Scale Labs PRBench Legal (PRBench Legal)

We show this table for reference; we do not rank on it.

A Scale Labs public leaderboard mirrored as display-only reference data. It does not affect BenchLM rankings.

Scale score on PRBench Legal — September 29, 2026 snapshot

We mirror the published scale score view for PRBench Legal. Muse Spark 1.3 leads the public snapshot at 61.6%, followed by Muse Spark 1.1 (57.0%) and claude-fable 5\n\n (52.6%). We do not use these results to rank models overall.

1Proprietary

Muse Spark 1.3

Scale score table (39 models)

Score

Muse Spark 1.3Meta · Closed

61.6%

Muse Spark 1.1Meta · Closed

57.0%

claude-fable 5\n\nAnthropic

52.6%

Muse SparkMeta · Closed

52.3%

claude-opus-4-6 (Non-Thinking)Anthropic

52.3%

Fable 5.1 \nAnthropic

51.6%

gpt-5.6-sol (max)\nOpenAI

50.5%

gpt-5-proOpenAI

49.9%

o3-proOpenAI · Closed

49.7%

gpt-5.1-thinkingOpenAI

49.3%

gpt-5OpenAI

49.0%

Gemini 3.8 FlashGoogle · Closed

48.9%

o3OpenAI · Closed

48.6%

GPT 6 Astra\nOpenAI

48.4%

Grok 4.7 (xHigh)xAI

47.6%

Claude Opus 5.5Anthropic · Closed

47.6%

GPT-5.2 ProOpenAI · Closed

45.4%

gpt-5.4 (High)OpenAI

44.4%

Claude Opus 4.5 ThinkingAnthropic · Closed

44.2%

Gemini 3.1 ProGoogle · Closed

44.0%

Kimi K2.5Moonshot AI · Open weight

43.8%

GPT-6 LunaOpenAI · Closed

42.9%

Gemini 2.5 ProGoogle · Closed

41.4%

Gemini 2.5 FlashGoogle · Closed

41.0%

kimi-k2-thinkingMoonshot AI

40.9%

Claude Sonnet 4.5Anthropic · Closed

40.8%

gemini-3-pro-previewGoogle

40.6%

GPT-OSS 120BOpenAI · Open weight

40.2%

mistral-medium-latestMistral

39.5%

GPT-6 SolOpenAI · Closed

38.6%

qwen.qwen3-235b-a22b-2507-v1:0Alibaba

38.3%

o4-miniOpenAI

38.1%

deepseek-v3p1Deepseek

37.6%

deepseek-r1-0528Deepseek

36.6%

GPT-4.1OpenAI · Closed

36.5%

kimi-k2-instructMoonshot AI

36.4%

claude-opus-4-1-20250805Anthropic

34.0%

GPT-4.1 miniOpenAI · Closed

30.4%

llama4-maverick-instruct-basicMeta

24.8%

How to read this leaderboard

Compare the published configurations as complete evaluation systems. The source can combine a base model, agent scaffold, tools, budget, and inference setting in each result.

Operator receipt: 39 sourced rows are currently displayable on this page; the leading published row is Muse Spark 1.3 at 61.6%.

Honest limit: This Scale table is display-only context, not benchmark provenance or a weighted model-only comparison.

PRBench Legal on Scale Labs

How BenchLM shows PRBench Legal

BenchLM mirrors 39 published rows from Scale Labs’ public PRBench Legal leaderboard, captured on September 29, 2026 snapshot.

The table is display only. It is useful context for a published agent or model configuration, but it does not enter BenchLM’s overall or category rankings.

Snapshot

39 published rowsScale Labs sourceDisplay only

PRBench Legal on Scale Labs

The published PRBench Legal snapshot places Muse Spark 1.3 first at 61.6%. The third row is 9.0 points behind. The broader top-10 range is 12.2 points, so the table still separates the published systems.

39 models have been evaluated on PRBench Legal. The benchmark falls in the Knowledge category. We keep external benchmark mirrors separate from the weighted global scoring system, so these results remain source-specific evidence. PRBench Legal is currently displayed for reference but excluded from the scoring formula, so it does not directly affect overall rankings.

About PRBench Legal

Year

2026

Tasks

39 published rows

Format

Published Scale leaderboard score

Difficulty

External agent and model evaluation

BenchLM mirrors 39 published rows from the PRBench Legal public table captured on September 29, 2026 snapshot.

Scale Labs leaderboard Public benchmark source

Freshness and provenance

Version

PRBench Legal 2026

Refresh cadence

Quarterly

Staleness state

Current

Question availability

Public benchmark set

CurrentDisplay only

BenchLM uses freshness metadata to decide whether a benchmark should still be treated as a strong differentiator, a benchmark to watch, or a display-only reference. For the full scoring policy, see the BenchLM methodology page.

Questions

What does PRBench Legal measure?

A Scale Labs public leaderboard mirrored as display-only reference data. It does not affect BenchLM rankings.

Which model leads the published PRBench Legal snapshot?

Muse Spark 1.3 currently leads the published PRBench Legal snapshot with 61.6% scale score. BenchLM shows this benchmark for display only and does not use it in overall rankings.

How many models are evaluated on PRBench Legal?

The September 29, 2026 snapshot snapshot contains 39 AI models.

Last updated: September 29, 2026 snapshot · mirrored from the public benchmark leaderboard

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