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Model comparison · accepted catalogue facts 2026-10-16

Muse Spark 1.2 vs Muse Spark 1.2 Contributor

A quality score or a computable price is missing. This pair has no better-and-cheaper verdict.

Observed search question: “muse spark 1.2 vs muse spark 1.2 contributor” · 2026-09-09

Muse Spark 1.2

LMArena general · Elo · higher is better

Scale starts at 1040 Elo

1484.9

Balanced effective USD / 1M tokens · lower is better

$2.00/M

Muse Spark 1.2 Contributor

LMArena general · Elo · higher is better

Scale starts at 1040 Elo

—

Balanced effective USD / 1M tokens · lower is better

$0.125/M

In-Depth Analysis

Muse Spark 1.2 vs Muse Spark 1.2 Contributor: Measured Technical Breakdown

Comprehensive comparison across measured human-preference evaluation, effective production token costs, architectural limits, and migration trade-offs.

Measured Capability (LMArena)
Partial or missing benchmark score

Muse Spark 1.2: 1484.9 Elo · Muse Spark 1.2 Contributor: Unrated

Cost Comparison Across Canonical Production Workloads

Rates represent effective cost per 1M tokens under standard token blends. Cached prompt reads are factored according to workload context reuse.

Workload & RatioMuse Spark 1.2Muse Spark 1.2 ContributorCost DifferenceAdvantage
Balanced 3 tokens in per 1 out$2.00 /1M tokens$0.125 /1M tokens$1.88 (94% diff)Muse Spark 1.2 Contributor costs less
Summarise Huge input, tiny output$1.09 /1M tokens$0.077 /1M tokens$1.01 (93% diff)Muse Spark 1.2 Contributor costs less
Chat Long cached system prompt$2.12 /1M tokens$0.111 /1M tokens$2.01 (95% diff)Muse Spark 1.2 Contributor costs less
Code gen Output dominates$2.96 /1M tokens$0.152 /1M tokens$2.81 (95% diff)Muse Spark 1.2 Contributor costs less
Agentic Context replayed each turn$1.05 /1M tokens$0.057 /1M tokens$0.989 (95% diff)Muse Spark 1.2 Contributor costs less

Architectural & Operational Specifications

SpecificationMuse Spark 1.2Muse Spark 1.2 ContributorOperational Note
Context window1,048,576 tokens1,048,576 tokens—
Max output generation943,718 tokens943,718 tokens—
Base input price$1.25 / 1M tokens$0.100 / 1M tokensMuse Spark 1.2 Contributor input rate is cheaper
Base output price$4.25 / 1M tokens$0.200 / 1M tokensMuse Spark 1.2 Contributor output rate is cheaper
Cached input price$0.150 / 1M tokens$0.0020 / 1M tokensMuse Spark 1.2 Contributor offers lower cached prompt cost
Reasoning & thinking tokensSupported; standard ratesSupported; standard rates—
Input modalitiestext, image, video, file, audiotext, image, video, file, audio—
Tool calling / function useSupportedSupported—
Open weights & licenceProprietary (proprietary)Proprietary (proprietary)—
Provider & reseller marketMeta · 1 provider offersMeta · 1 provider offers—

When to Choose Muse Spark 1.2

  • Higher measured general capability (1484.9 Elo on human evaluation).
  • Direct integration with Meta tooling and API features.

When to Choose Muse Spark 1.2 Contributor

  • Direct integration with Meta tooling and API features.

Detailed Evidence Passports & Independent Audits

Muse Spark 1.2 Full model card, pricing ladder & provider offers → Muse Spark 1.2 Contributor Full model card, pricing ladder & provider offers → Alternatives to Muse Spark 1.2 Better-and-cheaper dominance audit → Alternatives to Muse Spark 1.2 Contributor Better-and-cheaper dominance audit →

Compare · model decision

Choose two or three models

Inspect the differences, estimate your workload and keep the evidence. All standard catalogue models are available, including unrated ones.

Catalogue facts
2026-10-16

2 / 3 selected · 0 requirements
Open public comparison link
Public workload and requirements

These settings are included in the share link. The fixed-request scenario and private evaluation data below are excluded.

