Model profile / Meta

Muse Spark 1.2

Meta's multimodal Muse Spark 1.2 supports text, image, audio and video work with tools, a 1M-token context, configurable xhigh reasoning and announced open-weight availability, while retaining its official Meta Model API pricing.

5 Aug 2026Open weights announcedProvider

Sources & details

Four areas of evidence

The capabilities behind the model.

How the indices work

Reasoning

114.9Index points

Mathematical and scientific problem solving.

This model│ Other models · 155 rated

Score and research range

Full-precision point: 114.8570321201806
Range: 112.24–117.48 · 90% Research Range
Scope: Conditional fuller R0 A

Score includes qualified prediction of missing evidence.

Coding

102.6Index points

Software engineering and programming.

This model│ Other models · 39 rated

Score and research range

Full-precision point: 102.62779712967281
Range: No qualified range available
Scope: Frozen Coding score under admitted comparison/reference/source reweighting

Score uses the admitted direct native evidence under the selected method.

General

60.2Index points

Factual reliability and instruction following.

This model│ Other models · 61 rated

Score and research range

Full-precision point: 60.175000000000004
Range: No qualified range available
Scope: General G4 under admitted instruction-task portfolio resampling conditional on exact recorded R and U

Score uses the admitted direct native evidence under the selected method.

Agentic

109.9Index points

Tool use, workflows and professional tasks.

This model│ Other models · 40 rated

Score and research range

Full-precision point: 109.87175269103386
Range: 108.09–111.32 · 90% Research Range
Scope: Agentic score under joint reference/source reweighting conditional on admitted W/X/P native outcomes

Score uses the admitted direct native evidence under the selected method.

22retained native records

16evidence families

Capabilities estimateQualified original evidence across four areas.

Current index snapshot · 2026-09-16. Each category uses its own scale; scores across categories are not directly comparable. Evidence counts describe the retained Capabilities inputs; a family can contain several tasks or configurations. A point lead does not establish superiority.

Performance in context

Capabilities, price & speed.

Explore every model

Muse Spark 1.2 is highlighted wherever a compatible measurement is available.

Muse Spark 1.2: First-party page did not expose a verifiable checkpoint-specific token price; no AA/provider-median substitute

Lumina Capabilities Index

Capabilities versus API price

The current Capabilities cohort, with this model highlighted.

Lumina

2025+ · 62 models · 1 highlighted

Chart loads as you explore

Lumina Capabilities Index

Capabilities versus output speed

The current Capabilities cohort, with this model highlighted.

Lumina

2025+ · 72 models · Developer API · 10K · 1 highlighted

Chart loads as you explore

Explore the detail

Sources & model details.

Original evidence, with its context.

Current index evidence 5Scores, research ranges and the sources behind each category.

Capabilities

Score uses the admitted direct native evidence under the selected method.

Exact checkpoint: muse-spark-1-2
Method: methods-a4471cee84fd478d2ed3
Range interpretation: C1 native factor under conditional crossed source/family reweighting of admitted fixed-corpus reference and own portfolio
Sources: Artificial Analysis:Artificial Analysis · Datacurve:Datacurve · Epoch AI:Epoch AI · HKUST-NLP:HKUST-NLP · LiveBench:LiveBench
Source cutoff: {"asOfMeaning":"Selected local candidate: retained historical measurements plus reviewed additions; execution dates remain source-native.","newIdentityRecovery":"2026-09-13T08:41:08.804270+00:00","publicProjectionDate":"2026-09-16T06:02:45.491398+00:00","scoring":"Inherited pinned baseline source vintages plus retained4A/4A.1 originals and SWE owner correction; heterogeneous execution dates, often unknown. Not a claim of simultaneous2026-09-13 execution."}

Explore this index

Coding

Score uses the admitted direct native evidence under the selected method.

Exact checkpoint: muse-spark-1-2
Method: methods-a4471cee84fd478d2ed3
Range interpretation: Frozen Coding score under admitted comparison/reference/source reweighting
Sources: Artificial Analysis · Datacurve · LiveBench
Source cutoff: {"asOfMeaning":"Selected local candidate: retained historical measurements plus reviewed additions; execution dates remain source-native.","newIdentityRecovery":"2026-09-13T08:41:08.804270+00:00","publicProjectionDate":"2026-09-16T06:02:45.491398+00:00","scoring":"Inherited pinned baseline source vintages plus retained4A/4A.1 originals and SWE owner correction; heterogeneous execution dates, often unknown. Not a claim of simultaneous2026-09-13 execution."}

Explore this index

Reasoning

Score includes qualified prediction of missing evidence.

