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Model comparison · Updated 10 Oct 2026

Muse Spark 1.3 vs Grok 4.3

Muse Spark 1.3 and Grok 4.3 cost the same on input, $1.25 per 1M tokens. Muse Spark 1.3 has the larger context window (1.05M against 1M tokens). For a support chatbot at 10,000 chats a day, the standard-tier bill is about $945 a month for Muse Spark 1.3 and $788 for Grok 4.3.

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ModelsAtlas. “Muse Spark 1.3 vs Grok 4.3”. Retrieved 10 Oct 2026. https://modelsatlas.com/compare/meta/muse-spark-1-3/vs/xai/grok-4-3

Model A

Muse Spark 1.3

by Meta · weights not marked open · GRIDE5

Input / 1M
$1.25
observed We measured
Source
Our catalogue
Retrieved
10 Oct 2026
Output / 1M$4.25
Context1.05M
vs

Model B

Grok 4.3

by xAI · weights not marked open · GRIDE5

Input / 1M
$1.25
observed We measured
Source
Our catalogue
Retrieved
17 Aug 2026
Output / 1M$2.50
Context1M

Key numbers

Standard tier · highlighted = better

Muse Spark 1.3
Grok 4.3
Input / 1M tokens
$1.25
$1.25
Output / 1M tokens
$4.25
$2.50
Batch input / output
Not listed
$1.00 / $2.00
Context window
1,048,576
1,000,000
Input types
Not disclosed
Not disclosed
Weights
Not marked open
Not marked open
Tiers listed
standard
batch, standard
Prices checked
2026-10-10
2026-10-10

What it costs for real workloads

Monthly, standard tier, 30 days

Support chatbot10k chats/day · 1.5k in, 300 out
$945/mo
$788/mo
RAG over documents2k queries/day · 12k in, 500 out
$1,028/mo
$975/mo
Coding agent300 tasks/day · 60k in, 8k out
$981/mo
$855/mo

Muse Spark 1.3   Grok 4.3 · Derived from the standard-tier prices above, input and output tokens per request as stated, 30 days. Excludes caching discounts and batch. Try your own numbers.

On the atlas

Price band (A–H) × context band (1–6)

Same square. Muse Spark 1.3 and Grok 4.3 share E5.

Same square as Muse Spark 1.3: Gemini 2.5 Pro Preview 06-05 ($1.25), Muse Spark 1.1 ($1.25), Muse Spark 1.2 ($1.25). Open E5

AFreeB<$0.10C$0.10–0.30D$0.30–1E$1–3F$3–10G$10–30H$30+1<32K232–128K3128–256K4256K–1M51M6>1MINPUT PRICE PER 1M TOKENS →CONTEXT WINDOW ↑ · position within a square follows the real valueGemini 2.5 Pro Preview 06-05 · E5Muse Spark 1.1 · E5Muse Spark 1.2 · E5Gemini 3.5 Flash · E5Claude Sonnet 5 · E5Muse Spark 1.3Muse Spark 1.3Grok 4.3Grok 4.3
Muse Spark 1.3Grok 4.3Nearest neighboursOpen weights
View the map as a table (1 squares)
SquarePrice bandContext bandModels
GRIDE5$1–31MMuse Spark 1.3, Grok 4.3, Gemini 2.5 Pro Preview 06-05, Muse Spark 1.1, Muse Spark 1.2, Gemini 3.5 Flash, Claude Sonnet 5

Capabilities side by side

Only what our records list

Muse Spark 1.3
Grok 4.3
Vision input
Not disclosed
Not disclosed
Audio input
Not disclosed
Not disclosed
Open weights
Not marked open
Not marked open
Batch tier
Not listed
Supported
Free tier
Not listed
Not listed
Thinking tier
Not listed
Not listed

Neither record lists input types, so we do not claim any.

Which should you choose?

Editorial

Choose Muse Spark 1.3 if…

  • your prompts are long: it takes 1,048,576 tokens against 1,000,000

Choose Grok 4.3 if…

  • output dominates your bill: $2.50 per 1M output against $4.25
  • work can wait: it lists a batch tier and the other does not

Each reason is a fact from the tables above. Picking between them is our judgement, and we do not benchmark quality: price and context are what we can measure, so test both on your own prompts before you commit.

Questions

Is Muse Spark 1.3 better than Grok 4.3?
We do not benchmark quality, so we cannot say. On the recorded numbers: Muse Spark 1.3 and Grok 4.3 cost the same on input, $1.25 per 1M tokens. Muse Spark 1.3 has the larger context window (1.05M against 1M tokens). For a support chatbot at 10,000 chats a day, the standard-tier bill is about $945 a month for Muse Spark 1.3 and $788 for Grok 4.3. Which is better for you depends on your task; test both on your own prompts.
Which is cheaper, Muse Spark 1.3 or Grok 4.3?
They cost the same on input, $1.25 per 1M tokens. Output is $4.25 for Muse Spark 1.3 and $2.50 for Grok 4.3.
How much does each cost per 1M tokens?
Muse Spark 1.3: $1.25 input and $4.25 output. Grok 4.3: $1.25 input and $2.50 output. Standard tier, USD.
Which has the larger context window?
Muse Spark 1.3, with 1,048,576 tokens. Grok 4.3 has 1,000,000 tokens.
Do both offer batch pricing?
Muse Spark 1.3 lists no batch tier. Grok 4.3 lists a batch tier, at 80% of its standard price.
Can both read images or audio?
Input types recorded for Muse Spark 1.3: none recorded. For Grok 4.3: none recorded. Where a record lists none we say so rather than guess; check each vendor's documentation before relying on a capability.
Is either model open-weight?
Muse Spark 1.3: not marked open-weight in our records. Grok 4.3: not marked open-weight in our records.
What would each cost for a support chatbot?
At 10,000 chats a day, 1,500 input and 300 output tokens each, 30 days, standard tier: about $945 a month for Muse Spark 1.3 and $788 for Grok 4.3. This is our calculation from the listed prices, not a quote.

About the two models

Muse Spark 1.3

By Meta. $1.25 input and $4.25 output per 1M tokens, 1.05M context, atlas square E5. Tiers listed: standard.

Full specs & pricing →

Grok 4.3

By xAI. $1.25 input and $2.50 output per 1M tokens, 1M context, atlas square E5. Tiers listed: batch, standard.

Full specs & pricing →

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