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Meta AI

Muse Spark 1.1

Released Jul 9, 2026 · knowledge cutoff unpublished

Status
Frontier
Location
United States
Modality
Multimodal
Context window
1M
Max output
128K
Speed (xhigh effort)
217 tok/s · 2.89s to first answer token
Price ($/MTok in / out)
$1.25 / $4.25
Cost per task (xhigh effort)
$0.26
Open weights
No
Benchmarks3 of 8 reported

GPQA Diamond

89.8%

Humanity's Last Exam

62.1%

LMArena Elo

1495

MMLU-Pro

—

SWE-bench Verified

—

Terminal-Bench 2.1

—

AIME (latest)

—

ARC-AGI-2

—
Strengths & weaknesses

Strengths

  • Handles a multi-step browser task without hand-holding — tool and computer use are the point
  • Takes text, images, video, PDFs and audio in a single prompt
  • Good at creative and tone-shifting work: drafting, editing, adapting for an audience

Weaknesses

  • Long-horizon agentic work still drifts where the leaders hold together
  • Closed and metered, a departure from Meta's open-weights history

Second Meta Superintelligence Labs release, an upgrade to the original Muse Spark (April 2026) and Meta's first paid API model. HLE 62.1% (with tools) per Meta/BenchLM; Artificial Analysis separately reports a 40% → 45% no-tools HLE gain over the original Muse Spark. SWE-bench Pro 61.5% reported; no SWE-bench Verified figure published. GPQA Diamond 89.8% and LMArena Elo 1495 ('Muse Spark 1.1' text-arena listing, arena.ai) are third-party. ARC-AGI-2, MMLU-Pro, and AIME not published for this release. Knowledge cutoff not disclosed.

For developers

API model strings

  • metamuse-spark-1.1

Licence

Proprietary — weights not released

Retirement

No retirement announced

Lineage

No recorded predecessor

News