Exact checkpoint: muse-spark-1-2
Method: methods-a4471cee84fd478d2ed3
Range interpretation: Conditional fuller R0 A
Sources: aa
Source cutoff: {"asOfMeaning":"Selected local candidate: retained historical measurements plus reviewed additions; execution dates remain source-native.","newIdentityRecovery":"2026-09-13T08:41:08.804270+00:00","publicProjectionDate":"2026-09-16T06:02:45.491398+00:00","scoring":"Inherited pinned baseline source vintages plus retained4A/4A.1 originals and SWE owner correction; heterogeneous execution dates, often unknown. Not a claim of simultaneous2026-09-13 execution."}

Explore this index

Agentic

Score uses the admitted direct native evidence under the selected method.

Exact checkpoint: muse-spark-1-2
Method: methods-a4471cee84fd478d2ed3
Range interpretation: Agentic score under joint reference/source reweighting conditional on admitted W/X/P native outcomes
Sources: Artificial Analysis · Toolathlon team (HKUST-NLP)
Source cutoff: {"asOfMeaning":"Selected local candidate: retained historical measurements plus reviewed additions; execution dates remain source-native.","newIdentityRecovery":"2026-09-13T08:41:08.804270+00:00","publicProjectionDate":"2026-09-16T06:02:45.491398+00:00","scoring":"Inherited pinned baseline source vintages plus retained4A/4A.1 originals and SWE owner correction; heterogeneous execution dates, often unknown. Not a claim of simultaneous2026-09-13 execution."}

Explore this index

General

Score uses the admitted direct native evidence under the selected method.

Exact checkpoint: muse-spark-1-2
Method: methods-a4471cee84fd478d2ed3
Range interpretation: General G4 under admitted instruction-task portfolio resampling conditional on exact recorded R and U
Sources: Artificial Analysis · LiveBench
Source cutoff: {"asOfMeaning":"Selected local candidate: retained historical measurements plus reviewed additions; execution dates remain source-native.","newIdentityRecovery":"2026-09-13T08:41:08.804270+00:00","publicProjectionDate":"2026-09-16T06:02:45.491398+00:00","scoring":"Inherited pinned baseline source vintages plus retained4A/4A.1 originals and SWE owner correction; heterogeneous execution dates, often unknown. Not a claim of simultaneous2026-09-13 execution."}

Explore this index

Benchmark measurements 32Published values in each benchmark’s own units.

32 measurements

Muse Spark 1.2 published benchmark measurements
Benchmark	Result	Published configuration	Source
AA Long Context Reasoningstandard	83.333%	Muse Spark 1.2 (xhigh; Artificial Analysis independent run)Artificial Analysis AA-LCR evaluation	Muse Spark 1.2 individual evaluations ↗Observed 2026-08-27 · checked 2026-08-27independently-verified · ranking-eligible
CritPtstandard	17.714%	Muse Spark 1.2 (xhigh; Artificial Analysis independent run)Artificial Analysis CritPt evaluation	Muse Spark 1.2 individual evaluations ↗Observed 2026-08-27 · checked 2026-08-27independently-verified · ranking-eligible
GDPval-AA v2v2	55.621%	Muse Spark 1.2 (xhigh; Artificial Analysis independent run)Artificial Analysis GDPval-AA v2	Muse Spark 1.2 individual evaluations ↗Observed 2026-08-27 · checked 2026-08-27independently-verified · ranking-eligible
GPQA Diamonddiamond	90.404%	Muse Spark 1.2 (xhigh; Artificial Analysis independent run)Artificial Analysis GPQA Diamond evaluation	Muse Spark 1.2 individual evaluations ↗Observed 2026-08-27 · checked 2026-08-27independently-verified · ranking-eligible
Humanity's Last Examtext-only current	45.459%	Muse Spark 1.2 (xhigh; Artificial Analysis independent run)Artificial Analysis text-only HLE evaluation	Muse Spark 1.2 individual evaluations ↗Observed 2026-08-27 · checked 2026-08-27independently-verified · ranking-eligible
SciCode2024	56.366%	Muse Spark 1.2 (xhigh; Artificial Analysis independent run)Artificial Analysis SciCode evaluation	Muse Spark 1.2 individual evaluations ↗Observed 2026-08-27 · checked 2026-08-27independently-verified · reference-only
τ³-Banking3	34.845%	Muse Spark 1.2 (xhigh; Artificial Analysis independent run)Artificial Analysis tau3-Banking evaluation	Muse Spark 1.2 individual evaluations ↗Observed 2026-08-27 · checked 2026-08-27independently-verified · ranking-eligible
Terminal-Bench2.1	80.15%	Muse Spark 1.2 (xhigh; Artificial Analysis independent run)Artificial Analysis Terminal-Bench v2.1 in e2b	Muse Spark 1.2 individual evaluations ↗Observed 2026-08-27 · checked 2026-08-27independently-verified · ranking-eligible
SimpleQA Verified1.2.0	60.302%	Muse Spark 1.2 (xhigh)Epoch AI benchmark runner	Epoch AI permanent refresh source ↗Observed 2026-08-27 · checked 2026-09-01independently-verified · reference-only
DeepSWEv1.1	59.3%	Muse Spark 1.2 (xhigh)Meta release chart for DeepSWE 1.1; the chart labels each agent scaffold separately	Meta Superintelligence Labs permanent refresh source ↗Observed 2026-08-05 · checked 2026-08-15provider-reported · reference-only