A ↔ B

A quality score or a computable price is missing. This pair has no better-and-cheaper verdict.

Estimated blend: 75% input, 25% output; 0% cached input. Base context tier. Prompt length selects the billing tier. An unlisted cache-read rate uses that tier’s full input rate in this blend; missing required input or output rates prevent an estimate. The fixed-request estimate below validates actual context and output limits and requires a published cache-read rate when cache hits are assumed.

What changes between these models

Quality first, then estimated price. LMArena scores are human-preference measurements, not a benchmark of your application. A missing score is unrated.

  • Muse Spark 1.2 · Meets the stated model requirements
  • Muse Spark 1.2 Contributor · Meets the stated model requirements
Material differences and unknown evidence. Deltas compare each model with model A. Unknown facts remain visible.
Measured factA Muse Spark 1.2B Muse Spark 1.2 Contributor
LMArena general score (Elo)1,484.9Unknown
Score interval half-width (± Elo)7.38Unknown
Benchmark reasoning effortxhighUnknown
LMArena document score (Elo)UnknownUnknown
Estimated effective USD / 1M tokens$2$0.125Δ vs A: -1.875 USD/M
Base input USD / 1M tokens$1.25$0.1Δ vs A: -1.15 USD/M
Base output USD / 1M tokens$4.25$0.2Δ vs A: -4.05 USD/M
Base cached-input USD / 1M tokens$0.15$0.002Δ vs A: -0.148 USD/M
Recorded retirement dateUnknownUnknown
11 shared measured facts
Shared measured facts. Deltas compare each model with model A. Unknown facts remain visible.
Measured factA Muse Spark 1.2B Muse Spark 1.2 Contributor
Context window (tokens)1,048,5761,048,576Δ vs A: 0 tokens
Output limit (tokens)943,718943,718Δ vs A: 0 tokens
Input modalitiestext, image, video, file, audiotext, image, video, file, audio
Tool useSupportedSupportedΔ vs A: 0
ReasoningSupportedSupportedΔ vs A: 0
Open weightsNot supportedNot supportedΔ vs A: 0
Recorded licenceproprietaryproprietary
Model providerMetaMeta
Distinct sellers in the catalogue11Δ vs A: 0
Serving precision differs across offersNot supportedNot supportedΔ vs A: 0
Retirement evidenceNone announced; not a guaranteeNone announced; not a guarantee

Provider counts and precision flags describe catalogue offers. They do not establish the precision, availability, region, tool behaviour or limits of your chosen endpoint. Open each model’s provider table before switching.

Complete price ladders and billing conditions

Muse Spark 1.2

Rates below are USD per 1M tokens. A threshold selects that whole input/output rate pair.

Input-token thresholdInputOutputCached input
Base, up to and including first threshold$1.25$4.25$0.15

Muse Spark 1.2 Contributor

Rates below are USD per 1M tokens. A threshold selects that whole input/output rate pair.

Input-token thresholdInputOutputCached input
Base, up to and including first threshold$0.1$0.2$0.002
Migration preflight · compare each candidate with model A

Keeping Muse Spark 1.2 is a valid decision. No pairwise comparison certifies a drop-in replacement.

Muse Spark 1.2 → Muse Spark 1.2 Contributor

No known model-capability loss

  • Provider endpoint, serving precision, availability and task success need your own verification. Catalogue model capabilities do not certify an endpoint.
Check alternatives to Muse Spark 1.2

Estimate a fixed request shape

Private to this tab unless you save locally or explicitly export private details. These are estimates, not observed invoices. Cross-model token counts and task success are assumptions.

0.1 extra attempts means 10 extra full attempts per 100 requests. Cache writes, tool charges, taxes and unlisted charges are excluded.

  • Muse Spark 1.2Estimated total: $4.625 1,000 full attempts · base rates
  • Muse Spark 1.2 ContributorEstimated total: $0.3 1,000 full attempts · base rates
Prompt and output sensitivity · sampled scenarios

Every point recalculates the entire request shape. Tier-boundary samples include one token below, at and above each threshold. Ordering between samples is not guaranteed. Lowest known cost excludes unknown estimates and is not a replacement recommendation.

