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Pyyan / Compare / Muse Spark 1.3 vs Claude Opus 5

Muse Spark 1.3 vs Claude Opus 5

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Language Models · verified 5 Sept 2026

Muse Spark 1.3Metacurrent
Claude Opus 5Anthropiccurrent
3 slots left
SpecificationMuse Spark 1.3Claude Opus 5
SummaryA quarter fewer tokens than 1.2 for the same work, which is the figure on the bill.Complex agentic coding and enterprise work at half the cost of Fable 5.
Context1M1M
Input ($/Mtok)$1.25$5
Output ($/Mtok)$4.25$25
LicenceProprietaryProprietary
Max outputNot published128K
ParametersNot published—
Released2 Sep 202624 Jul 2026
Model IDmuse-spark-1.3claude-opus-5
CategoryLanguage ModelsLanguage Models
Official—Anthropic ↗

Highlighted rows are where these differ.

Muse Spark 1.3

  • About 20% fewer tool calls and 25% fewer tokens than 1.2 to reach the same result
  • 75.4 on DeepSWE v1.1 and 98.5 on MRCR long context between 256K and 512K
  • A Contributor tier costs $0.10 in and $0.20 out for the same model, in exchange for letting Meta train on your prompts

Best for long running agentic coding.

Full spec sheet →

Claude Opus 5

  • Thinking on by default — a step change over Opus 4.8
  • 512-token prompt-cache minimum, down from 1024
  • Separate rate-limit bucket from the Opus 4.x pool

Best for agentic coding.

Full spec sheet →