Showing 10 of 32 measurements

Specifications & source recordsDocumented model details and original references.

Model ID / checkpoint: muse-spark-1-2
Weight access: Open weights announced
Context window: 1,000,000
Maximum output: Not documented
Modalities: text, image, audio, video
Details checked: 27 Aug 2026

Specialist task evidenceSeparate agent runs and execution conditions.

Specialist evidence

Agent runs and task economics

Source-native operational evidence for Muse Spark 1.2. Exact configurations remain separate. Costs are comparable only within the same selected benchmark/evaluation, and these rows never enter Overall Score.

Specialist only · ranking prohibited

Evaluation	Exact configuration	Performance	Cost / task	Tokens / task	Execution
Artificial Analysis Coding Agents · 1.4 · composite Artificial Analysis Coding Agents · checked 2026-08-29	muse-spark-1-2-xhigh Muse Code - Muse Spark 1.2 (xhigh)	61.6	$2.07	19963139	151.4 steps
Artificial Analysis Coding Agents · 1.4 · composite Artificial Analysis Coding Agents · checked 2026-08-29	muse-spark-1-2-xhigh Opencode - Muse Spark 1.2 (xhigh)	58.9	$1.91	16350688	65.9 steps

All models

Model profile / Meta

Muse Spark 1.2

5 Aug 2026Open weights announcedProvider

Sources & details

Four areas of evidence

The capabilities behind the model.

How the indices work

Reasoning

114.9Index points

Mathematical and scientific problem solving.

This model│ Other models · 155 rated

Score and research range

Full-precision point: 114.8570321201806
Range: 112.24–117.48 · 90% Research Range
Scope: Conditional fuller R0 A

Score includes qualified prediction of missing evidence.

Coding

102.6Index points

Software engineering and programming.

This model│ Other models · 39 rated

Score and research range

Full-precision point: 102.62779712967281
Range: No qualified range available
Scope: Frozen Coding score under admitted comparison/reference/source reweighting

Score uses the admitted direct native evidence under the selected method.

General

60.2Index points

Factual reliability and instruction following.

This model│ Other models · 61 rated

Score and research range

Full-precision point: 60.175000000000004
Range: No qualified range available
Scope: General G4 under admitted instruction-task portfolio resampling conditional on exact recorded R and U

Score uses the admitted direct native evidence under the selected method.

Agentic

109.9Index points

Tool use, workflows and professional tasks.

This model│ Other models · 40 rated

Score and research range

Full-precision point: 109.87175269103386
Range: 108.09–111.32 · 90% Research Range
Scope: Agentic score under joint reference/source reweighting conditional on admitted W/X/P native outcomes

Score uses the admitted direct native evidence under the selected method.

22retained native records

16evidence families

Capabilities estimateQualified original evidence across four areas.

Performance in context

Capabilities, price & speed.

Explore every model

Muse Spark 1.2 is highlighted wherever a compatible measurement is available.

Muse Spark 1.2: First-party page did not expose a verifiable checkpoint-specific token price; no AA/provider-median substitute

Lumina Capabilities Index

Capabilities versus API price

The current Capabilities cohort, with this model highlighted.

Lumina

2025+ · 62 models · 1 highlighted

Chart loads as you explore

Lumina Capabilities Index

Capabilities versus output speed

The current Capabilities cohort, with this model highlighted.

Lumina

2025+ · 72 models · Developer API · 10K · 1 highlighted

Chart loads as you explore

Explore the detail

Sources & model details.

Original evidence, with its context.

