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    Legal Agent Benchmark

    🏆 Leaderboard

    As of August 31, 2026, Claude Mythos 5 is #1 for Legal Agent Benchmark at 16.9%. Ranked by the Legal Agent Benchmark score 14 models in this index have a published Legal Agent Benchmark score. Legal Agent Benchmark leaderboard: rank models by Legal Agent Benchmark next to live API token prices.

    Updated August 31, 2026345 models36 providers

    Legal Agent Benchmark vs price

    14 models. Left is cheaper. Up is a higher score. The line is the best score you can buy at each price — a dot under it is a worse deal than something on the line.

    Best score at each price#1 on this board
    Claude Mythos 5
    Anthropic · Proprietary
    		16.9%$60.00
    Claude Fable 5
    Anthropic · Proprietary
    		13.3%$60.00
    Claude Opus 5
    Anthropic · Proprietary
    		11.7%$30.00
    Claude Opus 4.7
    Anthropic · Proprietary
    		7.1%$30.00
    Claude Sonnet 5
    Anthropic · Proprietary
    		5.8%$12.00
    Claude Sonnet 4.6
    Anthropic · Proprietary
    		5.4%$18.00
    Claude Opus 4.6
    Anthropic · Proprietary
    		4.2%$30.00
    GPT-5.5
    OpenAI · Proprietary
    		2.1%$35.00
    Gemini 3.5 Flash
    Google · Proprietary
    		0.8%$10.50
    GPT-5.4
    OpenAI · Proprietary
    		0.4%$17.50
    GPT-5.4 mini
    OpenAI · Proprietary
    		0%$5.25
    Gemini 3.1 Pro
    Google · Proprietary
    		0%$17.50
    Gemini 3.1 Flash-Lite
    Google · Proprietary
    		0%$1.75
    Gemini 3 Flash
    Google · Proprietary
    		0%$3.50
    ChatGPT-4o Latest
    OpenAI · Proprietary
    		—$12.50
    Claude 3 Haiku
    Anthropic · Proprietary
    		—$1.50
    Claude 3 Opus
    Anthropic · Proprietary
    		—$90.00
    Claude 3 Sonnet
    Anthropic · Proprietary
    		—$18.00
    Claude 3.5 Haiku
    Anthropic · Proprietary
    		—$4.80
    Claude 3.5 Sonnet
    Anthropic · Proprietary
    		—$18.00
    Claude 3.5 Sonnet
    Anthropic · Proprietary
    		—$18.00
    Claude 3.7 Sonnet
    Anthropic · Proprietary
    		—$18.00
    Claude Haiku 4.5
    Anthropic · Proprietary
    		—$6.00
    Claude Mythos Preview
    Anthropic · Proprietary
    		—$60.00
    Claude Opus 4
    Anthropic · Proprietary
    		—$90.00
    Claude Opus 4.1
    Anthropic · Proprietary
    		—$90.00
    Claude Opus 4.5
    Anthropic · Proprietary
    		—$30.00
    Claude Opus 4.8
    Anthropic · Proprietary
    		—$30.00
    Claude Sonnet 4
    Anthropic · Proprietary
    		—$18.00
    Claude Sonnet 4.5
    Anthropic · Proprietary
    		—$18.00
    Codestral-22BOSS
    Mistral · Open Source · via Mistral AI
    		—$1.20
    Command A+OSS
    Cohere · Open Source
    		—$12.50
    Command R+OSS
    Cohere · Open Source
    		—$1.25
    Composer 2
    Cursor · Proprietary
    		—$3.00
    Composer 2 Fast
    Cursor · Proprietary
    		—$9.00
    DeepSeek R1 Distill Llama 70BOSS
    DeepSeek · Open Source
    		—$0.50
    DeepSeek R1 Distill Qwen 32BOSS
    DeepSeek · Open Source
    		—$0.30
    DeepSeek VL2OSS
    DeepSeek · Open Source · via Replicate
    		—$2.80
    DeepSeek VL2 SmallOSS
    DeepSeek · Open Source · via Replicate
    		—$1.70
    DeepSeek VL2 TinyOSS
    DeepSeek · Open Source · via Replicate
    		—$0.90
    DeepSeek-R1OSS
    DeepSeek · Open Source
    		—$2.74
    DeepSeek-R1-0528OSS
    DeepSeek · Open Source
    		—$2.74
    DeepSeek-V2.5OSS
    DeepSeek · Open Source
    		—$0.42
    DeepSeek-V3OSS
    DeepSeek · Open Source
    		—$1.37
    DeepSeek-V3 0324OSS
    DeepSeek · Open Source
    		—$1.42
    DeepSeek-V3.1OSS
    DeepSeek · Open Source
    		—$1.27
    DeepSeek-V3.2OSS
    DeepSeek · Open Source · via OpenRouter
    		—$0.57
    DeepSeek-V3.2 (Non-thinking)OSS
    DeepSeek · Open Source
    		—$0.70
    DeepSeek-V3.2-ExpOSS
    DeepSeek · Open Source
    		—$0.68
    DeepSeek-V4-Flash-0423OSS
    DeepSeek · Open Source
    		—$0.30
    Showing 1–50 of 345 models

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    The index

    All Large Language Models

    345 models across 36 providers. Search or jump to a lab — every model page stays linked here.

