ZMIME
Comparison · 2 models · Updated Oct 4, 2026

Muse Spark 1.3 vs Muse Spark 1.2

Too close to call on our weighted score (Muse Spark 1.3 73, Muse Spark 1.2 72). The right pick depends on what you value most.

  1. Meta

    Muse Spark 1.3

    Released Sep 2, 2026

    73/100
    • ECI156.9
    • Price$1.25 / $4.25
    • Context1.05M
    Full specs Remove Muse Spark 1.3

  2. Meta

    Muse Spark 1.2

    Released Aug 5, 2026

    72/100
    • ECI155.0
    • Price$1.25 / $4.25
    • Context1.05M
    Full specs Remove Muse Spark 1.2

  3. Add a model

    Make it a three-way comparison.

01 — Verdict

Too close to call

It is close. Our weighted score puts them within 1 points (Muse Spark 1.3 73/100, Muse Spark 1.2 72/100), so choose by what matters most for your work: Muse Spark 1.3 for raw capability. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.

  • CapabilityMuse Spark 1.3Capabilities Index (ECI): Muse Spark 1.3 156.9 · Muse Spark 1.2 155.0
  • Lowest priceSame priceMuse Spark 1.3 $2.00 · Muse Spark 1.2 $2.00 per 1M tokens (3:1 blend)
  • Longest contextAbout the sameMuse Spark 1.3 1,048,576 · Muse Spark 1.2 1,048,576 tokens
  • Widest inputsSame inputsMuse Spark 1.3: Text, Images, PDFs, Audio, Video · Muse Spark 1.2: Text, Images, PDFs, Audio, Video
  • Self-hostingNo open weightsBoth are available only through APIs
How the score is built
MeasureWeightMuse Spark 1.3Muse Spark 1.2
CapabilityCapabilities Index (ECI)50%8784
Price25%3636
Inputs & features15%100100
Context window10%6161
Overall100%73/10072/100
02 — Side by side

Every spec in one table

Highlighted cells lead their row. Dashes mean the data is not published.

Muse Spark 1.3 vs Muse Spark 1.2 specifications side by side
SpecificationMuse Spark 1.3MetaMuse Spark 1.2Meta
Capability
Capabilities Index (ECI)156.9 (best)155.0
ECI rank#17 of 148 (best)#30 of 148
FrontierMath Tiers 1–3Research-level mathematics74.4%—
OTIS Mock AIME 2024–2025Competition mathematics99.2%—
SimpleQA VerifiedShort factual questions—60.3%
Price per million tokens
Input$1.25$1.25
Output$4.25$4.25
Cached input$0.15$0.15
Blended (3:1)$2.00$2.00
Long-context rateSame rateSame rate
Price sourceOfficial Meta APIOfficial Meta API
Limits
Context window1,048,576 tokens1,048,576 tokens
Max output131,072 tokens131,072 tokens
Inputs and features
TextYesYes
ImagesYesYes
PDFsYesYes
AudioYesYes
VideoYesYes
ReasoningYesminimal · low · medium · high · xhigh · maxYesminimal · low · medium · high · xhigh
Tool callingYesYes
Structured outputYesYes
Availability
WeightsProprietaryProprietary
API model IDmuse-spark-1.3muse-spark-1.2
API providers1215 (best)
ReleasedSep 2, 2026Aug 5, 2026
Knowledge cutoff——
03 — Cost

What would a month cost?

Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.

  • Muse Spark 1.3$21.00
  • Muse Spark 1.2$21.00
04 — Questions

Which should you choose?

Which is better: Muse Spark 1.3 or Muse Spark 1.2?

It is close. Our weighted score puts them within 1 points (Muse Spark 1.3 73/100, Muse Spark 1.2 72/100), so choose by what matters most for your work: Muse Spark 1.3 for raw capability. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.

Which is cheaper, Muse Spark 1.3 or Muse Spark 1.2?

Muse Spark 1.3 and Muse Spark 1.2 cost the same: $1.25 input / $4.25 output per million tokens.

Which scores higher on benchmarks?

Muse Spark 1.3 scores higher on the Capabilities Index (ECI): Muse Spark 1.3 156.9 (#17 of 148) and Muse Spark 1.2 155.0 (#30 of 148). The confidence ranges of the top two overlap (154.7–159.6 vs 152.8–157.5), so treat the gap as small.

Which is better for coding?

There are no published SWE-bench Verified results for Muse Spark 1.3 and Muse Spark 1.2 yet, so there is no like-for-like coding score. On overall capability, Muse Spark 1.3 leads, which tends to carry over to coding, but test on your own codebase. Both support tool calling for agent workflows.

Which has the bigger context window?

Muse Spark 1.3 and Muse Spark 1.2 share the same 1,048,576-token context window. Maximum output per response: Muse Spark 1.3 up to 131,072, Muse Spark 1.2 up to 131,072 tokens.

Which can read images, PDFs, audio or video?

Muse Spark 1.3 accepts text, images, PDFs, audio and video; Muse Spark 1.2 accepts text, images, PDFs, audio and video. They handle the same number of input types.

Are any of these open source?

No. Muse Spark 1.3 and Muse Spark 1.2 are proprietary and only available through APIs and apps.

Which is newer?

Muse Spark 1.3 is the newest, released Sep 2, 2026. Muse Spark 1.2 came out Aug 5, 2026.

How do you decide the winner?

Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Oct 4, 2026.

05 — Keep comparing

Related comparisons