Current index evidence 5Scores, research ranges and the sources behind each category.

Capabilities

Score uses the admitted direct native evidence under the selected method.

Exact checkpoint: muse-spark-1-2
Method: methods-a4471cee84fd478d2ed3
Range interpretation: C1 native factor under conditional crossed source/family reweighting of admitted fixed-corpus reference and own portfolio
Sources: Artificial Analysis:Artificial Analysis · Datacurve:Datacurve · Epoch AI:Epoch AI · HKUST-NLP:HKUST-NLP · LiveBench:LiveBench
Source cutoff: {"asOfMeaning":"Selected local candidate: retained historical measurements plus reviewed additions; execution dates remain source-native.","newIdentityRecovery":"2026-09-13T08:41:08.804270+00:00","publicProjectionDate":"2026-09-16T06:02:45.491398+00:00","scoring":"Inherited pinned baseline source vintages plus retained4A/4A.1 originals and SWE owner correction; heterogeneous execution dates, often unknown. Not a claim of simultaneous2026-09-13 execution."}

Explore this index

Coding

Score uses the admitted direct native evidence under the selected method.

Exact checkpoint: muse-spark-1-2
Method: methods-a4471cee84fd478d2ed3
Range interpretation: Frozen Coding score under admitted comparison/reference/source reweighting
Sources: Artificial Analysis · Datacurve · LiveBench
Source cutoff: {"asOfMeaning":"Selected local candidate: retained historical measurements plus reviewed additions; execution dates remain source-native.","newIdentityRecovery":"2026-09-13T08:41:08.804270+00:00","publicProjectionDate":"2026-09-16T06:02:45.491398+00:00","scoring":"Inherited pinned baseline source vintages plus retained4A/4A.1 originals and SWE owner correction; heterogeneous execution dates, often unknown. Not a claim of simultaneous2026-09-13 execution."}

Explore this index

Reasoning

Score includes qualified prediction of missing evidence.

Exact checkpoint: muse-spark-1-2
Method: methods-a4471cee84fd478d2ed3
Range interpretation: Conditional fuller R0 A
Sources: aa
Source cutoff: {"asOfMeaning":"Selected local candidate: retained historical measurements plus reviewed additions; execution dates remain source-native.","newIdentityRecovery":"2026-09-13T08:41:08.804270+00:00","publicProjectionDate":"2026-09-16T06:02:45.491398+00:00","scoring":"Inherited pinned baseline source vintages plus retained4A/4A.1 originals and SWE owner correction; heterogeneous execution dates, often unknown. Not a claim of simultaneous2026-09-13 execution."}

Explore this index

Agentic

Score uses the admitted direct native evidence under the selected method.

Exact checkpoint: muse-spark-1-2
Method: methods-a4471cee84fd478d2ed3
Range interpretation: Agentic score under joint reference/source reweighting conditional on admitted W/X/P native outcomes
Sources: Artificial Analysis · Toolathlon team (HKUST-NLP)
Source cutoff: {"asOfMeaning":"Selected local candidate: retained historical measurements plus reviewed additions; execution dates remain source-native.","newIdentityRecovery":"2026-09-13T08:41:08.804270+00:00","publicProjectionDate":"2026-09-16T06:02:45.491398+00:00","scoring":"Inherited pinned baseline source vintages plus retained4A/4A.1 originals and SWE owner correction; heterogeneous execution dates, often unknown. Not a claim of simultaneous2026-09-13 execution."}

Explore this index

General

Score uses the admitted direct native evidence under the selected method.

Exact checkpoint: muse-spark-1-2
Method: methods-a4471cee84fd478d2ed3
Range interpretation: General G4 under admitted instruction-task portfolio resampling conditional on exact recorded R and U
Sources: Artificial Analysis · LiveBench
Source cutoff: {"asOfMeaning":"Selected local candidate: retained historical measurements plus reviewed additions; execution dates remain source-native.","newIdentityRecovery":"2026-09-13T08:41:08.804270+00:00","publicProjectionDate":"2026-09-16T06:02:45.491398+00:00","scoring":"Inherited pinned baseline source vintages plus retained4A/4A.1 originals and SWE owner correction; heterogeneous execution dates, often unknown. Not a claim of simultaneous2026-09-13 execution."}

Explore this index

Benchmark measurements 32Published values in each benchmark’s own units.