    OpenAI52Anthropic22Google34Cursor2xAI17DeepSeek20MiniMax7Qwen55AI21 Labs2Amazon7Baidu2ByteDance4Cohere4IBM2Inception1inclusionAI1LG AI Research1Liquid AI2Meituan4Meta12Microsoft9Mistral26Moonshot AI11Nous Research1NVIDIA9OpenBMB1Poolside2Sakana AI1Sarvam AI2StepFun2Tencent1Thinking Machines1Unisound1Upstage1Xiaomi5Z AI21

    Baidu

    2 models
    ERNIE 5.0ERNIE 4.5

    Inception

    1 models
    Mercury 2

    inclusionAI

    1 models
    Ling-3.0-flash

    LG AI Research

    1 models
    K-EXAONE-236B-A23B

    Liquid AI

    2 models
    LFM2.5-VL-3BLFM2.5-2.6B

    Nous Research

    1 models
    Hermes 3 70B

    OpenBMB

    1 models
    MiniCPM-SALA

    Sakana AI

    1 models
    Sakana Namazu

    Sarvam AI

    2 models
    Sarvam-105BSarvam-30B

    Tencent

    1 models
    Hy3

    Thinking Machines

    1 models
    Inkling-Small

    Unisound

    1 models
    U2

    Upstage

    1 models
    Solar Pro 4

    Which model leads Legal Agent Benchmark right now?

    As of August 31, 2026, Claude Mythos 5 by Anthropic is #1 for Legal Agent Benchmark at 16.9%. Ranked by the Legal Agent Benchmark score This board also tracks Legal Agent Benchmark. Next on the same board: Claude Fable 5 and Claude Opus 5. This legal agent benchmark leaderboard ranks models by Legal Agent Benchmark. Scores come from public evals. Prices are the live API rates in the table above.

    Sources: OpenAI API pricing (https://developers.openai.com/api/docs/pricing); Anthropic Claude API pricing (https://platform.claude.com/docs/en/about-claude/pricing); Gemini API pricing (https://ai.google.dev/gemini-api/docs/pricing)

    Top 8 for legal agent benchmark. Ranked by the Legal Agent Benchmark score Input and output are dollars per million tokens.
    RankModelLegal Agent BenchmarkInput /MOutput /M
    1Claude Mythos 516.9%$10.00$50.00
    2Claude Fable 513.3%$10.00$50.00
    3Claude Opus 511.7%$5.00$25.00
    4Claude Opus 4.77.1%$5.00$25.00
    5Claude Sonnet 55.8%$2.00$10.00
    6Claude Sonnet 4.65.4%$3.00$15.00
    7Claude Opus 4.64.2%$5.00$25.00
    8GPT-5.52.1%$5.00$30.00

    Related LLM leaderboards

    LLM LeaderboardCodingMathAgenticReasoningWritingScienceFinanceLong ContextVisionOpen Source

    Individual benchmark pages

    Rank one eval at a time. All LLM benchmarks.

    HLESWE BenchHumanity's Last Exam (No Tools)Humanity's Last Exam (With Tools)Terminal-Bench 2.0Terminal-BenchTerminal-Bench 2.1Terminal-Bench 2Terminal-Bench 3.0ARC-AGI-1 Verified

    Legal Agent Benchmark FAQ

    Who ranks #1 on the Legal Agent Benchmark leaderboard?

    As of August 31, 2026, Claude Mythos 5 by Anthropic ranks #1 on Legal Agent Benchmark at 16.9%. API pricing is $10.00/M input and $50.00/M output.

    What are the top models on Legal Agent Benchmark?

    The current Legal Agent Benchmark ranking as of August 31, 2026 is 1. Claude Mythos 5 at 16.9%; 2. Claude Fable 5 at 13.3%; 3. Claude Opus 5 at 11.7%.

    Which legal agent benchmark model is the cheapest?

    Gemini 3.1 Flash-Lite is the cheapest scored model on this legal agent benchmark leaderboard at $0.25/M input and $1.50/M output ($1.75 blended). Claude Mythos 5 still leads Legal Agent Benchmark at 16.9%.

    Should I always pick the #1 Legal Agent Benchmark model?

    Not automatically. Claude Mythos 5 leads Legal Agent Benchmark, but a cheaper scored model can be the better production choice if the quality gap is small. Use the table to weigh Legal Agent Benchmark against input/output price, context window, and related evals.

    How often is the Legal Agent Benchmark leaderboard updated?

    Scores and API prices on this page are refreshed from published evals and provider rates. The snapshot is labeled August 31, 2026. Treat it as a current index, not a one-off blog post.

    What is Legal Agent Benchmark?

    Legal Agent Benchmark is a public LLM eval (the Legal Agent Benchmark score). This page ranks models that have published a score, next to live API prices.

    Where is the Legal Agent Benchmark leaderboard?

    This page is the Legal Agent Benchmark leaderboard. Models are sorted by Legal Agent Benchmark, with input and output token prices on the same row so you can weigh score against cost. Official boards often omit price; that comparison is the point of this index.

    How is this Legal Agent Benchmark ranking different from the official board?

    Official eval pages own the methodology. This page keeps the published Legal Agent Benchmark score next to live API $/M so you can pick a production SKU, not only a trophy number.