 (measured 2026-09-26).
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