32 measurements

Muse Spark 1.2 published benchmark measurements
Benchmark	Result	Published configuration	Source
AA Long Context Reasoningstandard	83.333%	Muse Spark 1.2 (xhigh; Artificial Analysis independent run)Artificial Analysis AA-LCR evaluation	Muse Spark 1.2 individual evaluations ↗Observed 2026-08-27 · checked 2026-08-27independently-verified · ranking-eligible
CritPtstandard	17.714%	Muse Spark 1.2 (xhigh; Artificial Analysis independent run)Artificial Analysis CritPt evaluation	Muse Spark 1.2 individual evaluations ↗Observed 2026-08-27 · checked 2026-08-27independently-verified · ranking-eligible
GDPval-AA v2v2	55.621%	Muse Spark 1.2 (xhigh; Artificial Analysis independent run)Artificial Analysis GDPval-AA v2	Muse Spark 1.2 individual evaluations ↗Observed 2026-08-27 · checked 2026-08-27independently-verified · ranking-eligible
GPQA Diamonddiamond	90.404%	Muse Spark 1.2 (xhigh; Artificial Analysis independent run)Artificial Analysis GPQA Diamond evaluation	Muse Spark 1.2 individual evaluations ↗Observed 2026-08-27 · checked 2026-08-27independently-verified · ranking-eligible
Humanity's Last Examtext-only current	45.459%	Muse Spark 1.2 (xhigh; Artificial Analysis independent run)Artificial Analysis text-only HLE evaluation	Muse Spark 1.2 individual evaluations ↗Observed 2026-08-27 · checked 2026-08-27independently-verified · ranking-eligible
SciCode2024	56.366%	Muse Spark 1.2 (xhigh; Artificial Analysis independent run)Artificial Analysis SciCode evaluation	Muse Spark 1.2 individual evaluations ↗Observed 2026-08-27 · checked 2026-08-27independently-verified · reference-only
τ³-Banking3	34.845%	Muse Spark 1.2 (xhigh; Artificial Analysis independent run)Artificial Analysis tau3-Banking evaluation	Muse Spark 1.2 individual evaluations ↗Observed 2026-08-27 · checked 2026-08-27independently-verified · ranking-eligible
Terminal-Bench2.1	80.15%	Muse Spark 1.2 (xhigh; Artificial Analysis independent run)Artificial Analysis Terminal-Bench v2.1 in e2b	Muse Spark 1.2 individual evaluations ↗Observed 2026-08-27 · checked 2026-08-27independently-verified · ranking-eligible
SimpleQA Verified1.2.0	60.302%	Muse Spark 1.2 (xhigh)Epoch AI benchmark runner	Epoch AI permanent refresh source ↗Observed 2026-08-27 · checked 2026-09-01independently-verified · reference-only
DeepSWEv1.1	59.3%	Muse Spark 1.2 (xhigh)Meta release chart for DeepSWE 1.1; the chart labels each agent scaffold separately	Meta Superintelligence Labs permanent refresh source ↗Observed 2026-08-05 · checked 2026-08-15provider-reported · reference-only

Showing 10 of 32 measurements

Specifications & source recordsDocumented model details and original references.

Model ID / checkpoint: muse-spark-1-2
Weight access: Open weights announced
Context window: 1,000,000
Maximum output: Not documented
Modalities: text, image, audio, video
Details checked: 27 Aug 2026

Specialist task evidenceSeparate agent runs and execution conditions.

Specialist evidence

Agent runs and task economics

Specialist only · ranking prohibited

Evaluation	Exact configuration	Performance	Cost / task	Tokens / task	Execution
Artificial Analysis Coding Agents · 1.4 · composite Artificial Analysis Coding Agents · checked 2026-08-29	muse-spark-1-2-xhigh Muse Code - Muse Spark 1.2 (xhigh)	61.6	$2.07	19963139	151.4 steps
Artificial Analysis Coding Agents · 1.4 · composite Artificial Analysis Coding Agents · checked 2026-08-29	muse-spark-1-2-xhigh Opencode - Muse Spark 1.2 (xhigh)	58.9	$1.91	16350688	65.9 steps

The capabilities behind the model.

Capabilities, price & speed.

Capabilities versus API price

Capabilities versus output speed

Sources & model details.

Capabilities

Coding

Reasoning

Agentic

General

Agent runs and task economics

More from Meta.

Muse Spark 1.3

Muse Spark 1.1

Muse Spark

The capabilities behind the model.

Capabilities, price & speed.

Capabilities versus API price

Capabilities versus output speed

Sources & model details.

Capabilities

Coding

Reasoning

Agentic

General

Agent runs and task economics

More from Meta.

Muse Spark 1.3

Muse Spark 1.1

Muse Spark