Vary input; hold output, requests, cache and retries fixed.
Input tokensMuse Spark 1.2Muse Spark 1.2 ContributorCoverage
2,000$4.625$0.3Lowest knownAll computed
4,096$7.245$0.5096Lowest knownAll computed
32,768$43.085$3.3768Lowest knownAll computed
131,072$165.965$13.2072Lowest knownAll computed
Vary output; hold input, requests, cache and retries fixed.
Output tokensMuse Spark 1.2Muse Spark 1.2 Contributor
128$3.044$0.2256
2,048$11.204$0.6096
8,192$37.316$1.8384

Bring your observed evaluation results

JSON is parsed locally. Prompts, filenames, individual responses and extra fields are not retained. Import only aggregate measurements for selected models. Task/version labels do not establish that two evaluations used the same dataset.

Expected format
[{"model":"provider/exact-model-id","task":"support-answer","version":"rubric-1","attempts":100,"successes":84,"costUsd":2.4,"latencyMs":950}]

Use the exact catalogue ID. Replace the example values with observed measurements. Omit costUsd or latencyMs when they are unknown. No public score is inferred from these observations.

Keep the decision and its evidence

A portable record retains selected facts, complete tier ladders, public requirements and the publication manifest. It also embeds the full permitted public catalogue to verify the input artifact checksum. Files are larger for this reason (up to 2 MB); local storage is limited to 12 records. Team review is local to this browser; there is no hosted collaboration.

Saving is opt-in and includes private review fields. Shared comparison links never include them. Version 1 Check references remain separate and are not overwritten or guessed into this format.

Saved local decisions · 0

No version 2 decision records are stored in this browser.

Questions this page answers

Is Muse Spark 1.2 a better-and-cheaper replacement for Muse Spark 1.2 Contributor?

A quality score or a computable price is missing. This pair has no better-and-cheaper verdict.

Which model is higher rated: Muse Spark 1.2 or Muse Spark 1.2 Contributor?

Muse Spark 1.2 scores 1484.9 ±7.4 on LMArena general, while Muse Spark 1.2 Contributor is unrated. An unrated status reflects absence of benchmark evidence, not a zero score.

Which model is more cost-effective: Muse Spark 1.2 or Muse Spark 1.2 Contributor?

On a standard balanced workload (3 prompt tokens per 1 generated token), Muse Spark 1.2 Contributor costs $0.125 per 1M tokens versus $2.00 for Muse Spark 1.2. Muse Spark 1.2 is approximately 16.0× the price of Muse Spark 1.2 Contributor. Base input rates are $1.25 for Muse Spark 1.2 and $0.100 for Muse Spark 1.2 Contributor; base output rates are $4.25 for Muse Spark 1.2 and $0.200 for Muse Spark 1.2 Contributor.

How do their context windows and generation limits compare?

Both Muse Spark 1.2 and Muse Spark 1.2 Contributor provide an identical 1,048,576-token context window. Maximum output generation limits are 943,718 tokens for Muse Spark 1.2 and 943,718 tokens for Muse Spark 1.2 Contributor.

What capabilities are lost when switching between Muse Spark 1.2 and Muse Spark 1.2 Contributor?

Neither model exhibits a confirmed loss in declared context or modalities when switching between them. However, differences in tokenizer efficiency, prompt alignment, and latency across providers should be benchmarked on task-specific test suites.

Can Muse Spark 1.2 or Muse Spark 1.2 Contributor be self-hosted or deployed privately?

Both Muse Spark 1.2 and Muse Spark 1.2 Contributor are proprietary cloud models offered via managed API endpoints. Muse Spark 1.2 is served by Meta and 1 catalogue offers, while Muse Spark 1.2 Contributor is served by Meta and 1 catalogue offers.

What is included in this comparison?

Accepted model capabilities, context and output limits, complete price-tier ladders, independent LMArena measurements and missing evidence. Provider endpoint precision and application success still need verification.

Can I compare a different workload or keep a decision record?

Yes. Change the public workload, prompt length and requirements in the comparison workspace. Fixed-request scenarios, aggregate evaluations and review notes stay local unless explicitly exported.

Evidence & Ask
Markdown for LLMs